Class / Patent application number | Description | Number of patent applications / Date published |
702191000 | For noise removal or suppression | 78 |
20080228448 | WAVEFORM MEASURING APPARATUS AND METHOD THEREOF - A waveform measuring apparatus includes: a digital filter for removing a large-amplitude changing component from an input signal and for outputting a resultant output signal with a small-amplitude noise component left therein; a window generating section for receiving a differential signal between this input signal and the resultant output signal of the digital filter and for generating a window indicating a position of an edge portion of the differential signal; and a ringing measurement section for extracting, from the resultant output signal of the digital filter, a portion of waveform which is indicated by the window generated by the window generating section and for measuring at least a peak-to-peak amplitude of the portion of waveform. | 09-18-2008 |
20080294386 | Method and Device For Interference Suppression in Electromagnetic Multi-Channel Measurement - The present invention recognises and eliminates from a biomagnetic measurement signal interferences whose source is disposed in the direct vicinity of an object being measured. The invention utilises the SSS method that can be used to separate from one another the signals associated with the internal and external sources of a set of measurement sensors by calculating two series developments. The sources to be examined in the invention and disposed in the so-called intermediate space produce a component to both of the developments, and can, therefore, be detected by means of an analysis to be performed in a time domain. This division into components can be made using the Principal Component Analysis (PCA), the Independent Component Analysis (ICA) or the Singular Value Decomposition. Finally, the clarified interferences in the intermediate space can be eliminated from the measured signal using, for example, the linear algebraic orthogonal projection. | 11-27-2008 |
20090030654 | Noise Suppression System, Sound Acquisition Apparatus, Sound Output Apparatus, and Computer-Readable Medium - The sound acquisition apparatus broadcasts a sound “output notice request” through a communication network. In response to the request by the sound acquisition apparatus, the sound output apparatus gives notification of starting a sound output operation, the sound acquisition apparatus requests the sound output apparatus to transfer “output sound data”. The sound output apparatus then transfers “output sound data” representing the sound outputted by its own speaker to the sound acquisition apparatus in response to this request. The sound acquisition apparatus then suppresses a noise component from sound data acquired through a microphone using the transferred “output sound data”. | 01-29-2009 |
20090187383 | Noise-Reduction Metrology Models - The invention can provide apparatus and methods for processing wafers using Noise-Reduction (N-R) metrology models that can be used in Double-Patterning (D-P) processing sequences, Double-Exposure (D-E) processing sequences, or other processing sequences. | 07-23-2009 |
20090192765 | Techniques for Filtering Systematic Differences from Wafer Evaluation Parameters - A method, system and computer program product for filtering systematic differences from wafer evaluation parameters provides an efficient visual display and numerical map technique for observing wafer-level process variation. Measurement data is gathered from electronic circuits at multiple positions within multiple regions on one or more wafers and parameters are computed from the measurement data, which may be the measurement data values themselves. The set of parameters is filtered for expected systematic variation by computing a set of normalization values from the set of parameters and normalizing the data according to the normalization values. The normalized parameter set is then either presented in a visual display, e.g., by color mapping, or arranged in a numerical map of parameter value by location. | 07-30-2009 |
20090204372 | DUAL CIRCULARLY POLARIZED ANTENNA - An antenna includes a waveguide having an aperture at a first end and a conducting component at a second end, the conducting component shorting the waveguide and a first set of two orthogonal dipoles, fed in quadrature, the orthogonal dipoles located near the aperture of the waveguide operating close to its dominant mode cut off frequency. | 08-13-2009 |
20090259437 | NOISE MEASUREMENT IN VIDEO IMAGES - A method and apparatus are disclosed wherein the horizontal and vertical variances of the pixels of an image are determined to calculate a noise measurement in a received image. | 10-15-2009 |
20090259438 | RELATIVE NOISE - Relative noise is a single scalar value that is used to predict the maximum value of the expected noise at any point and is calculated from the measured signal and a mathematical noise model. The mathematical noise model is selected or estimated from an observation that includes statistical and/or numerical modeling based on a population of measurement points. An absolute noise for a plurality of points of the measured signal is estimated. An array of values is calculated by dividing each of a plurality of points of the absolute noise by a corresponding expected noise value calculated from the mathematical noise model. The relative noise is calculated by taking a standard deviation of a plurality of points of the array. The relative noise can be used to calculate scaled background signal noise, filter regions, denoise data, detect false positives from features, calculate S/N, and determine a stop condition for acquiring data. | 10-15-2009 |
20090259439 | METHOD AND SYSTEM FOR THE DETECTION AND/OR REMOVAL OF SINUSOIDAL INTERFERENCE SIGNALS IN A NOISE SIGNAL - A method for removing sinusoidal interference signals from a noise signal. The method includes transforming a measured signal (x(t), x(μ·Δt)), which is composed of a limited number of sinusoidal interference signals (A | 10-15-2009 |
20090276189 | Estimating Noise at One Frequency by Sampling Noise at Other Frequencies - A method, apparatus and computer program for improving the signal-to-noise ratio of a signal S(t), S(t) containing Signal and noise, are disclosed. A measurement of S(t) at a frequency-of-interest is obtained. Noise measurements of S(t) at one or more noise frequencies where the Signal portion of S(t) is expected to be small are obtained. The noise at the frequency-of-interest is estimated using the noise measurements at the one or more noise frequencies. The estimated noise is subtracted from the measurement of S(t) at the frequency-of-interest. | 11-05-2009 |
20090326870 | SYSTEM AND CHARACTERIZATION OF NOISE SOURCES USING ACOUSTIC PHASED ARRAYS AND TIME SERIES CORRELATIONS - A method for detecting the presence of a noise signal within a noise measurement field, where the noise measurement field includes a noise signal emanating from a noise source, and where the noise signal is mixed with extraneous noise existing within the noise measurement field. The method involves using a plurality of acoustic transducers arranged in a plurality of arrays to monitor the noise measurement field at a plurality of spatially separated locations. Outputs of the transducers are sampled to generate time series data. The time series data is processed to identify whether the noise signal is present. | 12-31-2009 |
20090326871 | SYSTEMS AND METHODS FOR ARTIFACT DETECTION IN SIGNALS - According to embodiments, a method and system for artifact detection in signals is disclosed. The artifacts may take the form of movement artifacts in physiological (e.g., pulse oximetry) signals. Artifacts in the wavelet space of the physiological signal may be removed, replaced, ignored, filtered, or otherwise modified by determining the energy within a predefined moving area of the wavelet scalogram, comparing the determined energy within the predefined moving area of the wavelet scalogram to a threshold value, and masking at least one area of artifact in the wavelet scalogram based, at least in part, on the comparison. From the enhanced signal, physiological parameters, for example, respiration, respiratory effort, pulse, and oxygen saturation, may be more reliably and accurately derived or computed. | 12-31-2009 |
20100010780 | Method for signal denoising using continuous wavelet transform - The present invention relates to a novel method for signal denoising utilizing a continuous wavelet transform. The method preferably utilizes derivatives of Gaussian functions. | 01-14-2010 |
20100100359 | Sensor Mapping - Techniques, systems and computer program products are disclosed for providing sensor mapping. In one aspect, a method includes receiving input from a user. The received input includes at least one of motion, force and contact. In addition, a sensor signal is generated based on the received input. From a choice of data structures a data structure associated with a selected application having one or more functions is identified. The data structure indicates a relationship between the generated sensor signal and the one or more functions of the selected application. The generated sensor signal is selectively mapped into a control signal for controlling the one or more functions of the selected application by using the identified data structure. | 04-22-2010 |
20100161285 | Method and Device for Acoustic Length Testing of Compressor - Computer system and method for determining frequencies of various components of a volume choke volume dampener to be attached to a compressor. The method includes determining a sound spectrum of a cavity of the compressor without attaching the dampener to the compressor; calculating an acoustic wavelength of the cavity; receiving a length of a proximal nozzle of the dampener; and calculating, based on the acoustic wavelength of the cavity and the length of the proximal nozzle of the dampener, multiple order frequencies associated with the proximal nozzle of the dampener and the cavity of the compressor, wherein the proximal nozzle of the dampener is proximal to the cavity of the compressor when the dampener is attached to the compressor. | 06-24-2010 |
20100169052 | Apparatus And Method For High Resolution Measurements For Downhole Tools - An apparatus and a method for reducing phase noise in measurement signals from a sensor are provided. The apparatus and method, in one aspect, may use a multiphase counter to obtain a count for each sensor signals time cycle and a filter to reduce noise from the obtained counts. A suitable reference frequency, including the reference frequency of the sensor, may be utilized by the multiphase counter. | 07-01-2010 |
20100191509 | METHOD AND APPARATUS FOR SUPPRESSING POWER FREQUENCY COMMON MODE INTERFERENCE - An apparatus for suppressing power frequency common mode interference in a bioelectrical signal measuring system includes a driving circuit configured to amplify and change the phase of a common mode interference signal to produce a first driving signal, wherein the common mode interference signal is extracted from a plurality of first electrodes attached to a patient; phase compensating and processing circuitry electrically connected to the driving circuit for receiving the first driving signal, the phase compensating and processing circuitry configured to produce a second driving signal by phase-compensating the first driving signal based on a characteristic value of power frequency interference in a bioelectrical signal acquired through the plurality of first electrodes; and a switch to receive the first driving signal and the second driving signal, the switch configured to selectively switch between providing the first driving signal and providing the second driving signal to a second electrode attached to the patient. | 07-29-2010 |
20100274532 | SIGNAL SENSING APPARATUS AND METHOD THEREOF - A signal sensing apparatus eliminating noise is provided, having at least a first class signal sensor for receiving at least a first class signal, at least a second class signal sensor for receiving at least a second class signal, a signal receiver for receiving a signal, wherein the signal comprises at least a noise; and a master-slave multiple noise eliminator for performing a multiple adaptive filter algorithm to eliminate noise in the signal by using one of the at least a first class signal or second class signal as a master signal and one of the at least a first class signal or second class signal not used as a master signal as a slave signal. | 10-28-2010 |
20100312523 | SYSTEMS AND METHODS OF REDUCING A COMPONENT OF A SIGNAL CAUSED BY VIBRATION - A vibration detection circuit. The circuit includes an accelerometer, a combining filter, an amplifier, and an analog to digital converter. The accelerometer generates one or more signals indicative of movement along an axis. The combining filter filters a component of the one or more signals not associated with movement and combines the components of the one or more signals indicative of movement to create a combined signal. The amplifier amplifies the combined signal and creates an amplified signal. The analog to digital converter converts the amplified signal into a digital value. | 12-09-2010 |
20110029288 | Method And Apparatus For Improving Noise Discrimination In Multiple Sensor Pairs - Noise discrimination in signals from a plurality of sensors is conducted by enhancing the phase difference in the signals such that off-axis pick-up is suppressed while on-axis pick-up is enhanced. Alternatively, attenuation/expansion are applied to the signals in a phase difference dependent manner, consistent with suppression of off-axis pick-up and on-axis enhancement. Nulls between sensitivity lobes are widened, effectively narrowing the sensitivity lobes and improving directionality and noise discrimination. | 02-03-2011 |
20110066403 | METHOD FOR DETECTING AND FILTERING A RANDOM NOISE SIGNAL - A random noise signal detecting and filtering method includes: (a) calculating a difference value of data currently being input from a sensor in comparison with previous data stored in a register; (b) comparing the calculated difference value with a critical value; (c) determining whether the calculated difference value is greater than a maximum critical value or less than a minimum critical value; and (d) if the calculated difference value is greater than the maximum critical value or less than the minimum critical value, determining the current data be constitute a random signal and substituting the previous data for the current data. | 03-17-2011 |
20110172970 | APPARATUS FOR REMOVING THE PARTIAL DISCHARGE NOISE OF AN ELECTRICAL POWER FACILITY AND APPARATUS FOR DETECTING A PARTIAL DISCHARGE GENERATED SECTION - The present invention relates to an apparatus for removing the partial discharge (PD) noise of an electrical power facility that is capable of quickly removing noise from a partial discharge signal generated from the electrical power facility such as a gas insulated switchgear (GIS) and the like, and an apparatus for detecting a partial discharge generated section. The apparatus for removing the partial discharge noise of an electrical power facility includes: a partial discharge signal detection unit for detecting a partial discharge signal of the electrical power facility, and detecting and outputting peaks of the partial discharge signal at preset time intervals; a noise signal detection unit for detecting a noise signal from outside the electrical power facility, and detecting and outputting peaks of the noise signal at preset time intervals; | 07-14-2011 |
20110213592 | CAPACITIVE ULTRASONIC TRANSDUCER AND ENDO CAVITY ULTRASONIC DIAGNOSIS SYSTEM USING THE SAME - A capacitive ultrasonic transducer (c-MUT) comprising a silicon substrate and a transducer element which comprises transducer cells, each of which is constituted by a first electrode equipped on the top surface of the silicon substrate, a second electrode placed opposite to the first electrode with a predetermined gap therefrom and a membrane for supporting the second electrode, wherein a trench is equipped between the adjacent transducers and a conductive film is formed in the trench. | 09-01-2011 |
20110238382 | OPTIMIZED METHOD FOR LID BIOSENSOR RESONANCE DETECTION - An optical interrogation system is described herein that can interrogate a label-independent-detection (LID) biosensor and monitor a biological event on top of the biosensor without suffering from problematical parasitic reflections and/or problematical pixelation effects. | 09-29-2011 |
20120109585 | Method and System to Account for Angle of Attack Effects in Engine Noise Shielding Tests - There is provided a method to account for aircraft angle of attack effects in engine noise shielding in aircraft configurations having one or more engines mounted above a wing or a lifting body. The method includes computing a local flow field from a known standard full aircraft configuration oriented at a nonzero angle of attack. The method further includes computing a mean flow field in a test dataset from a small scale aircraft model test configuration oriented at a zero angle of attack. The method further includes matching the local flow field with the mean flow field to identify a selected noise measurement dataset. The method further includes rotating the selected noise measurement dataset in a far field directivity rotation angle to match the nonzero angle of attack, thus resulting in engine noise shielding results for the full aircraft configuration at the nonzero angle of attack. | 05-03-2012 |
20120166145 | Method and a Touch Sensing Device for Implementing the Method - The present invention relates to a method for reducing noise in a signal sensing a bending wave propagating in an object comprising the steps of: receiving a sensed signal representative of a plurality of locations of the object, and fitting a function satisfying bending wave propagation properties to the sensed signals, thereby reducing noise contributions to the sensed signals not satisfying the bending wave propagation properties. By doing so, noise contributions not satisfying the wave propagation properties can be suppressed from the sensed signal, thereby improving the signal-to-noise ratio. | 06-28-2012 |
20120215496 | SYSTEMS AND METHODS FOR REPLACING SIGNAL ARTIFACTS IN A GLUCOSE SENSOR DATA STREAM - Systems and methods for minimizing or eliminating transient non-glucose related signal noise due to non-glucose rate limiting phenomenon such as interfering species, ischemia, pH changes, temperatures changes, known or unknown sources of mechanical, electrical and/or biochemical noise, and the like. The system monitors a data stream from a glucose sensor and detects signal artifacts that have higher amplitude than electronic or diffusion-related system noise. The system processes some or the entire data stream continually or intermittently based at least in part on whether the signal artifact event has occurred. | 08-23-2012 |
20120323533 | FILTERS FOR SPECTRAL ANALYSIS DATA - Cosmic spike filters are provided, which remove noise spikes in spectral data. Spikes are eliminated by locating, smoothing and filtering the spikes using replicates to improve the accuracy of the spike detection process compared to when only one replicate is used. Cosmic spike filters are also provided that combine a data collection approach and a statistical approach to remove cosmic spike noise from the collected signal without distorting the true signal. Still further, a statistical approach is provided to identify and remove negative peaks from a spectrum, where the negative peaks are caused by bad pixels in a charge coupled device. | 12-20-2012 |
20130024163 | Systems and Methods for Early Stage Noise Compensation in a Detection Channel - Various embodiments of the present invention provide data processing circuits that include: a data detector circuit, a data decoder circuit, and a modification circuit. The data detector circuit is operable to apply a data detection algorithm to a data input to yield a detected output. The data decoder circuit is operable to apply a data decode algorithm to a decode input to yield a decoded output. The decode input is selected between at least the detected output, and a modified version of the detected output. The modification circuit is operable to receive the detected output and to provide the modified version of the detected output. | 01-24-2013 |
20130060528 | SYSTEM AND METHOD FOR DETERMINING A QUANTITY OF BULK MATERIAL - The quantity of bulk material in a pile of bulk material is determined using one or more laser scanners that scan the surface of the pile. The signal generated by the scanner(s) is transmitted to a remote computation system that uses the received signals to calculate the quantity of material in the pile. The calculated quantity can be expressed as a volume, a mass or a financial value. The calculated quantity can be sent to an end user either automatically or upon receipt of a request from the end user. The remote computation system can receive and process scanning signals from scanners that mounted to scan the surfaces of different piles of bulk material. The system can also include a server local to the scanners. | 03-07-2013 |
20130110467 | ULTRASENSITIVE BIOLOGICAL AND CHEMICAL DETECTION USING SURFACE PLASMON RESONANCE | 05-02-2013 |
20130262037 | PARTIAL DISCHARGE NOISE SEPARATION METHOD - The partial discharge noise separation method uses Independent Component Analysis (ICA) for de-noising partial discharge (PD) test signals having a noise signal component and a partial discharge component. Assuming that the noise signal component and the PD signal component are both statistically independent of each other and non-Gaussian, the ICA algorithm separates the noise component from the PD signal component from two partial discharge test signals acquired from two separate couplers per phase that are connected to the windings of a three-phase rotating machine. | 10-03-2013 |
20130311141 | SIGNAL DENOISING METHODS FOR A CHARGE DETECTION FREQUENCY-SCAN/VOLTAGE-SCAN QUADRUPOLE/LINEAR/RECTILINEAR ION TRAP MASS SPECTROMETER - A signal denoising method for a frequency-scan ion trap mass spectrometer includes reading a signal raw data array observed in the spectrometer. The signal raw data array is processed by Boxcar averaging method to obtain a first signal array. Then the first signal array is processed by a harmonic interference cancellation method to obtain a second data array. Next the second signal array is processed by a radio frequency interference reduction method and a third signal array without the background induced from driving voltage of ion trap is reconstructed according to the second signal array. | 11-21-2013 |
20130317783 | NEAR-FIELD NOISE CANCELLATION - Systems and methods for cancelling a near-field noise signal. The methods generally involve: receiving ( | 11-28-2013 |
20130332116 | Electron Microscope and Method of Operating the Same - An electron microscope and method of operating an electron microscope ( | 12-12-2013 |
20140088923 | SYSTEMS AND METHODS TO PROCESS DATA IN CHROMATOGRAPHIC SYSTEMS - A system and method for processing data in chromatographic systems is described. In an implementation, the system and method includes processing data generated by a chromatographic system to generate processed data, analyzing the processed data, and preparing and providing results based on the processed data. | 03-27-2014 |
20140100823 | SYSTEMS AND METHODS FOR SPECTROSCOPIC MEASUREMENT OF A CHARACTERISTIC OF BIOLOGICAL TISSUE - A method and system for spectroscopic measurement of a characteristic of a biological tissue is provided. The method includes the steps of: (1) using at least one light source to emit light that penetrates the biological tissue; (2) using at least one light detector to detect light emitted by the at least one light source and passed through the biological tissue, and to convert the detected light into a detection signal, the detection signal including an unwanted noise component; and (3) using a processor to process the detection signal and to determine an adjusted peak-to-peak amplitude value that is representative of an amplitude of the detection signal adjusted for the unwanted noise component. | 04-10-2014 |
20140207418 | Real-Time Resampling of Optical Coherence Tomography Signals Using a Field Programmable Gate Array - A signal processing system implemented on a Field Programmable Gate Array (FPGA) operates according to a low frequency K-Clock to sample Optical Coherence Topography (OCT) signals, as opposed to relying on a high frequency K-Clock to obtain the same information. A resampler is used to resample the OCT signal uniformly in the optical frequency domain. The resampling may be performed by extracting instantaneous phase information from a low-frequency digitized K-Clock signal, unwrapping the extracted phase information, multiplying the unwrapped extracted phase information with an interpolation factor to obtain recalculated phase information, determining one or more integer crossing points corresponding to the recalculated phase information, and interpolating one or more values of the OCT signal based on the one or more integer crossing points. The integer crossing points may represent points in phase divisible by 360 degrees, within the range of points in phase defined by the recalculated phase information. | 07-24-2014 |
20140222382 | APPARATUS AND METHOD FOR REMOVING NOISE FROM A BIOELECTRICAL SIGNAL - A method and apparatus for removing noise from a bioelectrical signal are provided. A main analog signal from a bioelectrical test probe and a gating signal are received. A main data stream associated with the main analog signal from the bioelectrical test probe is developed. An adaptive noise cancellation (ANC) unit operates to develop an output data stream by removing noise components from the main data stream in accordance with the reference data stream. If the gating signal indicates that the main analog signal was acquired during a period of bioelectrical activity then the ANC unit operates in a fixed mode, and if the gating signal indicates that the main analog signal was acquired during a period without bioelectrical activity then ANC unit operates in an adaptive mode. | 08-07-2014 |
20140288885 | SIGNAL PROCESSING DEVICE, PULSE WAVE MEASURING APPARATUS, AND SIGNAL PROCESSING METHOD - A signal processing device includes: a first acquisition unit that acquires a first signal indicating a pulse wave of a living body from a first measuring unit that measures the pulse wave; a second acquisition unit that acquires a second signal indicating the pulse wave of the living body from a second measuring unit that measures the pulse wave at different sensitivities from the first measuring unit; an estimation unit that estimates a ratio of sensitivity of the first measuring unit to sensitivity of the second measuring unit from a first spectrum of the first signal and a second spectrum of the second signal; and a subtraction unit that subtracts the second spectrum from the first spectrum so as to cancel noise included in the first spectrum and the second spectrum, using the ratio estimated by the estimation unit. | 09-25-2014 |
20140316746 | REAL-TIME SIGNAL PROCESSING SYSTEM AND METHOD BASED ON MULTI-CHANNEL INDEPENDENT COMPONENT ANALYSIS - A real-time signal processing system and method based on multi-channel independent component analysis (ICA). A one-pass recursive ICA processor uses a computation module to perform multi-channel ICA on a set of first data to generate a plurality of second data and third data. A noise removing module uses the computation module to identify noise in the second data and remove the identified noise to generate a plurality of fourth data. A reconstruction module uses the computation module to reconstruct the set of first data based on the fourth data and the third data to generate a plurality of fifth data. The one-pass recursive ICA processor, the noise removing module, the reconstruction module and the computation module are all implemented on a single chip, such that the one-pass recursive ICA processor, the noise removing module and the reconstruction module share the same computation module to save hardware resources. | 10-23-2014 |
20140358489 | NON-LINEAR PARAMETER MEASURING METHOD AND SYSTEM STRONG TO NOISE - A nonlinearity parameter measuring method and system is configured to separately process a signal of a fundamental wave and second harmonic wave that went through a probe attached to a specimen using a circuit including an analogue band pass filter and intermediate frequency amplifier, and minimize the effects caused by noise, thereby measuring an exact nonlinearity parameter. | 12-04-2014 |
20150012249 | Minute Signal Detection Method and System - In an environment in which signal-to-noise is poor, a method and a system configuration for power-saving, low-cost, and general minute signal detection are provided. The system includes a circuit that converts and amplifies an input signal, a nonlinear analog front-end circuit that determines the existence of a minute signal from the input signal and that outputs information on the existence of the same as an event signal, an analog-to-digital-conversion circuit that drives operation-mode control based on the event signal and performs analog-to-digital conversion on the converted-and-amplified input signal, a data-transfer circuit that drives the operation-mode control by the event signal and transfers the analog-to-digital converted signal, a digital-signal-processing circuit that drives the operation-mode control by the event signal and performs digital-signal processing on the signal transmitted from the data-transfer circuit and detects the signal, and a parameter-control circuit that controls a characteristic parameter of the nonlinear analog front-end circuit. | 01-08-2015 |
20150057980 | STRUCTURES AND METHODS FOR RF DE-EMBEDDING - Electrical structures, methods, and computer program products for radio frequency (RF) de-embedding are provided. A structure includes a first test device, a first through structure corresponding to the first test device, and a first open structure corresponding to the first test device. The structure also includes a second test device having at least one different physical dimension than the first test device but otherwise identical to the first test device, a second through structure corresponding to the second test device, and a second open structure corresponding to the second test device. A method includes determining a first electrical parameter of the first test device in a first DUT structure and a second electrical parameter of the second test device in a second DUT structure based on measured electrical parameters of the first and the second DUT structures, through structures, and open structures. | 02-26-2015 |
20150066438 | Low-power data acquisition system and sensor interface - A sensor interface includes on-chip relaxation oscillator circuit and a PLL that operate cooperatively to generate a highly accurate clock signal on-chip using low-power components. A photodiode generates a current signal based on an optical signal that is representative of a sensor signal. An ADC that operates based on the highly accurate clock signal generates a digital signal based on the current signal generated by the photodiode, and a processor processed the digital signal to estimate sensor data within the sensor signal. Examples of characteristics that may be sensed can include environmental characteristics (e.g., temperature, humidity, barometric pressure, etc.) and/or biomedical characteristics (e.g., body temperature, heart rate, respiratory rate, blood pressure, etc.). In desired, an amplifier processes the photodiode-provided current signal before it is provided to the ADC. Also, one or more CDACs that generate feedback currents may be used to reduce noise sensitivity of the sensor interface. | 03-05-2015 |
20150297141 | METHOD FOR IMPROVING THE SIGNAL TO NOISE RATIO OF A WAVE FORM - A method for improving the signal to noise ratio of an EEG signal in which a wavelet packet decomposition having a plurality of levels is first applied to a time slice of the EEG signal. A default signal is set to the first wavelet packet and a default peak response is then calculated for the first wavelet node. An update signal is set to the default signal combined with another of the wavelet nodes and an update peak response signal is then calculated of the update signal. If the update peak response signal exceeds the default peak response, the default peak response is set equal to the update peak response and the default signal is set equal to the update signal. Otherwise, the value of the current node is set to zero which effectively eliminates the signal data of the current wavelet node. These steps are reiterated for all of the wavelet nodes and, thereafter, a composite waveform of the EEG signal is reconstructed from the non-zero wavelet nodes. | 10-22-2015 |
20150323640 | METHOD AND SYSTEM FOR SPECTRAL LEAKAGE REMOVAL IN DAC TESTING - System and method for processing a signal sampled from an output of a digital-analog converter. The method comprises: (a) transforming the input signal from time domain to frequency domain to obtain a signal having a plurality of bins; (b) estimating properties of a largest amplitude bin, except for direct current (DC) bin, in the input signal; (c) performing signal reconstruction in time domain based on the estimated properties to generate a reconstructed signal; (d) subtracting the estimated signal from the input signal to get a residual signal; (e) repeating steps (a)-(d) till a predetermined number of bins have been processed; (f) adding all the reconstructed signals and the last residual signal together to generate a sum signal; and (g) transforming the sum signal from the time domain to the frequency domain. | 11-12-2015 |
20150330832 | Method and Apparatus for Rapid Acquisition of Elasticity Data in Three Dimensions - Interpolation of ultrasound data at regular grid locations is provided by simultaneously optimizing interpolated data according to fidelity of interpolation of the voxel data to actual measured spatial data and according to a gradient of the interpolated data. This process is made amenable to real-time processing by limiting the range of interpolation to produce a sparse interpolated matrix that may be readily inverted. Artifacts and inefficiencies from successive stages of interpolation and data smoothing are thereby avoided. | 11-19-2015 |
20150369864 | SENSOR DATA DAMPING - Sensor data damping is described, for example, to remove jitter from sensor data to enable control of a computing device. In various examples damped sensor data is compared with a threshold and clamped to the threshold in the case a difference between the sensor data and the damped sensor data is above the threshold. In various examples the damped data has low-latency and is used to control a downstream system such as a game system, natural user interface, robotic system, augmented reality system or other system. In examples, the threshold is adjusted on the fly on the basis of any one or more of: state data from the downstream system, frequency of clamping, velocity of the sensor data. In some examples, the sensor data comprises human/animal joint positions from a depth sensor. | 12-24-2015 |
20160004227 | NOISE DETERMINATION DEVICE - A noise determination device is provided that determines the presence of noise on an input signal with a constant value that is output from an external device. The noise determination device includes a sampling unit that performs three samplings on the input signal, a sampling-interval setting unit that sets an interval between a first one and a second one of the samplings to have a value that is different from an integral multiple of the period of the periodic noise, and sets an interval between the second one and a third one of the samplings to be equal to or larger than an interval that is large enough to fully attenuate the periodic noise, and a noise determination unit that determines that the noise is not superimposed on the input signal only when all values acquired by the first, second, and third samplings match one another. | 01-07-2016 |
20160025478 | Real Time FPGA Resampling for Swept Source Optical Coherence Tomography - Real-time swept source OCT data is most often sampled using a specially cut hardware k-clock. The present invention involves mathematically resampling signals within an FPGA-based data acquisition board based on data sampled from a wide free spectral range reference interferometer. The FPGA can then multiply up the reference clock rate to achieve greater imaging depth. The Nyquist fold-over depth can thus be programmed from a standard reference to an arbitrary depth, much as PLL frequency synthesizer can produce many frequencies from a standard stable reference. The system is also capable of real-time performance. | 01-28-2016 |
20160061969 | METHOD OF SPECTRAL DATA DETECTION AND MANIPULATION - A method is for the deconvolution of a statistically noisy spectral dataset is described comprising the steps of: a. obtaining a spectroscopically resolved dataset of measured flux from a sample that has been collected using a suitable detector radiation system; b. generating an initial estimate of the true spectrum; c. modifying the estimate of the true spectrum by a response function of the detector used to collect the measured flux dataset so as to generate an estimate flux dataset; d. computing a merit value for statistical fit between the measured flux dataset and the estimate flux dataset; e. applying a perturbation to a value of the estimate of the true spectrum; f. repeating steps c and d to the estimate of the true spectrum so changed, accepting the change to the estimate of the true spectrum if the resultant merit value indicates an improvement or if the resultant merit value indicates a deterioration of less than a limit margin, and rejecting the change to the estimate of the true spectrum if the resultant merit value indicates a deterioration of more than a limit margin; and g. repeating steps e and f for each further value of the estimate of the true spectrum to obtain a modified estimate of the true spectrum; h. repeating steps c to g for successive modified estimates of the true spectrum while reducing the limit margin. More completely, a method of detection of a spectrally resolved radiation dataset is described embodying the above. | 03-03-2016 |
20160108724 | SENSOR ARRAY NOISE REDUCTION - Sensor array noise reduction is provided. In one possible implementation a logging and control system includes a sensor array noise reduction manager configured to receive measurements from two or more sensors and apply a selected demixing vector to filter one or more noise sources from the measurements and improve a signal to noise ratio of a telemetry signal in the measurements. In another possible implementation a sensor array noise reduction manager for improving a signal to noise ratio of a signal includes a sensor interface configured to receive the signal, which includes information associated with an operating condition, from two or more sensors. The sensor array noise reduction manager also includes a noise reduction module to simultaneously remove noise associated with one or more noise sources from the received signal through use of a demixing vector. | 04-21-2016 |
20160142081 | SYSTEM AND METHOD FOR CONTROLLING LEARNING PERIOD FOR ADAPTIVE NOISE CANCELLATION - A data acquisition system coupled to a mains power source and a method of operating the data acquisition system a disclosed. A test probe is configured to be coupled to a subject, and an analog to digital converter converts a signal from the test probe to samples. A noise replica generator generates estimates of noise in the samples, a noise removal block removes from each sample an estimate of noise therein. When the subject is undergoing stimulation, the samples are provided to only the noise removal block. When the subject is not undergoing stimulation, the samples are provided to both the noise replica generator and the noise removal block. | 05-19-2016 |
20160170058 | METHOD AND SYSTEM OF SEISMIC DATA PROCESSING | 06-16-2016 |
20160187219 | METHODS AND SYSTEMS TO CHARACTERIZE NOISES SENSED BY A KNOCK SENSOR - A method of characterizing a noise signal includes receiving a noise signal sensed by a knock sensor coupled to a reciprocating device, preconditioning the noise signal to derive a preconditioned noise signal, applying an ADSR envelope to the preconditioned noise signal, extracting tonal information from the preconditioned noise signal, and creating a fingerprint of the noise signal based on the ADSR envelope, the tonal information, or a combination thereof. | 06-30-2016 |
20160249862 | EPSILON-TUBE FILTER FOR BLUNT NOISE REMOVAL | 09-01-2016 |
20160254119 | PULSE PROCESSING | 09-01-2016 |
702193000 | By threshold comparison | 4 |
20080270083 | Method of Processing Mass Spectrometry Data - A method of processing Fourier Transform Mass Spectrometry (FTMS) data comprises carrying out a Fourier Trans-form of a part of a time domain transient and identifying from that transformed data signal peaks representative of the presence of ions. Once the peaks have been identified, the full transient is then transformed, and the peaks identified in the partial transient transform are used to locate true peaks in the transformed full transient. The number of ‘false’ peaks resulting from random noise has been found to correlate to the resolution, so that using a partial transient to identify true peaks reduces the risk of false peaks being included; nevertheless this information can then be applied to the full data set when transformed. As an alternative, different parts of the full data set can be transformed and then correlated; because any noise will be random, false peaks should occur at different places in the two partial transforms. | 10-30-2008 |
20100145660 | MEMS SENSOR WITH BUILT-IN SELF-TEST - A method and system for testing a MEMS sensor element during operation of a MEMS sensor system in one embodiment includes a test signal generator configured to generate a broad frequency band test signal, and a verification signal substantially identical to the test signal, a microelectrical-mechanical system (MEMS) sensor element operatively connected to the test signal generator for generating a sensor output in response to the test signal, a comparison component configured to generate an evaluation signal output based upon the verification signal and the test signal, and an evaluation circuit operatively connected to the comparison component and configured to identify a mismatch between the verification signal and the sensor output based upon the evaluation signal. | 06-10-2010 |
20130311142 | RANDOM COINCIDENCE REDUCTION IN POSITRON EMISSION TOMOGRAPHY USING TANGENTIAL TIME-OF-FLIGHT MASK - A method and apparatus for reducing random events in positron emission tomography (PET) list mode data, the method including the steps of obtaining, for a PET scanner having a given reconstruction field of view (FOV), time-of-flight (TOF) prompt list-mode count data that includes TOF information, the TOF prompt list-mode count data including a plurality of entries; and filtering the obtained prompt list-mode count data by removing those entries in the obtained prompt list-mode count data that represent emission points lying outside a tangential TOF mask to obtain filtered list-mode count data. | 11-21-2013 |
20140372081 | REAL TIME ARTIFACT REMOVAL - Noise artifacts may be removed from a signal utilizing functional near infrared (fNIR) spectroscopy measurement techniques. The noise removal may be accomplished in field conditions, such as, for example, in an operating room setting. In an example configuration, to remove noise artifacts, independent component analysis (ICA) and principal component analysis (PCA) may be implemented in a procedure that utilizes a dark current measurement as a reference signal. The use of the combined ICA/PCA analysis and dark current measurement reference signal allows noise to be removed on a per channel basis, thus providing an effective noise removal procedure and allowing for a single active measurement channel. | 12-18-2014 |
702194000 | By mathematical attenuation (e.g., weighting, averaging) | 16 |
20090248367 | METHOD AND APPARATUS FOR MEASURING RAMAN SIGNALS - A method of measuring Raman signals comprises: an analyte placing step of placing an analyte on a detection surface of a microstructure plate which generates an enhanced electric field when irradiated with excitation light; an irradiating step of irradiating the detection surface with the excitation light so that the enhanced electric field is generated around the detection surface and light is emitted from the analyte and the detection surface to be enhanced by the generated enhanced electric field; a Raman signal obtaining step of detecting the enhanced light to obtain a Raman signal emitted from the analyte and a background signal for use as a reference, the Raman signal and the background signal having respective intensities; and a normalizing step of normalizing the Raman signal from the analyte by dividing the intensity of the Raman signal from the analyte by the intensity of the background signal obtained as the reference. | 10-01-2009 |
20110144953 | COMPENSATION OF ELECTROMAGNETIC INTERFERING FIELDS - A system for compensating electromagnetic interfering fields is provided that includes two triaxial magnetic field sensors for outputting real sensor signals; six compensation coils, which are arranged as a cage around an object to be protected, and may individually be actuated; a control unit having six inputs, and six outputs, and a digital processor receiving the sensor signals on the input side, and processing the signals to control signals for the compensation coils. The real sensor signals are converted to virtual sensor signals by a first matrix multiplication for mapping the interfering fields at the location of the object. The virtual sensor signals are made to modified signals by an operator describing the controller structure. The modified signals are converted to real control signals by a second matrix multiplication, which control signals are individually fed to the six compensation coils. | 06-16-2011 |
20130024164 | METHOD FOR ROLLING BEARING FAULT DETECTION BASED ON ENHANCING STATISTICAL ASYMMETRY - A method for digital processing of vibration signals from rolling bearings in rotating machines is presented, allowing subsequent fault detection with high reliability. A linear, adaptive filter is applied to the acquired vibration signal and iteratively tuned to increase the statistical asymmetry of its output. In this process, the filter removes phase- and amplitude distortion from underlying fault impulses. Furthermore, suppression of sinusoidal disturbances is simultaneously achieved with high robustness to measurement noise. The result is a processed signal from which rolling bearing defects are more easily detected. | 01-24-2013 |
20130080119 | SYSTEMS AND METHODS FOR GENERATING ELECTROMAGNETIC INTERFERENCE FREE LOCALIZATION DATA FOR AN IN-VIVO DEVICE - An electromagnetic localization signal may be sensed by an electromagnetic field sensor in an in-vivo device with an electromagnetic field interference that is superimposed on the electromagnetic localization signal. The electromagnetic field interference may be filtered by outputting, by the electromagnetic field sensor, an alternating signal that represents, or in response to, the electromagnetic localization signal; sampling a first (e.g., positive) portion of the alternating signal during a first sampling window or period to obtain a first set of samples, sampling a second (e.g., negative) portion of the alternating signal during a second sampling window or period to obtain a second set of samples; and calculating a number, N | 03-28-2013 |
20130204582 | Systems and Methods for Feature Detection in Mass Spectrometry Using Singular Spectrum Analysis - Singular spectrum analysis is used to detect a feature from mass spectrometry data. A plurality of scans of a sample is performed producing mass spectrometry data using a spectrometer. A singular spectrum analysis is performed on the mass spectrometry data using a fixed window width in which one or more components other than the highest ranked component are grouped in a set and the one or more components grouped in the set are summed producing reconstructed data using the processor. A feature of the mass spectrometry data is detected by analyzing an aspect of the reconstructed data using the processor. Analyzing an aspect of the reconstructed data includes using pairs of zero crossings in the reconstructed data to detect bounds on a location of the feature in the mass spectrometry data. | 08-08-2013 |
20140074436 | Noise Detection and Correction Routines - A system for reducing noise in a sensor measurement system includes a noise detector for detecting noise in capacitive to digital conversion measurements; a noise correction module operably coupled to the noise detector and configured to dynamically modify one or more delays associated with a sampling waveform; and a noise filter for filtering the sampling waveform. | 03-13-2014 |
20140236540 | SIGNAL PROCESSING METHOD AND SIGNAL PROCESSING SYSTEM - A signal processing method and a signal processing system are provided. The signal processing method comprises the following steps. An original signal is provided. The original signal is gradually divided to be corresponding a plurality of stages. One high frequency signal and one low frequency signal whose frequency is lower than that of the high frequency signal are corresponding one of the stages. One of the low frequency signals corresponding to one of the stages is divided into another one of the high frequency signals and another one of the low frequency signals corresponding to the next one of the stages. An adjusting signal is obtained by filtering one of the low frequency signals out of another one of the low frequency signals. | 08-21-2014 |
20140330540 | RANDOM BODY MOVEMENT CANCELLATION FOR NON-CONTACT VITAL SIGN DETECTION - A method and system for cancelling body movement effect for non-contact vital sign detection is described. The method begins with sending on a first electromagnetic wave transceiver a first electromagnetic signal with a first frequency to a first side of a body, such as a person or animal. Simultaneously using a second electromagnetic wave transceiver a second electromagnetic signal is sent with a second frequency to a second side of a body, wherein the first frequency and the second frequency are different frequencies. A first reflected electromagnetic signal reflected back in response to the first electromagnetic wave on the first transceiver is received and a first baseband complex signal is extracted. Likewise a second reflected electromagnetic signal reflected back in response to the second electromagnetic wave on the second transceiver is received and a second baseband complex signal is extracted. The first baseband complex signal is mathematically combined with the second baseband complex signal to cancel out a Doppler frequency drift therebetween to yield a periodic Doppler phase effect. | 11-06-2014 |
20150019172 | MAGNETIC RESONANCE IMAGING METHOD AND APPARATUS - A magnetic resonance (MR) tomography aparatus has an array composed of a number n of single coils E | 01-15-2015 |
20150100279 | PROCESSING DATA FROM A DISTRIBUTED FIBRE-OPTIC INTERFEROMETRIC SENSOR SYSTEM - A method of processing data from a distributed fibre-optic interferometric sensor system for measuring a measurand, the system comprising multiple interferometric sensors. The method comprises interrogating two or more of the multiple interferometric sensors to record a raw measurement time series for each of the sensors. The method further comprises calculating a common reference time series as a measure of central tendency of the raw measurement time series from two or more reference sensors, the reference sensors being selected from the multiple interferometric sensors. Finally, the method comprises compensating at least one raw measurement time series from a measurement sensor selected from the multiple interferometric sensors with the common reference time series to produce a compensated measurement time series, the measurement sensor being configured to be sensitive to the measurand. The invention further relates to a distributed fibre-optic interferometric sensor system. | 04-09-2015 |
20150365072 | SYSTEMS AND METHODS FOR EXTENDING FREQUENCY RESPONSE OF RESONANT TRANSDUCERS - Certain implementations of the disclosed technology may include systems and methods for extending a frequency response of a transducer. A method is provided that can include receiving a measurement signal from a transducer, wherein the measurement signal includes distortion due to a resonant frequency of the transducer. The method includes applying a complementary filter to the measurement signal to produce a compensated signal, wherein applying the complementary filter reduces the distortion to less than about +/−1 dB for frequencies ranging from about zero to about 60% or greater of the resonant frequency. The method further includes outputting the compensated signal. | 12-17-2015 |
20160110312 | Method for Reducing Noise in Data-Sets of Harmonic Signals - A method for reducing the noise in data-sets of harmonic signals that include data vectors X of length L, with each data vector X including P harmonic components is described. The method includes the steps of computing a Hankel matrix H by applying the equation (H | 04-21-2016 |
702195000 | Subtracting noise component | 4 |
20090132207 | Fast Low Frequency Jitter Rejection Methodology - Disclosed is a system and related methodology for providing fast low frequency jitter rejection in the measurement of signals under test. A signal under test may be sampled alternately with a reference signal under similar conditions. The resulting sampled signal blocks may then be processed to subtract the known calibrated value of the reference signal from the average signal under test. | 05-21-2009 |
20100125439 | Method of Deep Resistivity Transient Measurement While Drilling - A transient electromagnetic signal is recorded in an earth formation in the presence of a pipe having a finite conductivity. A portion of the signal dominated by the pipe signal is analyzed to determine a functional representation, extrapolated back to a time interval where the formation signal is present and subtracted from the recorded signal to provide a corrected signal. | 05-20-2010 |
20120109586 | MEASURING DEVICE AND MEASURING METHOD FOR CONTINUOUS PHYSICAL QUANTITY - The invention discloses a measuring device and a measuring method for a continuous physical quantity. The measuring device comprises a timing unit for outputting a time base and a time scale; a sampling unit for sampling the continuous physical quantity under control of the time base and at time intervals that meet the Nyquist sampling theorem, and outputting a sampling value; a decision unit for deciding whether the sampling value turns into a transient state from a steady state or turns into the steady state from the transient state; a calculating unit for calculating a steady state value for the sampling value of the sampling unit in the steady state; and an output unit for outputting the start time of the steady state and the steady state value X, and the start time and the sampling value of the transient state according to the result of decision and the time scale. The invention may not only avoid the aliasing and but also reduce the output data volume. | 05-03-2012 |
20130289944 | System and method for signal processing - In one embodiment, a method for reducing signal noise and generating features includes the steps of receiving a discrete signal, transforming the discrete signal, using a processor, into a non-linear feature space, classifying the non-linear feature space, using the processor, into a set of non-linear feature sub-spaces, and performing a mathematical operation, using the processor, on the non-linear feature space and the set of non-linear feature sub-spaces, to produce an output feature set. | 10-31-2013 |