Class / Patent application number | Description | Number of patent applications / Date published |
342091000 | Gain or threshold | 39 |
20080224916 | IN-VEHICLE RADAR DEVICE - An in-vehicle radar device includes: phase storing means | 09-18-2008 |
20080258961 | IN-VEHICLE RADAR SYSTEM - An in-vehicle radar system, which transmits an electric wave toward a target object and measures the distance between a subject vehicle and the target object, based on the electric wave that has been reflected by the target object and is received by the in-vehicle radar system, includes subject vehicle-speed determination means for determining whether or not the subject vehicle is in a halt state or moving at a predetermined speed or lower; transmission-output control means for setting transmission output smaller than that for the case where the subject vehicle is moving, when the subject vehicle-speed determination means detects that the subject vehicle is in a halt state or moving at the predetermined speed or lower; and reception-sensitivity control means for setting a reception gain amount larger than that for the case where the subject vehicle is moving. | 10-23-2008 |
20090021418 | METHOD AND SYSTEM OF INTERFERENCE DETECTION FOR RADAR ALTIMETERS - A method of detecting interference noise at a radar altimeter. The method comprises periodically emitting a pulse from the pulsed radar altimeter, periodically detecting a noise level in a noise gate, and determining if the noise level detected during each noise-level-detection period exceeds a noise threshold. The period of emitting the pulse is a pulse repetition interval and the noise gate is offset from other gates in the altimeter. If the noise level detected during a noise-level-detection period is greater than the noise threshold, a counter value is incremented by a selected incremental value for that noise-level-detection period and it is determined if the counter value is greater than a count threshold. | 01-22-2009 |
20090058713 | Radar device - A radar device is provided in this disclosure. The radar device includes an area determination module for performing a determination of a noise superior area or a target-echo superior area for each divided area of a radar-search area defined in advance, a noise-level calculation module for calculating a noise level for a divided area based on received signals from the divided area that is determined as the noise superior area, and an interpolation module for interpolating or extrapolating the calculated noise level for the divided area that is determined as the noise superior area, to obtain a noise level for a divided area that is determined as the target-echo superior area. | 03-05-2009 |
20090109083 | Adaptive moving target indicator (MTI) clutter rejection filter for radar systems - Apparatus for providing moving target indicator (MTI) filtering in the presence of clutter for a radar receiver employing digital pulse compression to provide at an output a compressed digital pulse for application to the input of a MTI digital filter, including a digital adaptive filter of the same weight as the MTI filter and operative to receive the compressed pulse to provide at outputs of the filter a set of weighted filter coefficients, wherein the weighted coefficients are applied to the MTI filter during a predetermined clutter mode. | 04-30-2009 |
20110109493 | CONTROL DEVICE AND METHOD UTILIZING THE SAME - A control device including a signal emitter, a signal receiver, and a processing unit is disclosed. The signal emitter emits an output signal including a first output component and a second output component. The signal receiver receives an input signal. The input signal includes a reflected component when the first output component is reflected by an object. The input signal includes an emitted component when the second output component is received by the signal receiver. The processing unit compares a first threshold value with the amplitude of the input signal and compares a second threshold value with the amplitude of the input signal when the input signal simultaneously includes the reflected component and the emitted component. The processing unit differentiates the reflected component and the emitted component and invalidates the emitted component according to the compared results. | 05-12-2011 |
20110109494 | RADAR APPARATUS - According to one embodiment, an radar apparatus includes a signal processor, a transmitting unit, an antenna, a first receiving unit, and a second receiving unit. The signal processor generates first or second pulses, and generates a control signal having first or second states. The transmitting unit converts the first and second pulses into first and second transmission pulses. The antenna radiates the first and second transmission pulses and receives reflection pulses to generate a reception signal. The first receiving unit includes first and second receiving circuits which processes the reception signal to generate first and second processed signals, respectively, and outputs one of the first and second processed signals depending on the state of the control signal. The second receiving unit processes the one of the first and second processed signals. | 05-12-2011 |
20120007766 | METHOD AND PROGRAM FOR SETTING THRESHOLD, AND METHOD, PROGRAM AND DEVICE FOR DETECTING TARGET OBJECT - This disclosure provides a method of setting a threshold according to a level of an echo signal of an unused component. The echo signals are generated by transmitting and receiving a radio wave with an antenna while the antenna revolves. The method of setting the threshold includes calculating a difference value between a level of the echo signal at an observing position and a level of the echo signal at a position comparatively on the antenna side and close to the observing position, selecting a process for setting a threshold from either one of a first threshold setting process and a second threshold setting process according to the difference value, and updating the threshold for the observing position by using the selected threshold setting processing. | 01-12-2012 |
20120218138 | FULL FIDELITY RADAR RECEIVER DIGITAL VIDEO DISTRIBUTION AND PROCESSING - A processing device for providing radar data onto a local area network includes an analog-to-digital converter operable to receive analog radar data from an antenna and converter operable to convert the analog radar data into digital radar data. An interference rejector removes radar signals of other antennas from the digital radar data. A range bin decimator limits the digital radar data to a threshold number of range bins. A trigger-to-azimuth converter associates the digital radar data to particular azimuths of rotation of the antenna. A local area network manager places the digital radar data onto a local area network. The processing device may be located in the pedestal with the antenna. A plurality of processing devices associated with a plurality of antennas may provide digital radar data onto the local area network. A plurality of computers may be connected to the local area network and each computer can process the digital radar data from one or more processing devices to present a radar image on a display. | 08-30-2012 |
20120268312 | METHOD FOR MONITORING THE LAW OF ILLUMINATION OF A RADAR ANTENNA AND CORRESPONDING DEVICE - A method for controlling laws of illumination of a radar antenna with adjustable gain and/or phase, suitable for sending and for receiving a radar signal, the method including obtaining a position of an obstacle located in a near field of a beam of the radar antenna according to a direction of aim of said beam, calculating the laws of illumination on sending and on receiving of said radar antenna so as to adjust the direction of the aim of the radar beam while minimizing interaction and/or effects between the beam of the radar antenna and the obstacle, and implementing the calculated laws of illumination on sending and on receiving of the radar antenna. | 10-25-2012 |
20130169470 | RADAR SYSTEM AND METHODS OF CONTROLLING A RADAR SYSTEM AND THE PROVISION OF A RANGE-DOPPLER TARGET IMAGE SIGNATURE - A method of controlling a radar system by receiving a radar return signal from a target and generating a range-Doppler target image signature of the target; selecting a spectral line within the range-Doppler target image signature from a modulation feature on the target which includes an effective point scatterer; providing a range profile for the spectral line; obtaining a reference range profile of a reference point scatterer; determining a difference between a power at a range shorter than a peak corresponding to the modulation feature in the range profile and a power at a corresponding range of the reference range profile; and generating a first control signal or a second control signal arranged to provide or prevent provision of the range-Doppler target image signature based on the difference. | 07-04-2013 |
20150331098 | METHOD FOR SETTING A DETECTION THRESHOLD FOR A RECEIVED SIGNAL OF A FREQUENCY-MODULATED CONTINUOUS WAVE RADAR SENSOR OF A MOTOR VEHICLE ON THE BASIS OF THE NOISE LEVEL, RADAR SENSOR AND MOTOR VEHICLE - A method for setting a detection threshold for a received signal of a frequency-modulated continuous-wave radar sensor of a motor vehicle is disclosed. In successive measuring cycles of the radar sensor in each case a radar signal is emitted into a capture zone of the radar sensor and a received signal is received, in each measuring cycle a frequency spectrum relating to the respective received signal is determined, wherein individual frequency bins of the frequency spectrum each correspond to a signal level in a range-resolution cell, and the detection threshold is set individually in each case for a subset consisting of at least one frequency bin, and in order to set the detection threshold, a noise level is determined from frequency bins of temporally preceding measuring cycles and/or from frequency bins of adjacent Doppler-resolution cells of the frequency spectrum. | 11-19-2015 |
20160084941 | RADAR SYSTEM WITH PHASE BASED MULTI-TARGET DETECTION - A radar system includes a plurality of antennas and a controller. The plurality of antennas is configured to detect a reflected radar signal reflected by an object in a field-of-view of the system. Each antenna of the plurality of antennas is configured to output a detected signal indicative of the reflected radar signal detected by the antenna. The controller is configured to receive detected signals from the plurality of antennas, and determine if a target is present in the field-of-view based on the detected signals. The controller is also configured to determine if the target includes more than one object based on an analysis of phases of the detected signals. | 03-24-2016 |
342092000 | Automatic gain control (AGC) | 7 |
20090021419 | FILTERING NAGC RESPONSE TO NOISE SPIKES - A method and apparatus for dealing with noise spikes in a radar system is provided. The method includes monitoring a noise channel in the radar system. Controlling gain with a control loop based at least in part on the monitored noise channel and ignoring noise spikes detected in the noise channel when controlling gain with the control loop. | 01-22-2009 |
20090096661 | Method for detecting interference in radar system and radar using the same - A method for a radar for determining a level of interference of return of a radar wave transmitted by the radar from a target object and radio wave transmitted by some other radar, and a radar, in particular a frequency modulated continuous wave (FMCW) radar, that performs the method for determining the level of interference between the radar and some other radar is provided. In the method according to the present invention, after incident radio wave received by the radar is subjected by a frequency analysis to obtain frequency spectrum characteristic of the incident radio wave, one of frequency components of incident radio wave, the one of the frequency components having larger intensity than a predetermined intensity threshold value is not used to calculate a reference value that indicates the level of interference. | 04-16-2009 |
20110102240 | Method of down converting high-frequency signals - A method of down-converting couples a first high-frequency signal to a first detector and to a second detector. An antenna receives a signal and the received signal is provided to at least the first detector. The high-frequency signal is detected to produce a first detected signal including a first detected high-frequency signal and a demodulated signal. The high-frequency signal is concurrently detected to produce a second detected high-frequency signal. The second detected signal is subtracted from the first detected signal so as to cancel amplitude-modulated noise on a detected signal output. | 05-05-2011 |
20120007767 | METHOD, DEVICE AND PROGRAM FOR SETTING THRESHOLD, AND METHOD, DEVICE AND PROGRAM FOR DETECTING TARGET OBJECT - This disclosure provides a method of setting a threshold according to a level of an echo signal containing an unused component. The echo signal is generated by transmitting and receiving a radio wave with an antenna while the antenna revolves. The method includes acquiring levels of the echo signals at every predetermined distance interval and updating a threshold set for an observing position based on the level of the echo signal at the observing position, the threshold set for the observing position, and a threshold set for a position closer to the antenna than the observing position by the predetermined distance on the same sweep. | 01-12-2012 |
20130229297 | RADAR APPARATUS - A pulse signal is produced in a pulse generating section, and repetitively transmitted from an antenna at constant time intervals. A reception signal, received through an antenna and including a reflective wave from an object, is amplified and gain-adjusted. Thereafter, a distance detecting section detects a reception pulse of the reflected wave, and calculates the distance to the object. The variable attenuator attenuates the reception signal by a gain adjusted in accordance with a gain control signal. The gain of the variable attenuator is controlled so as to be maximum immediately after the pulse signal is transmitted, and to be reduced with elapse of time. Based on a gain adjustment timing signal, a gain adjustment timing when the attenuation amount is changed is made different for each transmission of the pulse signal. | 09-05-2013 |
20140168002 | RADAR RECEIVER - The object of the present invention is to provide a radar receiver that can steadily and reliably detect the target in the close zone without largely complicating the construction compared to the conventional radar apparatuses. The radar receiver according to the present invention comprises a receiving unit | 06-19-2014 |
20160054433 | IMPROVEMENTS IN AND RELATING TO SENSITIVITY TIME CONTROL FOR RADARS - Disclosed is a method of providing selective attenuation in a Radar receiver, comprising the steps of: receiving a plurality of returns; identifying in a first scan, a return of a magnitude exceeding a predetermined threshold; applying in a subsequent scan, a predetermined desensitisation profile to said return. Also disclosed is a Radar receiver arranged to perform the method. | 02-25-2016 |
342093000 | Constant false alarm rate (CFAR) | 19 |
20090027255 | SIGNAL PROCESSING SYSTEM FOR PULSE-DOPPLER RADAR - A signal processing system for use in pulse-Doppler radar, arranged to receive frequency domain signals for each of a plurality of Doppler bins for each range cell, comprising a data processor arranged successively to threshold each Doppler bin signal under test relative to a local average of signals formed over plural Doppler bins and/or plural ranges adjacent to the Doppler bin under test, using a variable thresholding factor, and using the thresholding result as an indication of the presence of an object of interest; the data processor using a pulse-Doppler constant false alarm rate control process to set and reset the variable thresholding factor using closed loop feedback by counting the indications of presence and incrementing or decrementing the variable thresholding factor for each thresholding result by comparing the frequency of these counts with a predetermined probability of false alarms; whereby the constant false alarm rate thresholding is a function of the range and the Doppler frequency of the range-Doppler bin signal under test. | 01-29-2009 |
20090096662 | Moving Target Detector for Radar Systems - Various embodiments are described herein for a moving target detector that processes input data to perform detection for a current range cell. The moving target detector includes a Doppler filter bank module for processing the input data to provide several Doppler outputs for the current range cell, a no-land-clutter path for processing several input data sets related to the several Doppler outputs to provide detection data by performing peak selection on each of the several input data sets and performing detection on the results of the peak selection, a land-clutter path for processing the several input data sets to provide detection data by performing Constant False Alaπn Rate (CFAR) detection on each of the several input data sets and merging the detection results; and a switching logic module for selecting one of the land-clutter path and the no-land-clutter path based on clutter information. | 04-16-2009 |
20090315757 | CONSTANT FALSE ALARM RATE ADAPTIVE RADAR CONTROL - A method of analysing return signals of successive range cells in a scene using constant false alarm rate adaptive control comprising, for each successive range cell in turn is disclosed mathematically. The return signal is processed mathematically and averaged over a predetermined number of cells near that cell. A first variable factor and the return signal for that cell, to derive a first result. The first variable is adapted depending upon that first result. A second variable factor is derived in accordance with a predetermined relationship between the first and second factors are mathematically processed. The second factor is mathematically processed. The second averaged return signal and the return signal for the cell, to derive a second result. The second result is used as an indication of the presence of an object of interest in the scene. | 12-24-2009 |
20110128180 | REPLY DETECTION IN A SECONDARY SURVEILLANCE RADAR - The present invention relates to a detecting device for detecting an SSR signal having a characteristic structure. The detecting device comprises filtering means matched to the characteristic structure of the SSR signal, and means for maintaining a false-alarm rate at a substantially constant value. The characteristic structure of the SSR signal comprises either a preamble or an initial pulse and a final pulse separated by a fixed dwell time. The means for maintaining a false-alarm rate at a substantially constant value comprise computing means configured to compute a detection threshold on the basis of a signal supplied by the filtering means, and decision means configured to detect the SSR signal on the basis of the detection threshold and of the signal supplied by the filtering means. | 06-02-2011 |
20110241930 | System and Method of Using Image Grids in Detection of Discrete Objects - A sensor is used to identify detections of discrete objects in a search grid. An image grid of the detections is created. The image grid is analyzed to identify a pattern of detections. The pattern of detections is used to identify objects of interest. | 10-06-2011 |
20120001790 | SENSOR FOR DETERMINING VELOCITY - There is provided a sensor for use generally within the signal processing unit of a radar system. The sensor enables entity returns to be classified according to the velocity of the entity and thus allows returns to be processed according to classification. In particular the sensor comprises a first processing means that filters an input signal using a narrow-band notch filter to output a wideband output. In particular the sensor comprises a second processing means that filters an input signal using a wide-band notch filter to output a narrowband output. The invention provides for the comparison of the outputs to determine how the entity return is to be classified. | 01-05-2012 |
20120127019 | METHOD AND DEVICE FOR DETECTING TARGET OBJECT, AND RADAR APPARATUS - This disclosure provides a method of detecting a target object by receiving reflection echoes of detection signals transmitted sequentially from a revolving antenna, and by detecting a target object based on detection data resulted from sampling reception signals at a predetermined time interval. The method comprises temporarily storing the detection data within a predetermined geographical range, and identifying the type of the reflection echo based on a change between values of the detection data at physically-close locations within the predetermined geographical range. | 05-24-2012 |
20120182173 | SYSTEM AND METHOD FOR MOVING TARGET DETECTION - A system and method of detecting moving targets comprises transmitting electromagnetic waves rays from a plurality of transmitters at sequential; receiving reflected waves into a plurality of receivers after each transmission; the compilation of the reflected waves from the plurality of receivers for each transmission representing a data frame; forming a signal that monitors changes between the two sets of frames; at least one processor operating to process and compare frames; forming a difference image using a back-projection algorithm; scanning the difference image using a constant false alarm rate (CFAR) window; the CFAR window scanning the entire difference image and identifying a list of points of interest and eliminating the sidelobe artifacts present in the difference image thereby creating CFAR images; processing the CFAR images using morphological processing to create a morphological image; determining the number of clusters present in the morphological image; using K-means clustering to indicate the centroid of each cluster; and tracking using a Kalman filter. The system comprises a plurality of M transmitters, a plurality of receivers, and at least one memory, the transmitters operating in sequence to transmit electromagnetic waves rays sequentially; the receivers receiving reflected waves after each transmission; the compilation of the reflected waves from the plurality of receivers for each transmission representing a data frame; at least one processor operating to perform the method. | 07-19-2012 |
20130201054 | Knowledge Aided Detector - Various embodiments are described herein for a detector and method that perform various types of CFAR detection on radar data including knowledge-aided CFAR detection, hybrid-CFAR detection and simplified censored CFAR detection. Knowledge about the type of local environment of a Cell Under Test and the proximity of the Cell Under Test to various types of noise can be used to select particular types of CFAR detection methods or combinations thereof. In other instances, certain parameters of a CFAR detection method can be adapted based on this knowledge. | 08-08-2013 |
20130342382 | TARGET OBJECT DETECTING DEVICE AND ECHO SIGNAL PROCESSING METHOD - A target object detection device is provided. The device includes a transmitter for transmitting at least one transmission wave in a predetermined azimuth, an echo signal receiver for receiving echo signals of the transmission waves, an echo signal suppressor for suppressing levels of the echo signals corresponding to sampling positions, a target object detector for detecting the target object(s) based on the level-suppressed echo signals, a first updater for comparing amplitude level(s) of echo signals of sampling positions, with the threshold that is set in association with the first distance, and determining to update the values with a new threshold and a new suppression value, and a second updater for comparing amplitude level(s) of echo signals of sampling positions, with the threshold that is set in association with the second distance, and determining to update the values with a new threshold and a new suppression value. | 12-26-2013 |
20140028488 | OPEN LOOP POWER OSCILLATOR DOPPLER RADAR - Described are radar systems and methods. A transmit pulse is generated by the radar system. A first portion of the transmit pulse is processed by the radar system to form transmit pulse data. A second portion of the transmit pulse is directed by the radar system into a monitored volume. A return signal is received by the radar system, the return signal at least partially comprising a portion of the second portion of the transmit pulse reflected by one or more objects in the monitored volume. The return signal is processed, by the radar system, to form return signal data. | 01-30-2014 |
20140176361 | IDENTIFICATION AND REMOVAL OF A FALSE DETECTION IN A RADAR SYSTEM - In one aspect, a method to identify and remove a false detection includes receiving a detection from a constant false alarm rate (CFAR) processor, performing a first similarity measure on adjacent coherent integration time values (CITs) corresponding to the detection, performing a second similarity measure on neighbor CITs corresponding to the detection, determining if at least one of the first or second similarity measure is below a threshold and discarding the detection if at least one of the first or second similarity measures is below the threshold. | 06-26-2014 |
20140375491 | METHOD, DEVICE AND SYSTEM FOR PROCESSING RADAR SIGNALS - An embodiment relates to a method for processing radar signals. The radar signals may include digitized data received by at least two radar antennas. The method may include determining CFAR results on FFT results based on data received by a first antenna, and applying the CFAR results to FFT results based on data received by a second antenna. | 12-25-2014 |
20160025840 | OPEN LOOP POWER OSCILLATOR DOPPLER RADAR - Described are radar systems and methods. A transmit pulse is generated by the radar system. A first portion of the transmit pulse is processed by the radar system to form transmit pulse data. A second portion of the transmit pulse is directed by the radar system into a monitored volume. A return signal is received by the radar system, the return signal at least partially comprising a portion of the second portion of the transmit pulse reflected by one or more objects in the monitored volume. The return signal is processed, by the radar system, to form return signal data. | 01-28-2016 |
20160033623 | USING ORTHOGONAL SPACE PROJECTIONS TO GENERATE A CONSTANT FALSE ALARM RATE CONTROL PARAMETER - An adaptive parameter for adjusting a threshold in a sensor system that provides a constant false alarm rate is disclosed. A projection space generator performs projection operations to create a matched projection space and first and second mismatched projection spaces such that each mismatched projection space is orthogonal or nearly orthogonal to the matched projection space. A mitigation engine receives the matched and first mismatched projection spaces and generates a set of weights from one of the first mismatched projection space or both of the matched and first mismatched projection spaces. A second mismatched projection space that is mismatched to both the matched and first mismatched projection spaces is provided to a clutter characterization engine that generates samples from the second mismatched projection space and the set of weights. The adaptive parameter is generated from the samples and is used as an input to a threshold adjuster in a target detector. | 02-04-2016 |
20160124086 | RADAR AMBIGUITY RESOLVING DETECTOR - Various exemplary embodiments relate to a method for determining the velocity of an object using radar system having a processor, including: receiving, by a processor, a first digital signal corresponding to a first transmit signal; receiving, by the processor, a second digital signal corresponding to a second transmit signal; processing the first digital signal to produce a first range/relative velocity matrix; detecting objects in the first range/relative velocity matrix to produce a first detection vector; unfolding the first detection vector; processing the second digital signal to produce a second range/relative velocity matrix; interpolating the second range/relative velocity matrix in the relative velocity direction wherein the interpolated second range/relative velocity matrix has a frequency spacing corresponding to the frequency spacing of the first range/relative range velocity matrix in the relative velocity direction; detecting objects in the second range/relative velocity matrix to produce a second detection vector; unfolding the second detection vector; and determining a true velocity of the detected objects based upon the unfolded first and second detection vectors. | 05-05-2016 |
20160161596 | Stationary doppler target suppressor - A device and method to suppress clutter generated by stationary targets that also have moving components that give significant Doppler returns when scanned by radar, such as wind turbines. | 06-09-2016 |
20160178731 | Wind turbine rejection in non-scanning radar | 06-23-2016 |
20170234968 | Radar Employing Preacquisition Ramps | 08-17-2017 |