Quellan, Inc. Patent applications |
Patent application number | Title | Published |
20130099855 | Filter Shaping Using a Signal Cancellation Function - A signal filter and accompanying methods. In one embodiment, the filter includes a first mechanism for receiving a first signal. A second mechanism employs one or more modified representations of the first signal to cancel one or more frequency components of the first signal, yielding an output signal in response thereto. In a more specific embodiment, the first mechanism includes a splitter for receiving the first signal and splitting the first signal onto a first path and a second path. The second mechanism further includes one or more delay modules and one or more phase shifters in the first path and/or the second path. One or more controllable amplifiers are optionally included in the first path and/or the second path. The one or more delay modules, phase shifters, or amplifiers are responsive to one or more control signals from a controller. The controller is adapted to modify behavior of the second mechanism so that the filter is characterized by a desired frequency response. | 04-25-2013 |
20130064382 | Pre-Configuration and Control of Radio Frequency Noise Cancellation - A noise-reduction system includes a noise-pattern predictor in communication with a noise-canceling module. In a more specific embodiment, the noise-reduction apparatus further includes an input collector in communication with the noise-pattern predictor. The input collector is coupled to a first module, such as a sensor, that provides information to the noise-pattern predictor to facilitate predicting noise in an accompanying signal environment and to provide a first signal in response thereto. In an illustrative embodiment, the first signal includes information indicating when an ignition system of a vehicle will turn on. The first signal further includes information indicating when a second signal transmitted from a cellular base station will affect noise in the signal environment. The second signal may include a burst in a cellular signal. | 03-14-2013 |
20130064335 | ADAPTIVE NOISE FILTERING AND EQUALIZATION - Processing a signal comprising signal distortions with filters. The filters comprise a first filter configured to a first time scale to compensate for signal distortions within respective symbols of the signal and a second filter configured to a second time scale to compensate for signal distortions among symbols of the signal. A probability estimate is produced based on an output of at least one of the first and second filters. At least one of the first and second time scales is adjusted according to the probability estimate. | 03-14-2013 |
20110069604 | Method and System for Signal Emulation - A circuit can process a sample of a signal to emulate, simulate, or model an effect on the signal. Thus, an emulation circuit can produce a representation of a real-world signal transformation by processing the signal according to one or more signal processing parameters that are characteristic of the real-world signal transformation. The emulation circuit can apply analog signal processing and/or mixed signal processing to the signal. The signal processing can comprise feeding the signal through two signal paths, each having a different delay, and creating a weighted sum of the outputs of the two signal paths. The signal processing can also (or alternatively) comprise routing the signal through a network of delay elements, wherein a bank of switching or routing elements determines the route and thus the resulting delay. | 03-24-2011 |
20100301671 | POWER EXTRACTION FROM SIGNAL SINKS - A power extractor suitable for locations proximate to the sink of a signal channel is disclosed. The power extractor can generate power from the signal channel without substantially disturbing a quality of signals within the channel. In one embodiment, the power extraction circuit can include: a current source coupled to a sink side of a signal channel, where the signal channel is independent of any power supply signal, the current source being high impedance to maintain signal quality within the signal channel; a first regulator configured to generate a first regulated supply from a current derived from the signal channel using the current source; and a second regulator coupled to the first regulator, where the second regulator is configured to generate a second regulated supply from the first regulated supply. | 12-02-2010 |
20100295591 | INTER-PAIR SKEW ADJUSTMENT - A skew adjustor that can reduce inter-pair skew between differential signals received via a cable is disclosed. In one embodiment, a skew adjustor includes: a skew detector that receives signals from a cable, and provides a detected skew amount when skew is detected between two of the signals; an offset controller for receiving the detected skew amount, and for providing a delay control signal in response thereto; and a skew delay circuit that receives the signals and the delay control signal, and enables one or more delay stages in a path of a first arriving of the two skewed signals based on the delay control signal, such that an adjusted skew between the two skewed signals at an output of the skew delay circuit is less than the detected skew amount by an amount corresponding to the enabled one or more delay stages. | 11-25-2010 |
20100278085 | DUPLEXER AND SWITCH ENHANCEMENT - A signal selector enhancer suitable for portable electronic devices and base stations is disclosed. In one embodiment, the enhancer can include: a filter for receiving a signal from a first node, and for providing a filtered signal output therefrom, where the first node is coupled to a signal selector; and a noise canceller for receiving the filtered signal output, and for providing an adjusted filtered signal at a second node, where the second node is coupled to the signal selector, and where an operation of the signal selector is enhanced by the filter and the noise canceller arrangement. | 11-04-2010 |
20100244943 | FILTER SHAPING USING A SIGNAL CANCELLATION FUNCTION - A signal filter and accompanying methods. In one embodiment, the filter includes a first mechanism for receiving a first signal. A second mechanism employs one or more modified representations of the first signal to cancel one or more frequency components of the first signal, yielding an output signal in response thereto. In a more specific embodiment, the first mechanism includes a splitter for receiving the first signal and splitting the first signal onto a first path and a second path. The second mechanism further includes one or more delay modules and one or more phase shifters in the first path and/or the second path. One or more controllable amplifiers are optionally included in the first path and/or the second path. The one or more delay modules, phase shifters, or amplifiers are responsive to one or more control signals from a controller. The controller is adapted to modify behavior of the second mechanism so that the filter is characterized by a desired frequency response. | 09-30-2010 |
20100074315 | NOISE SAMPLING DETECTORS - A noise sampling detector suitable for portable electronic devices is disclosed. The detector may detect noise, transmitter signals, spurs, and/or interference. In one embodiment, a detector can include: a load portion; an antenna pattern shaping portion coupled to the load portion, where the antenna pattern shaping portion includes meandering segments of variable lengths and/or widths; and an impedance matching circuit coupled to the antenna pattern shaping portion. | 03-25-2010 |
20100039923 | Method and System for Crosstalk Cancellation - Signals propagating in one communication channel can generate crosstalk interference in another communication channel. A crosstalk cancellation device can process the signals causing the crosstalk interference and generate a crosstalk cancellation signal that can compensate for the crosstalk when applied to the channel receiving crosstalk interference. The crosstalk cancellation device can include a model of the crosstalk effect that generates a signal emulating the actual crosstalk both in form an in timing. The crosstalk cancellation device can include a controller that monitors crosstalk-compensated communication signals and adjusts the model to enhance crosstalk cancellation performance. The crosstalk cancellation device can have a mode of self configuration or calibration in which defined test signals can be transmitted on the crosstalk-generating channel and the crosstalk-receiving channel. | 02-18-2010 |
20100027709 | Method And System For Slicing A Communication Signal - A slicer can receive a communication signal having a level or amplitude that is between two discrete levels of a multilevel digital communication scheme. The slicer can compare the communication signal to a plurality of references such that multiple comparisons proceed essentially in parallel. A summation node can add the results of the comparisons to provide an output signal set to one of the discrete levels. The slicer can process the communication signal and provide the output signal on a symbol-by-symbol basis. A decision feedback equalizer (“DFE”) can comprise the slicer. A feedback circuit of the DFE can delay and scale the output signal and apply the delayed and scaled signal to the communication signal to reduce intersymbol interference (“ISI”). | 02-04-2010 |
20090016545 | PRE-CONFIGURATION AND CONTROL OF RADIO FREQUENCY NOISE CANCELLATION - A noise-reduction system includes a noise-pattern predictor in communication with a noise-canceling module. In a more specific embodiment, the noise-reduction apparatus further includes an input collector in communication with the noise-pattern predictor. The input collector is coupled to a first module, such as a sensor, that provides information to the noise-pattern predictor to facilitate predicting noise in an accompanying signal environment and to provide a first signal in response thereto. In an illustrative embodiment, the first signal includes information indicating when an ignition system of a vehicle will turn on. The first signal further includes information indicating when a second signal transmitted from a cellular base station will affect noise in the signal environment. The second signal may include a burst in a cellular signal. | 01-15-2009 |