Patent application number | Description | Published |
20080287072 | Detecting a signal in the presence of noise - In one embodiment, the present invention includes a method for receiving an incoming radio frequency (RF) signal in a receiver, estimating a signal-to-noise ratio (SNR) of a constant modulus (CM) signal in the incoming RF signal based on a calculated magnitude of the incoming RF signal, and indicating presence of a modulated signal in the incoming RF signal if the estimated SNR is greater than a threshold. | 11-20-2008 |
20090028250 | DECODER WITH SOFT DECISION COMBINING - A receiver including first circuitry configured to combine corresponding soft decision values from at least two groups of RDS/RBDS data transmitted as part of a broadcast channel to generate a set of combined values and second circuitry configured to identify a subset of the combined values that indicate a relatively constant subset of the received values from the at least two groups of the RDS/RBDS data is provided. | 01-29-2009 |
20090124230 | SYSTEM AND METHOD FOR DECODING RDS/RBDS DATA - A method performed by a receiver is provided. The method includes generating an RDS/RBDS candidate codeword from a set of RDS/RBDS symbols where the RDS/RBDS candidate codeword has a subset of RDS/RBDS values that differs from corresponding subsets of RDS/RBDS values in all other possible RDS/RBDS codewords and determining whether the RDS/RBDS candidate codeword meets an acceptance criterion by comparing a first subset of reliability values determined from the set of RDS/RBDS symbols and having signs that differ from corresponding signs in the subset of RDS/RBDS values with a second subset of reliability values determined from the set of RDS/RBDS symbols and mutually exclusive with the first subset of the reliability values. A first number of values in the first and the second subsets of reliability values is less than a second number of values in the RDS/RBDS candidate codeword. | 05-14-2009 |
20090203344 | Methods and systems for stereo noise mitigation - Methods and systems are disclosed that mitigate stereo noise in FM broadcast receivers by assessing L−R (left-minus-right) and L+R (left-plus-right) levels within tuned FM channels. These assessments are used to facilitate control of a blend from stereo output signals to mono output signals in order to reduce and mitigate stereo noise and distortion in the audio outputs. The side effects of the disclosed systems and methods are unobtrusive as compared to prior blend-to-mono techniques. | 08-13-2009 |
20100009645 | Controlling Fine Frequency Changes In An Oscillator - In one embodiment, the present invention includes a method for determining if a frequency control instruction would cause a first capacitor bank to reach a limit and adjusting the first capacitor bank in a first direction using a calibration value and adjusting a second capacitor bank in a second direction if the first capacitor bank would reach the limit. Furthermore, the calibration value may be calculated and stored in accordance with other embodiments. In such manner, small changes in capacitance and correspondingly small changes in frequency may be effected. | 01-14-2010 |
20100080326 | RDS/RBDS DECODER WITH RELIABLE VALUES - A method is provided that contemplates including filtered decode values in an RDS/RBDS output signal. The filtered decode values are generated from reliable values. The reliable values are generated from corresponding received values from each of at least two groups of RDS/RBDS data in an RDS/RBDS input signal. The method also comprises preventing an error correction code (ECC) unit from modifying the filtered decode values in the RDS/RBDS output signal. | 04-01-2010 |
20130003637 | DYNAMIC TIME ALIGNMENT OF AUDIO SIGNALS IN SIMULCAST RADIO RECEIVERS - A method and apparatus for performing dynamic time alignment of program content extracted from analog and digital radio signals of a simulcast is disclosed. A delay estimation unit of a radio receiver is configured to dynamically determine an amount of received delay between analog-transmitted and digital portions of a radio program. An internal delay to compensate for the received delay may be applied to a data stream corresponding to the portion that is leading. The radio receiver may initially provide audio output from the analog-transmitted portion. In the case of leading analog-transmitted audio, the audio from the analog-transmitted portion may be incrementally delayed to align with the digitally transmitted audio. Once data streams corresponding to the analog-transmitted and digitally transmitted portions are sufficiently aligned in time, a blend operation may be performed. The blend operation may transition the output from being sourced by the analog-transmitted portion to the digitally-transmitted portion. | 01-03-2013 |
20130003801 | DELAYING ANALOG SOURCED AUDIO IN A RADIO SIMULCAST - A method and apparatus is disclosed in which delay is applied to analog-sourced audio in a radio simulcast when the analog signal initially leads the digital signal. A radio receiver is configured to receive a simulcast radio program broadcast with an analog signal and a digital signal. The program content can be extracted from either the analog or digital signals, with the audio source eventually being blended to the digital signal. Audio is initially provided based on the analog signal. If the analog signal is initially leading the digital signal, delay is applied a data stream corresponding to the analog signal relative to a data stream corresponding to the digital signal. Delay applied to the data stream corresponding to the analog signal is increased at a rate that avoids audio artifacts of the output audio. The blend is performed when the data streams are aligned in time. | 01-03-2013 |
20130003894 | DELAY ADJUSTMENT USING SAMPLE RATE CONVERTERS - A method and apparatus for adjusting the delay of a first data stream relative to a second data stream is disclosed. An apparatus receives first and second data streams having identical content. A timing difference between the first and second data streams is estimated. At least the leading one of the data streams is applied to a sample rate converter. The sample rate converter is configured to receive a data stream at an input sampling rate and to output the data stream at an output sampling rate. Based on the estimated timing difference, delay is applied to the leading one of the data streams by changing the sampling rate of the sampling rate converter. The output sampling rate of the sampling rate converter may be adjusted until both data streams are aligned in time. | 01-03-2013 |
20130003904 | DELAY ESTIMATION BASED ON REDUCED DATA SETS - A delay estimation unit is disclosed. The delay estimation unit may receive first and second streams of data having identical content. The amount of data in the data streams is reduced by filtering (e.g., lowpass filtering) the first and second data streams to produce first and second filtered streams, respectively. The amount of data is further reduced by decimating the first and second filtered streams, discarding all but one of every N samples to produce first and second decimated data, respectively. The first and second decimated streams are received by a correlator that performs a correlation operation. The output of the correlator is received by a peak search unit that analyzes the correlation results over time and searches for peaks that indicate alignment of the first and second data streams. | 01-03-2013 |
20140094130 | Time-Domain Diversity Combining of Signals For Broadcast Receivers - Systems and methods are disclosed for time-domain diversity combining of radio frequency (RF) broadcast signals. Two channelized quadrature (I/Q) signals are generated by different tuner circuitry coupled to two different antennas, are converted to frequency-domain signals, and are used to generate frequency-domain diversity weighting signals. The frequency-domain diversity weighting signals are then converted to time-domain weights and applied to the channelized I/Q signals. The weighted and channelized I/Q signals are then combined in the time-domain to provide a time-domain diversity combined signal. The resulting combined signal can be further processed, as desired, such as by using a demodulator to generate demodulated output signals. Disclosed methods and systems can be applied to a variety of receiver systems configured to receive RF broadcast signals. | 04-03-2014 |
20140254813 | AUDIO PROCESSOR CIRCUITS FOR ACOUSTIC ECHO CANCELLATION AND METHOD THEREFOR - In one form, an audio processor circuit includes a first digital signal processing circuit, a second digital signal processing circuit, and an interleaver. The first digital signal processing circuit has an input for receiving a far-end audio signal, and an output. The second digital signal processing circuit has an input for receiving a digital near-end audio signal, and an output. The interleaver has a first input coupled to the output of the first digital signal processing circuit, a second input coupled to the output of the second digital signal processing circuit, and an output for alternatively providing signals received from the first and second inputs to the output. | 09-11-2014 |
20140355726 | Methods And Systems For Rapid Detection Of Digital Radio Signals - Systems and methods are disclosed for rapid detection of digital content within received radio frequency (RF) signals. The disclosed embodiments digitize received RF signals and apply a sliding window average to subsampled complex magnitudes for the digital samples to generate subsampled magnitude values. The subsampled magnitude values are then collected over a small number of symbols for the digital content, and the results are analyzed to determine whether or not digital content is present with the received signals. For example, multi-symbol histograms and magnitude ratios determined over multiple symbols can then be utilized to make the determination of whether digital content is present in the received signals. The resulting detection determination can be utilized further to control operations of systems utilizing the disclosed embodiments. The disclosed embodiments can be used, for example, to detect the presence of HD (High Definition) Radio digital content within broadcast channels. | 12-04-2014 |
20150063497 | Antenna Diversity Combining For Differentially Modulated Orthogonal Frequency Division Multiplexed (OFDM) Signals - In an embodiment, an apparatus includes a first tuner to receive a radio frequency (RF) signal from a first antenna and to process the RF signal to generate a first time-domain quadrature signal, a second tuner to receive the RF signal from a second antenna and to process the RF signal to generate a second time-domain quadrature signal, and a combiner circuit to receive the first and second time-domain quadrature signals. | 03-05-2015 |
Patent application number | Description | Published |
20090273286 | MULTIPLE-INPUT ELECTRONIC BALLAST WITH PROCESSOR - A ballast having a microprocessor embedded therein is controlled via four inputs. The ballast includes a high-voltage phase-controlled signal provided by a dimmer and an infrared (IR) receiver through which the ballast can receive data signals from an IR transmitter. The ballast can also receive commands from other ballasts or a master control on the serial digital communication link, such as a DALI protocol link. The fourth input is an analog signal, which is simply a DC signal that linearly ranges in value from a predetermined lower limit to a predetermined upper limit, corresponding to the 0% to 100% dimming range of the load. The output stage of the ballast includes one or more FETs, which are used to control the current flow to the lamp. Based on these inputs, the microprocessor makes a decision on the intensity levels of the load and directly drives the FETs in the output stage. | 11-05-2009 |
20090273296 | MULTIPLE-INPUT ELECTRONIC BALLAST WITH PROCESSOR - A ballast having a microprocessor embedded therein is controlled via four inputs. The ballast includes a high-voltage phase-controlled signal provided by a dimmer and an infrared (IR) receiver through which the ballast can receive data signals from an IR transmitter. The ballast can also receive commands from other ballasts or a master control on the serial digital communication link, such as a DALI protocol link. The fourth input is an analog signal, which is simply a DC signal that linearly ranges in value from a predetermined lower limit to a predetermined upper limit, corresponding to the 0% to 100% dimming range of the load. The output stage of the ballast includes one or more FETs, which are used to control the current flow to the lamp. Based on these inputs, the microprocessor makes a decision on the intensity levels of the load and directly drives the FETs in the output stage. | 11-05-2009 |
20140265880 | DIGITAL LOAD CONTROL SYSTEM PROVIDING POWER AND COMMUNICATION VIA EXISTING POWER WIRING - A two-way load control system comprises a power device, such as a load control device for controlling an electrical load receiving power from an AC power source, and a controller adapted to be coupled in series between the source and the power device. The load control system may be installed without requiring any additional wires to be run, and is easily configured without the need for a computer or an advanced commissioning procedure. The power device receives both power and communication over two wires. The controller generates a phase-control voltage and transmits a forward digital message to the power device by encoding digital information in timing edges of the phase-control voltage. The power device transmits a reverse digital message to the controller via the power wiring. | 09-18-2014 |
20140265897 | CHARGING AN INPUT CAPACITOR OF A LOAD CONTROL DEVICE - A load control device for controlling the amount of power delivered to an electrical load may include a rectifier circuit configured to receive a phase-control voltage and produce a rectified voltage. A power converter may be configured to receive the rectified voltage at an input and generate a bus voltage. An input capacitor may be coupled across the input of the power converter. The input capacitor may be adapted to charge when the magnitude of the phase control voltage is approximately zero volts. The power converter may be configured to operate in a boost mode, such that the magnitude of the bus voltage is greater than a peak magnitude of the input voltage. The power converter may be configured to operate in a buck mode to charge the input capacitor from the bus voltage when the magnitude of the phase-control voltage is approximately zero volts. | 09-18-2014 |
Patent application number | Description | Published |
20140315214 | CHAPERONE INTERACTION ASSAYS AND USES THEREOF - In some aspects, the invention provides methods of identifying, detecting, and/or measuring protein-protein interactions. In some aspects, the invention provides methods of identifying and/or characterizing modulators of protein-protein interactions. In some aspects, the invention provides methods of identifying and/or characterizing modulators of protein activity, wherein the methods are based at least in part on measuring interaction between a chaperone and client protein. In some aspects, the invention provides methods for identifying and/or characterizing compounds and/or for assessing compound specificity, wherein the methods are based at least in part on measuring interaction between a chaperone and client protein. In some embodiments, a client protein is a kinase. In some embodiments, a compound is a kinase inhibitor. In some aspects, the invention provides methods of profiling kinase inhibitor specificity. In some aspects, the invention provides assay systems and/or reagents useful for performing one or more of the inventive methods. In some aspects, the invention provides newly identified targets of a variety of kinase inhibitors. In some aspect, the invention provides methods of inhibiting kinases identified herein as targets of certain kinase inhibitors. In some aspects, the invention provides methods of treating a disease, e.g., cancer, by inhibiting one or more kinase(s) newly identified as targets of certain kinase inhibitors. | 10-23-2014 |