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US20140010325 METHOD TO MINIMIZE INTERFERENCE INTO LEGACY SDARS RECEPTION BY VARYING OVERLAY MODULATION AS A FUNCTION OF SATELLITE POSITION  
Degree of hierarchical modulation can be varied as a function of satellite position, where such hierarchical modulation can be a combination of phase and amplitude shifts. As each satellite in a...
US20090207942 Embedded Multimedia System and Related Digital Audio Broadcasting Demodulator  
An embedded multimedia system for playing analog and digital audio broadcasting signals includes an antenna for receiving analog and digital audio broadcasting signals, an audio output device for...
US20070189419 Conversion of multiple analog signals in an analog to digital converter  
A multiple analog signal converter (100) simultaneously converts multiple analog signals (104,106) to digital signals (112, 114) using a single analog to digital converter (ADC) 102. A first...
US20120275546 MULTIPLE SYMBOL NONCOHERENT SOFT OUTPUT DETECTOR  
Multiple symbol noncoherent soft output detectors in accordance with embodiments of the invention are disclosed. In a number of embodiments, the multiple symbol noncoherent soft output detector...
US20110182329 DEVICE AND METHOD FOR DISTORTION-ROBUST DECODING  
A device for decoding code symbols which are interfered with a distortion during a predetermined distortion time interval includes a reliability information generator to provide reliability...
US20070110188 Signal decoding method and device, and signal storage system  
An LDPC unit decoder included in a signal decoding device is provided with a parity checking unit that is a multiplier for performing multiplication of a check matrix (parity check matrix) and...
US20060039506 Phase/gain imbalance estimation or compensation  
The present invention relates to a receiver for estimation or compensation of phase imbalance or gain imbalance utilizing a QPSK modulation and a modulation scheme based on a complex scrambling...
US20090161797 SATELLITE DETECTION OF AUTOMATIC IDENTIFICATION SYSTEM SIGNALS  
A system and method of detecting Automatic Identification System (AIS) signals in space and decoding these signals. In one aspect, a system for performing this function is described which includes...
US20120219093 METHOD AND APPARATUS FOR CHANNEL QUALITY MEASUREMENTS  
A method and apparatus for measuring channel quality over which has been transmitted a sequence of symbols produced by encoding and constellation mapping a source data element sequence. A sequence...
US20090175384 MULTI-SYMBOL NONCOHERENT CPM DETECTOR HAVING A TRELLIS STRUCTURE AND A LOCK DETECTOR THEREFOR  
Multi-symbol non-coherent continuous phase modulation (CPM) detectors having a trellis structure, methods of continuous phase detection using a trellis structure, and trellis-based lock detectors...
US20130148967 DISTORTION COMPENSATOR, OPTICAL RECEIVER, DISTORTION COMPENSATOR AND OPTICAL RECEIVER CONTROLLING METHODS, AND OPTICAL TRANSMISSION SYSTEM  
A distortion compensator, an optical receiver and a transmission system including an operation selectively compensating for linear waveform distortion exerted on an optical signal via a plurality...
US20130202062 COLLISION DETECTION USING A MULTIPLE SYMBOL NONCOHERENT SOFT OUTPUT DETECTOR  
Systems and methods for detecting collisions in radio frequency tags in accordance with embodiments of the invention are disclosed. In one embodiment, a receiver system includes a receiver...
US20080159441 Method and apparatus for carry estimation of reduced-width multipliers  
A low-error reduced-width multiplier is provided by the present invention. The multiplier can dynamically compensate the truncation error. The compensation value is derived by the dependencies...
US20130044655 WIRELESS COMMUNICATIONS DEVICE WITH MULTIPLE TRELLIS DECODERS AND RELATED METHODS  
A wireless communications device includes a receiver, and a decoder coupled downstream from the receiver. The decoder is configured to alternatively decode a first signal using a first trellis...
US20140355720 WIDEBAND FM DEMODULATION BY INJECTION-LOCKED DIVISION OF FREQUENCY DEVIATION  
A novel and useful wideband FM demodulator operating across an 8 GHz IF bandwidth for application in low-power, wideband heterodyne receivers. The demodulator includes an n-stage ring oscillator...
US20060029159 Method of selecting demodulation scheme and digital broadcast receiver using the same  
A method and apparatus for efficiently selecting a demodulation scheme for a particular channel in a digital broadcast receiver supporting a plurality of demodulation schemes are provided. The...
US20120076196 DECISION DIRECTED TIMING RECOVERY USING MULTI-PHASE DETECTION  
A set of one or more samples is received. Using a first signal processor associated with a first phase offset, a first decision and a first error value are generated using the set of samples....
US20060222108 Determining modulo count in sleep capable system  
Apparatus and methods of determining a modulo count of a synchronization number in a sleep capable system. The synchronization number is stored in a comparison register, and a comparison number...
US20130142286 WIRELESS COMMUNICATIONS DEVICE HAVING WAVEFORM BANKS WITH FREQUENCY OFFSET AND RELATED METHODS  
A wireless communications device includes a receiver, and a demodulator coupled downstream from the receiver and configured to use a continuous phase modulation (CPM) waveform to non-coherently...
US20110064165 DEMODULATION APPARATUS AND METHOD FOR RFID READER IN PASSIVE RFID ENVIRONMENT  
A demodulation apparatus for a Radio Frequency Identification (RFID) reader includes: a direct current (DC) offset cancellation unit for cancelling DC-offset noise contained in a PSK-modulated or...
US20050084040 Method for modulation detection  
A method of modulation detection. A signal is received. A first decision statistic can be generated based on the received signal. The received signal can be transformed. A second decision...
US20110188613 Compact pulse shaping for QM-MSK and PAM/QAM reception  
Compact pulse shape partial response (CPS PR) signaling is developed for trellis based signals like QM-MSK, and for PAM/QAM type signals to improve the performance to bandwidth tradeoff. Compact...
US20110206144 RECEIVER AND TRANSMISSION/RECEPTION SYSTEM  
In a wireless receiver, a “variance” of an intermediate output signal of a demodulation section is calculated by a variance calculation section, and the calculated variance is used as a signal...
US20140003555 PHASE COMPENSATION RECEIVER  
A phase excursion compensation circuit of a phase modulation signal demodulator detects occurrence of a slip of a received signal from a change in a phase compensation amount that is formed into...
US20120128101 METHOD AND APPARATUS FOR ROBUST AND HIGH EFFICIENCY FEC FRAME HEADER RECOVERY  
Methods and apparatus for FEC frame header detection are provided, suitable for use in a DVB-C2 receiver. A first method comprises demodulating with a quadrature phase shift keying (QPSK)...
US20090086851 Method And System For Quadrature Local Oscillator Generator Utilizing A DDFS For Extremely High Frequencies  
Methods and systems for a quadrature local oscillator generator utilizing a DDFS for extremely high frequencies. Aspects of one method may include utilizing the DDFS to generate a first signal...
US20050213689 Demodulator circuit, radio communication system and communication semiconductor integrated circuit  
A communication semiconductor integrated circuit has a demodulator circuit built in a single semiconductor chip. The demodulator circuit is constructed to demodulate a received OFDM-modulated...
US20080144743 Demodulator system and method  
A demodulator system and method is disclosed. In an embodiment, the demodulator system can include a Coordinate Rotation Digital Computer (CORDIC) mixer to mix a first signal substantially to...
US20050111587 Demodulator and receiver using same  
A high performance demodulator able to realize a further wide band property, low distortion characteristics, and low power consumption in comparison with a conventional multi-port demodulator and...
US20100034318 Binary continuous phase modulation (CPM) data demodulation receiver  
A communications receiver receives a received continuous phase modulation (CPM) signal having an original modulation index of h and includes a filter, a continuous phase reconstructor using phase...
US20080285684 Compact Dual Receiver Architecture for Point to Point Radio  
A radio frequency receiver comprising a receiver module, an intermediate frequency (“IF”) module, a synthesizer module and a controller module. The receiver module receives a radio frequency...
US20100067618 D-PSK Demodulation Based On Correlation Angle Distribution  
An apparatus and method is described that provides optimal D-PSK demodulation based on the distribution of phase differences between successive D-PSK symbols. A plurality of D-PSK data symbols are...
US20090086852 DATA RECEIVER DEVICE AND DATA TRANSMISSION/RECEPTION SYSTEM  
The data receiver device includes: a bit phase synchronizing circuit (10) for performing phase adjustment of a received data signal to set a predetermined phase relationship between the data...
US20070211830 Impulse detection and reduction in a frequency modulation radio receiver  
A radio receiver includes a processing unit that may generate a respective phase value corresponding to each of a plurality of digital samples of a received complex frequency modulation (FM)...
US20080025437 Quadrature bandpass-sampling delta-sigma communication receiver  
A quadrature bandpass-sampling analog-to-digital demodulator (QBS-ADD) is provided. A radio frequency (RF) signal is received by a junction summer, which subtracts an in-phase feedback signal and...
US20090207943 Semiconductor Circuit Device  
A semiconductor circuit device is provided which can attain more stable operations against noise in a data communication system without increasing the power consumption of an overall system,...
US20140029700 MULTI-TAP IQ IMBALANCE ESTIMATION AND CORRECTION CIRCUIT AND METHOD  
A system (55-1) for correcting gain imbalance and phase imbalance between first (IOUT) and second (QOUT) signals which are 90° out of phase, including circuitry (32) for estimating the phase...
US20110129008 Methods, Apparatuses, System and Related Computer Program Product for Cell Type Detection  
It is disclosed a method comprising including transmitting indication information indicating network cells of a first type different from network cells of a second type, the transmitting...
US20090116586 DIRECT CONVERSION RECEIVER AND METHOD FOR CORRECTING PHASE IMBALANCE THEREIN  
A direct conversion receiver and a method for correcting phase imbalance therein is disclosed. An input signal is applied to an in-phase channel and a quadrature channel of the receiver. The input...
US20130336424 Signal Transmitting Device and Phase Modulated Method for Transmitting via a Signal Transmitting Device  
A signal transmitting device and a method for transmitting via a signal transmitting device is disclosed. In one embodiment the transmitting device comprises a first resonant circuit with a...
US20100329392 Apparatus and Method for IQ Imbalance Calibration in a Receiver  
A method and apparatus is disclosed to compensate for an in-phase/quadrature phase (I/Q) imbalance in a communications receiver. The communications receiver may utilize information gained from...
US20070195911 Radio apparatus with wasteful power consumption diminished without reliance upon analysis by an RSSI and a power control method therefor  
A mobile phone terminal device checks, in a Manchester determiner, whether or not demodulated data satisfies a predetermined condition for decision exploiting a feature proper to the Manchester...
US20070071135 Method and device for increasing the capacity of non-spread transmission systems  
A method for increasing the capacity of signal transmission systems comprising NT users, a single-piece receiver receiving the mixture of signals originating from the NT users including at least...
US20100284480 METHOD AND APPARATUS FOR CHANNEL QUALITY MEASUREMENTS  
A method and apparatus are provided for measuring channel quality over which has been transmitted a sequence of symbols produced by encoding and constellation mapping a source data element...
US20060209988 Demodulation circuit for use in receiver using if directing sampling scheme  
Disclosed is a demodulation circuit for demodulating an IF signal which is input via an antennal and then over-sampled at a sampling rate four times a frequency of a baseband signal, the...
US20100150271 MODULATED CLOCK, AN IC INCLUDING THE MODULATED CLOCK AND A METHOD OF PROVIDING A MODULATED CLOCK SIGNAL FOR POWER CONTROL  
A modulated clock, a method of providing a modulated clock signal, an integrated circuit including a modulated clock and a library of cells including a modulated clock. In one embodiment, the...
US20060222109 Quadrature detection method, quadrature detection device and radio wave time piece  
A radio wave timepiece A and a quadrature detection device for executing a quadrature detecting method are disclosed including a receiving antenna 14 for receiving a carrier wave of a long wave...
US20080152041 METHOD AND DEVICE FOR DECODING A SIGNAL  
A method and a circuit for determining the frame header of a signal that can be applied to standard DVBS2.
US20080159442 WIRELESS COMMUNICATION APPARATUS AND RECEIVING METHOD  
A wireless communication apparatus receives an quadrature modulated signal, generate a local signal having a frequency different from a center frequency of the quadrature modulated signal,...
US20110158353 ORTHOGONALITY DETECTOR, AND QUADRATURE DEMODULATOR AND SAMPLING QUADRATURE DEMODULATOR USING DETECTOR THEREOF  
To detect phase mismatches between in-phase and quadrature signals of a quadrature demodulator. The phase mismatches can be detected using the signals obtained by removing high frequency...

Matches 1 - 50 out of 156 1 2 3 4 >