Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 8116406 | Apparatus and method for generating soft bit metric and M-ary QAM receiving system using the same Provided are an apparatus and method for generating a soft bit metric and a multi-level (M-ary) Quadrature Amplitude Modulation (QAM) receiving system using the same. The apparatus includes an analog to digital converter for converting an analog symbol signal of a d... | 02/14/2012 |
| 8107560 | Method and apparatus for interference cancellation in communication signal processing A method and apparatus blindly detects a received signal's modulation type characterizing an impairment component of the received signal for each postulated modulation type by determining spatial correlations between In-phase and Quadrature components of the receive... | 01/31/2012 |
| 8094753 | Device for estimating symbol timing or frequency offset with reliability of demodulated signal determined A PHS mobile phone set is provided with an offset estimation device which estimates an offset of a signal received through digital communication and makes use of the estimated offset as correction information for offset correction. The received signal is corrected i... | 01/10/2012 |
| 8090055 | 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 unwrapping, and a modulation index scaler for generating a reconstruct... | 01/03/2012 |
| 8090056 | System and method for anticipatory receiver switching based on signal quality estimation In various embodiments, a first and second complex multiplier may be configured to receive an input signal and provide a baseband I component signal and a baseband Q component signal, respectively. A first and second filter may be configured to filter the baseband I... | 01/03/2012 |
| 8085875 | Incremental pilot insertion for channnel and interference estimation Dynamic resource allocation systems, apparatus, and methods are disclosed for selectively improving the ability of a receiver to determine a channel estimate in an Orthogonal Frequency Division Multiple Access (OFDMA) system. A wireless communication system can use ... | 12/27/2011 |
| 8085877 | 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 that may comprise an in-phase (I) component and a quadrature phase (Q) co... | 12/27/2011 |
| 8085876 | Apparatus and method for sampling frequency offset and carrier frequency offset estimation and correction in a communication system A communication system, including a receiver, is described having a common clock source that drives both carrier frequency (fc) and sampling frequency (fs). The receiver comprises a first signal processing stage for down converting a received d... | 12/27/2011 |
| 8081714 | Method and system for reuse of CORDIC in an RF transceiver by reconfiguration in real time Methods and systems for processing an RF signal are disclosed herein. Aspects of the method may comprise utilizing a single input CORDIC and a single output CORDIC for synchronizing and demodulating a received signal, wherein the received signal may comprise one or ... | 12/20/2011 |
| 8073079 | Angle-modulated signal threshold extension device and method A threshold noise-canceling method comprising the steps of: receiving an angle-modulated signal; identifying in the angle-modulated signal potential threshold noise events that exceed a first threshold value; calculating average values of the phase of the angle-modu... | 12/06/2011 |
| 8068562 | Signal processing for multiple chains including barker code correlation and auto-correlation A method of processing a signal in a wireless network including multiple chains is provided. This method can include receiving the signal in a receiver and, for each chain, performing a Barker correlation on the signal to generate a Barker correlated signal. At this... | 11/29/2011 |
| 8064542 | Systems and methods for I/Q imbalance correction and calibration of variable modulus signals Disclosed herein are systems and methods for accurate removal of I/Q mismatch in received signals of an analog FM receiver. The analog FM receiver includes a down-converter, a calibration circuit that estimates I/Q mismatch values, and a compensation circuit that us... | 11/22/2011 |
| 8059758 | 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 analog signal (104) at a first center fr... | 11/15/2011 |
| 8036317 | Phase/gain imbalance estimation or compensation Apparatus and methods for estimation and compensation of phase imbalance and gain imbalance are provided. 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... | 10/11/2011 |
| 8031812 | Method and circuit arrangement for symbol decision upon the reception of a signal including a quadrature signal pair The invention relates to a method and a circuit arrangement for deciding a symbol upon the reception of a signal including or coupled with a quadrature signal pair, wherein the decision is made by means of an analysis of the metric of at least one reception point to... | 10/04/2011 |
| 8019020 | Binary decoding for correlated input information Embodiments of the present invention provide methods and systems for decoding information in a communications system with an improved bit error rate. Correlated groups of bits are grouped, and joint information of the correlated bit groups is made available to the d... | 09/13/2011 |
| 8019021 | Carrier to interference and noise ratio (CINR) estimating method and device using preamble in orthogonal frequency division multiplexing (OFDM) A device and a method for estimating a Carrier to Interference-plus-Noise Ratio (CINR) in an Orthogonal Frequency Division Multiplexing (OFDM) system are provided. The CINR estimating method includes receiving a preamble symbol and transmitting subcarrier transmitte... | 09/13/2011 |
| RE42676 | Method for determining a boundary of an information element, a system, and an electronic device A method for determining a boundary of an information element, in which a repetition coded signal transmitted by satellites is received, which signal is modulated with information elements. A group of symbols forms one information element. A group of reference value... | 09/06/2011 |
| 7991080 | RFID decoding subsystem with decode module A radio frequency identification (RFID) decoding subsystem includes a pre-decode module and a decode module. The pre-decode module is coupled to process down-converted RFID signals into pre-decoded baseband data. The decode module is coupled to: enable a counting pr... | 08/02/2011 |
| 7978789 | Frequency shift keying modulator and applications thereof An FSK modulator and applications thereof are disclosed. The FSK modulator comprises a phase-locked loop, a frequency divider module, an image rejection mixer and a summing module. The phase-locked loop is operably coupled to generate a first oscillation from a refe... | 07/12/2011 |
| 7957491 | Digital technique of compensating mismatches between in phase and quadrature channels Methods and systems for filtering include accessing first and second signals produced from an input signal and producing first and second filtered outputs, which correspond to the first and second signals, based on a filtering characteristic. The filtering character... | 06/07/2011 |
| 7933362 | Multilevel QAM symbol timing detector and multilevel QAM communication signal receiver A multilevel symbol timing signal detector is provided, which is used for reliably detecting the symbol timing of a multilevel QAM signal. When an oversampling I signal is inputted to I-Signal Histogram Generator 610, the signal is subjected to 1-symbol lengt... | 04/26/2011 |
| 7929642 | Contactless integrated circuit card with real-time protocol switching function and card system including the same A contactless integrated circuit (IC) card can include: an analog interface block operable to demodulate a received radio frequency (RF) signal into multiple versions thereof according to a first plurality of communication protocols, respectively; a controller opera... | 04/19/2011 |
| 7929643 | Method of estimating fading coefficients of channels and of receiving symbols and relative single or multi-antenna receiver and transmitter The method is for estimating the fading coefficients of a plurality of transmission channels on which signals to be sent, generated as a function of a sequence of symbols, are transmitted according to a particular modulation, e.g. AM-PSK modulation. The fading coeff... | 04/19/2011 |
| 7920652 | 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 components of output of a multiplier by a low pass filter, the output being the... | 04/05/2011 |
| 7916812 | 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 equal to the largest power of two multiple of the modulus within a prede... | 03/29/2011 |
| 7916811 | Method and apparatus for improved burst acquisition in a digital receiver A method for improving burst acquisition in a receiver includes receiving a signal, and performing a sync word search on the signal, wherein the sync word search includes performing a hybrid synchronization technique, the hybrid synchronization technique including b... | 03/29/2011 |
| 7912152 | Complex coefficient transversal filter and complex frequency converter A complex coefficient transversal filter using a SAW filter and a complex frequency converter using the complex coefficient transversal filter are provided, in which a first SAW filter receives a real signal as an input signal and generates a real component of a com... | 03/22/2011 |
| 7903762 | Multi-band TV tuner and method thereof A direct conversion multi-band TV tuner includes: a plurality of RF (radio frequency) paths for processing the RF signal and for generating a plurality of processed RF signals, respectively; and a TSC (tri-state chopper) based quadrature frequency converter for rece... | 03/08/2011 |
| 7903763 | Bandwidth selection for FM applications A system and method to optimize the quality of a modulated signal. In one aspect, an AM demodulator is used in conjunction with proper bandwidth selection of an FM signal. For example, the AM demodulator can be used to generate an instantaneous absolute value of the... | 03/08/2011 |
| 7899135 | Digital decoder and applications thereof A decoder includes a sample rate conversion module, a decoding module, and an error sensing module. The sample rate conversion module is operably coupled to convert, based on an error feedback signal, rate of an encoded signal from a first rate to a second rate to p... | 03/01/2011 |
| 7885360 | 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, performs quadrature demodulation on the quadrature modulated signal by using ... | 02/08/2011 |
| 7848460 | Interference suppression method and apparatus A composite baseband signal includes a desired signal component modulated according to a first modulation scheme and an interfering signal component modulated according to a second modulation scheme. Information is recovered from the composite signal by applying a p... | 12/07/2010 |
| 7835468 | 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) signal. The receiver also includes an impulse unit that may detect whether ... | 11/16/2010 |
| 7804918 | Apparatus for independently extracting streams from hierarchically-modulated signal and performing soft-decision, and method thereof An apparatus for independently extracting streams from a hierarchically-modulated signal and performing a soft-decision, and a method thereof are provided. The apparatus includes: a synchronizing unit for receiving a hierarchically-modulated signal configured of an ... | 09/28/2010 |
| 7796708 | Adaptive receiver loops with weighted decision-directed error A method for communication using a modulation scheme defined in a signal space includes determining demodulation confidence levels at a plurality of points distributed over the signal space. Weights are assigned to the respective points responsively to the demodulat... | 09/14/2010 |
| 7792220 | 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 baseband using a first input frequency and to mix a second signal substant... | 09/07/2010 |
| 7787571 | Method for the higher-order blind demodulation of a linear waveform transmitter Process for the blind demodulation of a linear waveform source or transmitter in a system comprising one or more sources and an array of sensors and a propagation channel. The process comprises at least the following steps: the sym... | 08/31/2010 |
| 7782983 | Method and system for demodulation of a differential Loran C signal A system for demodulation of the Loran Data Channel transmitted over the Enhanced Loran (eLoran) system including a quadrature filter. The quadrature filter calculates the real and quadrature phase components of a received ninth pulse. The resultant components are u... | 08/24/2010 |
| 7756222 | Adaptive quantization method and apparatus for an OFDM receiver A quadrature frequency division multiplexing (“OFDM”) wireless receiver, including methods and devices for adaptive quantization of OFDM signals according to modulation and coding schemes and sub-carrier frequency responses, is provided. Efficient quantization m... | 07/13/2010 |
