Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 8189718 | Adaptive optimization method and apparatus for average length The invention provides an average length adaptive optimization method and apparatus. An adaptive optimization method for the average length used for phase recovery comprising: a residual phase difference calculation step, for receiving a current phase of a digital s... | 05/29/2012 |
| 8179996 | 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. ... | 05/15/2012 |
| 8179997 | Real-time digital quadrature demodulation method and device for ultrasonic imaging system A real-time digital quadrature demodulation method and device for the ultrasonic imaging system are disclosed in this invention. In addition to a multiplying step and a filtering step, the method further comprises a sine and cosine table generating step for generati... | 05/15/2012 |
| 8160180 | Method and apparatus for transmitting high speed data by spectral decomposition of the signaling space A method and apparatus of high speed multi-dimensional signaling via a modem has a processing method of utilizing prolate pulses to optimize the transmission capacity of the channel. The modem includes a process that segments the channel bandwidth and allocates the ... | 04/17/2012 |
| 8144815 | Demand-assigned multiple access (DAMA) communication device and associated acquisition methods The communications terminal and acquisition method is for use with Continuous Phase Modulation (CPM) and Phase Shift Keying (PSK) modulation-type signals, each modulation-type signal having a respective preamble phasing sequence. The communications terminal may incl... | 03/27/2012 |
| 8139685 | Systems, methods, and apparatus for frequency control A receiver according to one embodiment includes a frequency control unit configured to receive a stream of samples including a plurality of received instances of a transmitted signal. The frequency control unit is configured to output a first correction signal (e.g.... | 03/20/2012 |
| 8139686 | Radio communication method, radio transmitting apparatus, and radio receiving apparatus A duplicating section duplicates a bit sequence to be input, and a 16 QAM section modulates a bit sequence of a duplicating source to form a symbol, a 16 QAM section modulates the duplicated bit sequence to form a symbol, an S/P section parallel converts the symbol ... | 03/20/2012 |
| 8126088 | Demodulator with signal preconditioner A method and apparatus for demodulating an input signal, for example, in a communications system, is disclosed. The apparatus includes a signal preconditioner and a demodulator. The signal preconditioner may include a low-pass filter and a hysteretic comparator that... | 02/28/2012 |
| 8121223 | Architectures for universal or software radio A system and technique for providing to flexible, programmable frequency estimators and spectrum analyzers that can operate over extremely large bandwidths and yet provide high spectral resolution are described. The acquisition time and hardware complexity of one te... | 02/21/2012 |
| 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 |
| 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 |
| 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 |
| 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 |
