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"I hate what they've done to my child...I would never let my own children watch it. "
Vladimir Zworykin, television pioneer ; Talking about an invention in which he played a critical role.
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| Number | Title | Issue Date |
| 8138824 | Recursive demodulation apparatus and method A recursive demodulation apparatus is provided. Therecursive demodulation apparatus, including: a segment generation unit dividing data symbols with a residual frequency or phase error into a predetermined number of data symbols, and generating a plurality of segmen... | 03/20/2012 |
| 8085088 | Quadrature signal demodulator circuitry suitable for doppler ultrasound Quadrature signal demodulator circuitry for demodulating multiple related input signals into respective pairs of quadrature signals for selective combining to provide a composite pair of quadrature signals with a maximized signal-to-noise ratio (SNR). ... | 12/27/2011 |
| 8044713 | Receiving circuit and method for receiving an amplitude shift keying signal A receiving circuit and method for receiving an amplitude shift keying signal is provided. At least one exponent signal, an exponent-removed in-phase signal, and an exponent-removed quadrature-phase signal are generated from an in-phase input signal and a quadrature... | 10/25/2011 |
| 7876149 | Harmonic quadrature demodulation apparatus and method thereof Disclosed herein is a harmonic quadrature demodulation apparatus and method. The harmonic quadrature demodulation apparatus includes an input terminal for externally receiving an input focused signal, a harmonic phase estimation unit for estimating a second-order ha... | 01/25/2011 |
| 7782128 | Sign detection device and associated method A sign detection device including a first comparing device for comparing a first input signal with a first threshold signal in a first period and a second period to generate a first output signal; a second comparing device for comparing a second input signal with a ... | 08/24/2010 |
| 7692485 | Modulation method with insertion of semi-pilot symbols Method and device for modulating a signal comprising data symbols and reference symbols, characterized in that it comprises at least one step (3) wherein semi-pilot symbols are introduced that transport less information than the symbols customarily used but e... | 04/06/2010 |
| 7671670 | Device for demodulating a signal containing information being conveyed by phase shift keying The invention relates to a device for demodulating an input signal containing information being conveyed by phase modulation of a carrier wave. A transmitter generates a signal controlling a phase variation in the carrier wave, for each symbol having N cycles, N bei... | 03/02/2010 |
| 7619466 | Quadrature demodulator A quadrature demodulator includes a reception section which receives a signal transmitted by an RFID tag and containing a specific pattern and data following the specific pattern and multiplies the reception signal by a local signal to generate an I-signal, while mu... | 11/17/2009 |
| 7514993 | IQ demodulator A method and apparatus for the demodulation, filtering, decimation and optional voltage multiplication of modulated signals to produce in-phase and quadrature outputs using a discrete time architecture. ... | 04/07/2009 |
| 7486131 | Quadrature demodulator and interrogator In a receiving section, a first mixer and a second mixer generate an I signal and a Q signal from a modulated reception signal, a local signal, and a local signal obtained by shifting a phase by 90 degrees. These I signal and Q signal are supplied to a digital signa... | 02/03/2009 |
| 7426246 | Dual layer signal processing in a layered modulation digital signal system Systems and methods for receiving layered modulation for digital signals are presented. An exemplary apparatus comprises a tuner for receiving a layered signal and producing a layered in-phase signal and a layered quadrature signal therefrom, an analog-to-digital co... | 09/16/2008 |
| 7423987 | Feeder link configurations to support layered modulation for digital signals Systems and methods are disclosed for feeder link configurations to layered modulation. One feeder link system employs feeder link spot beam to antennas in distinct coverage areas to enable frequency reuse. Another system employs narrow beam width feeder link antenn... | 09/09/2008 |
| 7415078 | Demodulation for phase modulation A method and pre-processor for processing a MCPM signal including a phase multiplier for multiplying a MCPM signal by a scaling factor. The pre-processor also includes a frequency shifter for shifting the scaled MCPM signal to create a frequency offset. The pre-proc... | 08/19/2008 |
| 7409015 | Adaptive modulation scheme based on cutoff rate with imperfect channel state information A cutoff rate may be used to determine an optimal binary input distribution for a communications system which operates with imperfect receiver channel state information (CSI) at the receiver. First, the cutoff rate may be evaluated and used to analyze the optimal bi... | 08/05/2008 |
| RE40376 | Radio apparatus carrying out automatic gain control and gain control method A fading rate of a mobile terminal unit is estimated by a fading rate estimation unit and an optimum step constant is decided by a step constant determiner depending on the estimated fading rate. This step constant is fed back to a feedback data calculator, so that ... | 06/10/2008 |
| 7366489 | Mobile communication apparatus A transceiver suitable for larger scale of integration employs direct conversion reception for reducing the number of filters. Also, the number of VCOs is reduced by utilizing dividers to supply a receiver and a transmitter with locally oscillated signals at an RF b... | 04/29/2008 |
| 7366257 | Carrier recovery device of digital TV receiver A carrier recovery device of a digital TV receiver is disclosed, which can stand a multiple path noise. In the carrier recovery device, it is possible to recover a carrier with a phase error component of the carrier existing on data blocks as well as a carrier signa... | 04/29/2008 |
| 7362814 | Memoryless spectrum correction algorithm for non-ideal I/Q demodulators An algorithm for correcting the output of an analog I/Q demodulator without the need for calibration or storing state information. The output of the analog I/Q demodulator is digitized, and the discrete-time samples are divided into segments. A digital frequency tra... | 04/22/2008 |
| 7362827 | System and method for the demodulation of IFF signals A method for the decoding of a signal in an interrogation/response type of communications system, the received signal being formed by a video signal and a signal containing the data, wherein the method comprises at least the following steps: 1) transposing the recei... | 04/22/2008 |
| 7359366 | Uplink ranging system and method in OFDMA system Disclosed is a ranging system and method in an OFDMA system. The ranging system includes complex exponential twiddle storage units for respectively storing complex exponential twiddle factors corresponding to a timing error, complex multipliers for respectively comp... | 04/15/2008 |
| 7356324 | Mobile radio receiver device The invention is directed to a receiver arrangement, for example, in a mobile radio, which allows the use of slowly locking phase locked loops for a point-to-point connection between two transceivers, even in the case of a heterodyne receiver structure. The need to ... | 04/08/2008 |
| 7349677 | Hardware efficient RF transceiver I/Q imbalance compensation based upon taylor approximation Radio transceiver circuitry includes I/Q imbalance compensation logic within at least one of a digital modulator or a digital demodulator, depending upon whether the I/Q imbalance compensation block is compensating for I/Q imbalance in a transmit path or in a receiv... | 03/25/2008 |
| 7349493 | Demodulation with separate branches for phase and amplitude A receiver architecture is disclosed for use in Time-Division Multiple Access (TDMA) and related digital radio applications which combines the principal benefits of the conventional hard-limiting and linear receiver architectures to support switched-antenna diversit... | 03/25/2008 |
| 7349486 | System and method for recognizing zero-amplitude symbols in a QAM signal and digital receiver incorporating the same A system for, and method of, recognizing zero-amplitude symbols in a quadrature amplitude modulated (QAM) signal and a digital receiver incorporating the system or the method. In one embodiment, the system includes: (1) an amplitude detector that extracts a candidat... | 03/25/2008 |
| 7349483 | Communications device with doppler frequency estimation functions A communications device with the capability of accurately estimating Doppler frequency for improved wireless communication. At radio frame intervals, a complex time-domain response measurement unit obtains complex time-domain response signals representing the charac... | 03/25/2008 |
| 7336729 | Digital signal processing based de-serializer A DSP based SERDES performs compensation operations to support high speed de-serialization. A receiver section of the DSP based SERDES includes one or more ADCs and DSPs. The ADC operates to sample (modulated) analog serial data and to produce digitized serial data ... | 02/26/2008 |
| 7336702 | Jitter detecting apparatus and phase locked loop using the detected jitter A jitter detecting circuit and a phase locked loop using the detected jitter are provided. A jitter detecting circuit detecting a jitter value of a signal which is converted into a digital signal from an analog signal input, wherein the jitter value detecting circui... | 02/26/2008 |
| 7336717 | Receiver circuit, in particular for a mobile radio A radio receiver with a low intermediate frequency has a first mixer stage that can be fed with a modulated input signal and at whose output a complex intermediate frequency signal can be derived. Connected downstream of the first mixer stage is a limiting amplifier... | 02/26/2008 |
| 7336735 | Viterbi decoder Viterbi decoder for decoding a received sequence of data symbols which are coded using a predetermined coding instruction is provided. The Viterbi decoder includes a branch metric calculation circuit for calculation of branch metrics for the received sequence of cod... | 02/26/2008 |
| 7336744 | Digital baseband receiver including a cross-talk compensation module for suppressing interference between real and imaginary signal component paths A digital baseband (DBB) radio frequency (RF) receiver used for receiving and processing a wireless communication signal. The DBB RF receiver includes a demodulator, an analog to digital converter (ADC) and a digital cross-talk compensation module. The demodulator o... | 02/26/2008 |
| 7336732 | Carrier frequency detection for signal acquisition A carrier frequency in a filtered received M-ary phase-shift keyed (MPSK) modulated signal having in-phase and quadrature components is detected by processing the filtered received signal to remove modulation components and thereby generate a test signal at the carr... | 02/26/2008 |
| 7336731 | Demodulator with phase-adjusting function A demodulator with a phase-adjusting function including a detector including a delay detector delaying an input signal in delaying stages using a first clock obtained by frequency-dividing a sampling-clock at a first-ratio to output a delayed modulated signal, the s... | 02/26/2008 |
| 7321735 | Optical down-converter using universal frequency translation technology A method and system for converting an optical signal to electrical information signals, including demodulated baseband information signals and modulated baseband signals at multiple harmonics. In an embodiment, the optical information signal is amplitude modulated w... | 01/22/2008 |
| 7319719 | Parallel equalization for systems using time division multiple access An equalization circuit is provided. The equalization circuit includes an input adapted to receive signals from a communications channel. The equalization circuit further includes a plurality of equalizer circuits coupled to the input and operable to generate a plur... | 01/15/2008 |
| 7317772 | Multi-mode variable rate digital cable receiver Carrier signals modulated by information (video and/or data) signals are received through a cable and are converted to modulated signals at an intermediate frequency. The IF signals are sampled at a particular frequency to produce digital information signals. The di... | 01/08/2008 |
| RE39983 | Carrier injecting waveform-based modulation scheme for reducing satellite transponder power requirements and earth terminal antenna size A QPSK modulation scheme uses a data spreading mechanism to rob a relatively limited portion of available transmitter power, and inject into the QPSK waveform a prescribed amount of carrier signal power, through which detection and non-regenerative extraction of the... | 01/01/2008 |
| 7315587 | Demodulation method and apparatus based on differential detection system for π/4 shifted QPSK modulated wave A demodulator of a differential detection system for a π/4 shifted QPSK or DQPSK modulation wave in digital communication. The demodulator includes a differential detector connected to receive orthogonal components of the modulation wave, a corrector connected to r... | 01/01/2008 |
| 7315578 | Fast soft value computation methods for gray-mapped QAM A method and apparatus use unified equations to provide computationally efficient but exact solutions to bit soft value computations for Gray-coded QAM symbols in a received communication symbol as compared to carrying out region-specific equations that are keyed to... | 01/01/2008 |
| 7313748 | FEC decoder and method A method is described for FEC decoding a signal which has become affected by transmission errors, the original signal being transmitted together with parity data. The method comprises: receiving (5) the original signal (DATA) and parity data (ECC DATA) with e... | 12/25/2007 |
| 7310369 | SNR-related parameter estimation method and system A method for estimating an SNR-related parameter, such as ES/N0, from one or more symbols. The number of symbols within a predetermined number of symbols that fall within one or more collection areas is counted. The count is then associated wit... | 12/18/2007 |
