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7616935 |
Method and apparatus for matching receiver carrier frequency
A carrier recovery method and apparatus using multiple stages of carrier frequency recovery are disclosed. A receiver uses multiple frequency generation sources to generate carrier signals used to...
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7616708 |
Clock recovery circuit
A clock recovery circuit comprising an initial delay select circuit, a delay locked loop and a clock synthesizer circuit is provided. The initial delay select circuit comprises an initial timing...
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7616606 |
Mechanism for avoiding triggering silent radio squelch circuits
A ‘smart’ sub-channel hopping control mechanism executes one or more sub-channel selection discriminators to enable the communications controller of a spectral reuse transceiver to delineate on...
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7613441 |
Radio wave reception device and radio wave clock
A received low-frequency standard radio wave, which is an amplitude modulation signal, is converted to an intermediate frequency signal Sa, and is output to a detection circuit and an AGC circuit....
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7606331 |
Frequency offset compensation in radio receiver
A solution for estimating frequency offset in a radio telecommunication system is provided. According to the solution, an estimate for frequency offset between a radio frequency carrier wave of a...
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7602835 |
Multi-rate spread spectrum composite code
A correlator despreads a P/N long code constructed from two or more constituent codes A, B, C having N, M and L elements respectively. In a third stage, L filter taps decorrelate elements of the...
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7596190 |
System, method, and apparatus for correction of code doppler shift
A method of signal reception according to one embodiment of the invention includes compensating for an estimated or measured Doppler shift during integration of a correlated signal. Such a method...
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7593490 |
Joint synchronizer and decoder
A joint synchronizer and decoder that implements two decision aided processes, which are referred to as “decision aided candidate selection” and “decision aided synchronization and...
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7590199 |
Hybrid frequency offset estimator
A hybrid carrier frequency offset estimator that uses data-aided and non-data-aided signal processing techniques to produce multiple candidates for the carrier frequency offset within a return...
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7590193 |
Frequency recovery apparatus and mobile broadcast receiver using the frequency recovery apparatus
A frequency recovery apparatus and a mobile broadcast reception system utilizing the frequency recovery apparatus are disclosed. The frequency recovery apparatus and the mobile broadcast receiver...
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7590164 |
Method and apparatus for efficient use of communication resources in a communication system
The frame of data is partitioned into a plurality of portions of data symbols. A plurality of channel elements is assigned to demodulate data symbols of correspondingly the plurality of portions of...
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7587188 |
Radio wave reception device, radio wave clock, and repeater
A received low-frequency standard radio wave, which is an amplitude modulation signal, is converted to an intermediate frequency signal Sa, and is output to a detection circuit and an AGC circuit....
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7587016 |
MIMO timing recovery
Multiple-input-multiple-output (MIMO) timing recovery. A novel approach is presented to perform timing recovery when processing the multiple received signals within a MIMO communication device....
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7587003 |
Method and device for carrier-frequency synchronization of a vestigial-sideband-modulated signal
A method and a device for carrier-frequency synchronization of a vestigial-sideband-modulated received signal (r VSB (t)) with a carrier signal (e j(2π(f T +Δf)t+Δφ) ), which is affected by a...
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7583758 |
Carrier detection applicable for SISO, MIMO, MISO, and SIMO communications
Carrier detection applicable for SISO, MIMO, MISO, and SIMO communications. A novel approach is presented to perform carrier detection for a signal found in any of a wide variety of communication...
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7583742 |
Multi-band DMT receiver
There is disclosed a receiver for receiving a multi-band DMT signal. The receiver includes a plurality of demodulators, each demodulator having a discrete Fourier transform and being provided to...
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7583740 |
Apparatus and method for tracking sampling clock in multi-carrier communication system
An apparatus and method for tracking a sampling clock are disclosed. The apparatus includes a compensating circuit compensating phases of a first and a second received symbols according to a...
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7581161 |
Method and system for widening the synchronization range for a discrete multitone multicarrier single pilot tone system
A system and method of widening the synchronization range for a discrete multitone multicarrier single pilot tone system includes detecting a first phase error in a received pilot tone; detecting a...
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7580497 |
Clock data recovery loop with separate proportional path
A clock data recovery loop that can be used over a wide range of data rates and maintain second-order behavior includes a nonlinear (e.g., Bang-Bang) phase detector, a charge pump, an RC loop...
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7580483 |
Trimming of local oscillation in an integrated circuit radio
A method and apparatus for trimming of a local oscillation within a radio frequency integrated circuit (RFIC) includes processing that begins when an RFIC receives a radio frequency (RF) signal...
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7580482 |
Joint, adaptive control of equalization, synchronization, and gain in a digital communications receiver
Various aspects and embodiments of the present invention derive statistics of received signal quality and use these statistics to jointly control operation of timing recovery, carrier recovery,...
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7577216 |
Guard interval and FFT mode detector in DVB-T receiver
For determining FFT and GI (guard interval) modes within a receiver, a correlation signal is generated from an in-phase and quadrature (I/Q) stream. An plurality of GI mode division signals are...
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7577215 |
Angle demodulation apparatus, local oscillation apparatus, angle demodulation method, local oscillation signal generating method, recording medium and computer data signal
An FM modulation signal is mixed with a pair of first local oscillation signals to be converted to a pair of base band signals. The base band signals are respectively mixed a pair of second local...
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7577214 |
OFDM signal receiver and receiving method
A receiver having a frequency-deviation detector which includes: a storage for locating and storing the frequency-domain symbol-signal in a two-dimensional data area on a two-dimensional space...
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7577206 |
OFDM signal receiving apparatus and method for estimating common phase error of OFDM signals using data subcarriers
An Orthogonal Frequency Division Multiplexing (OFDM) signal receiving apparatus and method of estimating a common phase error (CPE) using data subcarriers (and pilot subcarriers) instead of only...
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7574350 |
Passive data carrier with signal evaluation means for evaluating information of a self-clocking signal
A data carrier ( 2 ) that is developed for contactless receiving of a signal, wherein the data carrier ( 2 ) can be supplied with energy and information by the signal, provides data carrier...
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7573954 |
Apparatus and method for compensating IQ imbalance in OFDM system with carrier frequency offset
An apparatus and method of an OFDM system for compensating IQ imbalance. The apparatus includes a mixer module for mixing a wireless signal to generate a pair of in-phase and quadrature-phase...
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7573953 |
Method and apparatus for estimating SFO in digital receiver, and method and apparatus for compensating for sampling frequency using the estimated SFO in the digital receiver
A sampling frequency offset (SFO) estimation method for use in a digital receiver to estimate a correct SFO is disclosed. The method for estimating the SFO in the digital receiver includes the...
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7570718 |
Device and method for wireless communication and computer program
Disclosed herein is a wireless communication device which includes an RF processing unit and a baseband unit that carries out carrier tracking based on a signal after RF processing, in which the...
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7570717 |
Apparatus and method for pilot-less carrier acquisition of vestigial sideband (VSB) signal
A method for demodulating a carrier wave in a channel environment in which a pilot signal may be distorted, in a digital TV receiver, which may receive a vestigial sideband (VSB) modulated and...
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7567630 |
Data processing device including clock recovery from various sources
A data processing device is described having a first receive data input unit for inputting a first receive data stream into the data processing device, at least one second receive data input unit...
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7567629 |
Multiphase clock recovery
The invention represents a parallel and distributed approach to clock recovery based on multiple mutually phase shifted sample clock signals (åS) defining a set of orthogonal clock phases. The...
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7564927 |
Band averaging circuit and related method for carrier frequency offset estimation in a multi-band multi-carrier communication system
A band averaging circuit and a related method for estimating a carrier frequency offset are applied in a multi-band multi-carrier communication system. A packet of the multi-band multi-carrier...
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7558342 |
Circuits and methods for acquiring a frequency of a data bitstream
Circuits and methods for recovering a periodic signal from a data signal. One circuit generally includes (1) a recovery circuit configured to produce a reference signal from the data signal, (2) a...
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7558341 |
Carrier recovery apparatus and digital broadcast receiver using the same
Provided is a carrier recovery apparatus of an OOB QPSK receiver for an Open Cable System. The carrier recovery apparatus of the digital broadcast receiver includes a carrier recovery, an SNR...
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7558340 |
VSB receiver and carrier recovery apparatus thereof
There are provided a VSB receiver and a carrier recovery apparatus thereof, in which a carrier is recovered using a VSB modulated signal. In the VSB receiver, a digital processing part selects a...
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7555066 |
E8-VSB reception system
An E8-VSB reception system system is provided. A VSB receiver converts a received broadcast signal into a digital baseband signal in synchronization with a first symbol clock, converts a decision...
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7551694 |
Limiter based analog demodulator
A limiter based analog demodulator includes a power amplifier receiving a base-band signal and a local clock operating at the base-band frequency. A first multiplier receives an output from the...
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7551693 |
High-frequency HomePNA
A network device includes a HomePNA modem and means for synchronizing its clock with clocks of other HomePNA modems in the network in order to communicate at a higher frequency band. In one...
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7551692 |
Frequency recovery apparatus and method for use in digital broadcast receiver
A frequency recovery device and method, the method including a) dividing first data units and corresponding second data units delayed by time intervals, passing only parts of the data units from...
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7551691 |
Receiver for a multi-carrier communication system
A receiver for a multi-carrier communication system has a channel corrector ( 173 ) which receives an input signal (CDC 2 ) and a correction control signal (EC) to correct an amplitude and/or phase...
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7548598 |
Method and apparatus for iteratively improving the performance of coded and interleaved communication systems
A system and method for improving performance of a digital communication system using forward error correction and interleaving. In the system, the channel equalization values are iteratively...
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7545888 |
Apparatus for and method of controlling a digital demodulator coupled to an equalizer
A method of controlling a digital demodulator ( 922 ) coupled to an equalizer ( 930 ) includes the steps of generating an equalizer value ( 930 A), filtering ( 944 ) the equalizer value ( 930 A) to...
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7545887 |
Synchronous detection method and device
In a synchronous detection method, an input signal is averaged over at least first and second phase ranges of a target carrier wave within each period thereof to obtain at least first and second...
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7545861 |
Timing recovery circuit and timing recovery method
A timing recovery circuit for a receiver may include a timing error detector that generates a timing error based on differences between coefficients of a feed-forward filter and a feed-back filter....
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7542524 |
Radio wave receiver, radio wave reception integrated circuit, wave clock, and repeater
A circuit for canceling noise components is provided for a radio wave receiver which receives a long wave standard radio wave. The circuit includes a multiplier, a divider, a differentiation...
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7541966 |
Apparatus and method for demodulating a modulated signal
An apparatus for demodulating a modulated signal comprises an analog to digital converter ( 2, 12 ) for converting an analog modulated input signal to a digital signal. The analog to digital...
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7539255 |
Using multiple pilot signals for timing error estimation in digital subscriber line communications
A receiving modem ( 20 ) including functionality for adjusting the synchronization of its timing relative to a transmitting modem ( 10 ), by recovering timing from a plurality of pilot tones...
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7535976 |
Apparatus and method for integration of tuner functions in a digital receiver
A receiver to process a RF input signal having a plurality of channels includes a direct down conversion circuit, a demodulation circuit, and a local oscillator circuit. The direct down conversion...
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7529329 |
Circuit for adaptive sampling edge position control and a method therefor
A clock and data recovery circuit (CDR) for receiving high-speed digital data, and having an analog phase offset control capability, is improved by providing an adaptive sampling edge position...
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