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| Number | Title | Issue Date |
| 7505531 | Signal communications system and method for noisy links A system and method for communicating signals over a noisy channel is provided wherein an input signal may be sampled and modulated to make the signal more noise insensitive. In accordance with one embodiment, of the invention, an signal code modulation (SCM) scheme... | 03/17/2009 |
| 7463709 | Method and apparatus for generating a synchronization sequence in a spread spectrum communications transceiver A novel and useful acquisition and synchronization mechanism for spread spectrum communication systems whereby a synchronization sequence comprising a plurality of known symbols spaced apart by predefined time delay intervals is transmitted as the start of packet si... | 12/09/2008 |
| 7460623 | Digital two-stage automatic gain control A digital automatic gain control circuit is disclosed. The circuit includes a selector, a scaler, a detector, a gain adjustor and a controller. In one exemplary aspect, the selector receives an input signal having two components, namely, the in-phase (I) and quadrat... | 12/02/2008 |
| 7460628 | Synchronous clock generation apparatus and synchronous clock generation method A synchronous clock generation apparatus including a multiplier for multiplying a horizontal synchronizing signal by a horizontal synchronizing pulse signal to generate multiplication data, a gain variable digital LPF for extracting only DC components from the multi... | 12/02/2008 |
| 7457379 | Adaptive multi-step combined DC offset compensation for EDGE 8-PSK A method to perform DC compensation on a Radio Frequency (RF) burst transmitted between a servicing base station and a wireless terminal in a cellular wireless communication system that first receives the RF burst modulated according to either a first or second modu... | 11/25/2008 |
| 7457383 | Receiving LSI device and receiver using the same A receiving large scale integrated circuit (LSI) device, including a demodulator which includes two signal processing circuits to demodulate two diversity signals to form a demodulated signal, a decoder which decodes the demodulated signal in accordance with an erro... | 11/25/2008 |
| 7453951 | System and method for the transmission of an audio or speech signal A system and method for transmitting an analog signal. The analog signal is converted into complex numbers such that two successive audio samples respectively form a real part and an imaginary part of a respective complex number. The complex numbers are then dispers... | 11/18/2008 |
| 7453935 | Multi-pair gigabit ethernet transceiver having decision feedback equalizer Various systems and methods providing high speed decoding, enhanced power reduction and clock domain partitioning for a multi-pair gigabit Ethernet transceiver are disclosed. ISI compensation is partitioned into two stages; a first stage compensates ISI components i... | 11/18/2008 |
| 7450634 | Decision feed forward equalizer system and method An equalizer and corresponding methods is arranged and constructed to mitigate adverse effects of a wireless channel (300). The equalizer includes a delay line (503) coupled to an input signal (501) and comprising a delay circuit coupled to an o... | 11/11/2008 |
| 7450627 | Wireless communication synchronization A method of communicating among wireless devices includes providing a frequency hopping schedule to a target device. The frequency hopping schedule includes a sequence of frequencies. The method also includes, at the target device, alternately sleeping and listening... | 11/11/2008 |
| 7447263 | Processing digital data prior to compression A method includes receiving an original string of bits where each of the bits represents one of two possible logic levels. The string of bits also carries information. A new string is formed, based on the original string, which contains all of the information of the... | 11/04/2008 |
| 7447260 | Equalizer, equalization method, and transmitter An equalizer includes a waveform detection circuit, an equalization transmission circuit, and an equalization parameter setting circuit. The waveform detection circuit observes a first characteristic parameter of a first input signal. The equalization transmission c... | 11/04/2008 |
| 7443910 | PHY control module for a multi-pair gigabit transceiver A method for controlling operation of a multi-pair gigabit transceiver. The multi-pair gigabit transceiver comprises a Physical Layer Control module (PHY Control), a Physical Coding Sublayer module (PCS) and a Digital Signal Processing module (DSP). The PHY Control ... | 10/28/2008 |
| 7443904 | Scrambling system and method for peak power reduction in MC-CDMA, and recording medium for storing corresponding program Disclosed is an MC-CDMA scrambling system and method, and a recording medium for storing a program thereof. A transmitter receives user's bit streams, uses a fixed scrambling code, determined according to the user's orthogonal code combinations or the number of user... | 10/28/2008 |
| 7440524 | Channel estimation in a wireless transmission system A GSM communication system uses a channel estimator to generate a channel impulse response estimate from received bursts. Preferred embodiments of such a system include a first correlation unit that uses N midamble bits to evaluate received signals and produce first... | 10/21/2008 |
| 7436892 | Method and apparatus for coding in a telecommunications system First and second transmission links are established with a remote station. An information signal is encoded to provide an encoded information signal having more bits than the information signal. First and second transmission signals are provided wherein each transmi... | 10/14/2008 |
| 7433434 | Communication channel tracking apparatus Apparatus are provided for a communication signal processing apparatus having a channel estimator configured to generate a first channel estimation at a first time point, a linear predictor coupled to the channel estimator, and an adaptive filter coupled with the li... | 10/07/2008 |
| 7433419 | ICI cancellation method for an OFDM system In the ICI cancellation method for OFDM communication system, a receiver performs channel estimation using pilot subcarriers included in transmission signals transmitted from at least one transmitter. The transmitter generates the transmission signal in which pilot ... | 10/07/2008 |
| 7430257 | Multicarrier sub-layer for direct sequence channel and multiple-access coding Carrier Interferometry (CI) provides wideband transmission protocols with frequency-band selectivity to improve interference rejection, reduce multipath fading, and enable operation across non-continuous frequency bands. Direct-sequence protocols, such as DS-CDMA, a... | 09/30/2008 |
| 7428260 | Unified MMSE equalization and multi-user detection approach for use in a CDMA system A unified minimum mean square error (MMSE) equalization/multi-user detection (MUD) approach for demodulating direct sequence CDMA (DS-CDMA) signals is described. In at least one embodiment, the unified approach is capable of generating a variety of cost-effective re... | 09/23/2008 |
| 7424073 | Orthogonal frequency division multiplexing (OFDM) receiver, OFDM receiving circuit and OFDM diversity reception method An Orthogonal Frequency Division Multiplexing (OFDM) signal having a symbol defining a transmission unit is produced by dividing data streams into a plurality of carriers within a predetermined bandwidth and prepared with orthogonal modulation. A transform unit havi... | 09/09/2008 |
| 7424072 | Receiving apparatus and receiving method An average power indicating channel characteristics is outputted from a reference value calculation unit as a reference value. An interference level corresponding to the degree of influence by frequency selective interference is outputted from an interference detect... | 09/09/2008 |
| 7421055 | Signal processing apparatus and signal processing method In order to output an analog signal from which unnecessary out-of-band noise components are appropriately removed in accordance with digital data to be reproduced, a reproduction frequency determination circuit and cutoff frequency selection circuit detect the frequ... | 09/02/2008 |
| 7406117 | XDSL multi-hybrid modem with power spectral density shaping Power spectral density shaping can be used in an XDSL system in order to adjust power spectral density properties of signals transmitted by an XDSL modem. The XDSL modem may include a power spectral density shaping filter, which can be adjusted to change the power s... | 07/29/2008 |
| 7400686 | Apparatus and method for improved performance in radio telecommunication systems that use pulse-shaping filters A apparatus and method for improved performance in radio telecommunications systems, and in particular multi-carrier code division multiple access (MC-CDMA) networks that employ pulse-shaping filters on the transmit side of a radio link. In order to more accurately ... | 07/15/2008 |
| 7400688 | Path metric normalization Path metric normalization in calculating trellis-based algorithms is improved by normalizing the path metric with an average value (rather than a maximum or a minimum) of the path metrics. Using an average rather than a maximum or a minimum provides various advantag... | 07/15/2008 |
| 7400673 | Method of determining and displaying powers of code channels and analysis device The invention relates to an analysis device and a method of determining and displaying powers of code channels of a CDMA signal, the powers of the individual code channels being determined and shown on an output device. The powers of the individual code channels are... | 07/15/2008 |
| 7388918 | Apparatus and method for the transparent upgrading of technology and applications in digital radio systems using programmable transmitters and receivers In a digital radio system including a transmitter unit and at least one receiver unit, changes to the system can implemented without modifying the hardware components by providing the transmitter unit and the receiver unit with processing capability. With respect to... | 06/17/2008 |
| 7388939 | Fractional-R frequency synthesizer A fractional-R synthesizer having a divider with rational increments and configurable in rational steps able to generate a plurality of frequencies in rational increments from a reference frequency. A voltage-controlled oscillator frequency (fVCO) is rela... | 06/17/2008 |
| 7386077 | Receiver diversity technique for wireless communications An electronic circuit for decoding wireless communication signals comprises: a combiner adapted to receive one of an incoming time diverse or frequency diverse signal representing blocks of encoded symbols. The blocks of symbols have been transmitted by a plurality ... | 06/10/2008 |
| 7386084 | Method and system for pattern-independent phase adjustment in a clock and data recovery (CDR) circuit Aspects of the pattern-independent phase adjustment system includes a single output data XOR gate coupled to a differential input data signal and a bias voltage through a first variable resistor. A single output reference XOR gate may be coupled to a latched differe... | 06/10/2008 |
| 7382841 | OFDM receiver for easily synchronizing base band signal An OFDM receiver has four antennas or more for receiving an OFDM modulated high frequency signal, and plural OFDM demodulators for inputting a baseband signal of a time domain thereto on the basis of the high frequency signal and outputting the baseband signal of a ... | 06/03/2008 |
| 7379493 | Signal analyzer for detecting distortions in signals A signal analyzer system comprises a differential operator configured to receive at least one input signal, and to determine at least one locus based on instantaneous differences in a relative rate of change between the at least one input signal and the at least one... | 05/27/2008 |
| 7372930 | Method to synchronize data and a transmitter and a receiver realizing said method A method to realize synchronization of data (DAT) sent from a transmitter (TX) to the receiver (RX), with a signal (SIG) available in the receiver (RX). The method includes the following steps: in the receiver (RX) generating trigger signals (T) from the signal (SIG... | 05/13/2008 |
| 7372892 | Simple and robust digital code tracking loop for wireless communication systems A simple and robust CTL is used for time tracking of multipath components of a spread spectrum signal transmitted over a wireless multipath fading channel. A digital code-tracking loop includes the implementations of despreading early and late data samples by use of... | 05/13/2008 |
| 7372928 | Method and system of cycle slip framing in a deserializer A method and system for cycle slip framing is disclosed. The method includes receiving an asynchronous signal and generating a synchronous pulse after receiving the asynchronous signal. The method further provides that the synchronous pulse be used to affect a bit s... | 05/13/2008 |
| 7369637 | Adaptive sampling rate converter Apparatus, methods and techniques for adjusting the phase offset used in sampling rate conversion uses a Farrow structure or the like to compensate for clock problems such as “clock jitter” and/or “clock drift” effects, which typically arise where one clock ... | 05/06/2008 |
| 7366266 | Space time block coded transmit antenna diversity for WCDMA A mobile communication system is designed with an input circuit coupled to receive a first plurality of signals (rj(i+τj), i=0−N−1) during a first time (T0-T1) from an external source and coupled to receive a second plurality... | 04/29/2008 |
| 7366243 | Methods and apparatus for transmitting non-contiguous spread spectrum signals for communications and navigation A technique for transmitting a spread spectrum signal using plural non-contiguous frequency bands separated by segments of frequency spectrum excluded from use involves: generating a digital time-domain spread spectrum signal; converting the time-domain signal to a ... | 04/29/2008 |
| 7362823 | Maximum ratio transmission An arrangement where a transmitter has a plurality of transmitting antennas that concurrently transmit the same symbol, and where the signal delivered to each transmitting antenna is weighted by a factor that is related to the channel transmission coefficients found... | 04/22/2008 |
