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7623890 |
Receiver
A receiver accepts a digital signal having an upper side digital signal located in a higher frequency range on a frequency axis than an analog signal, and a lower side digital signal located in a...
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7623602 |
Iterative interference canceller for wireless multiple-access systems employing closed loop transmit diversity
An interference-canceling receiver processes coded, multiple-access, spread-spectrum transmissions that propagate through frequency-selective communication channels from multiple transmit antennas...
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7623594 |
Satellite receiver system
An SDARS receiver for use with at least two antennae, each of which receives bitstreams from a first satellite, bitstreams from a second satellite, and bitstreams from a terrestrial repeater,...
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7623592 |
Reduced space time transmit diversity (STTD) interference transmission method
Disclosed is a transmission method wherein n antennae emit each symbol with a spread spectrum code, where the codes are the same for n antennae at each transmission considered from k transmissions,...
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7623579 |
Method of demodulating OFDM type signals in the presence of strong co-channel interference signals
A method of demodulating a signal in a transmission system where the modulation includes several substantially orthogonal subcarriers, and the vector of the propagation channel H[n,k] is known or...
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7620372 |
Communication device, method for controlling communication, game machine, and game system
A technology for realizing real-time frequency hopping in an environment containing a plurality of masters. A game machine includes a plurality of communication modules which carry out the...
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7620130 |
Wireless diversity receiver using a combiner with control weights that are based on reported transmission power
A wireless communication apparatus with a plurality of antennas which receive a wireless reception signal from a secondary communication apparatus, and a combiner which combines signals from the...
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7620128 |
Minimum mean squared error approach to interference cancellation and maximum likelihood decoding of space-time block codes
Block-encoded transmissions of a multi-antenna terminal unit are effectively detected in the presence of co-channel interfering transmissions when the base station has a plurality of antennas, and...
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7620117 |
Apparatus and method for encoding/decoding space time block code in a mobile communication system using multiple input multiple output scheme
Disclosed is an apparatus and method for encoding/decoding a space time block code in a mobile communication system using a multiple input multiple output scheme. In a transmitter employing a...
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7620113 |
Selectively changing demodulation modes depending on quality of received signal or a control signal
A demodulation apparatus includes a first demodulator for receiving a first received subcarrier and demodulating it by a first demodulation mode, a second demodulator for receiving a second...
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7613259 |
Mobile receiver phase correction circuit
A mobile communication system is designed with an input circuit coupled to receive a first plurality of signals (r j (i+τ j ), i=0−N−1) during a first time (T 0 -T 1 ) from an external source...
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7613248 |
Signal processing with channel eigenmode decomposition and channel inversion for MIMO systems
Techniques for processing a data transmission at a transmitter and receiver, which use channel eigen-decomposition, channel inversion, and (optionally) “water-pouring”. At the transmitter, (1)...
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7613245 |
Method and apparatus for multiplexing data and control information in wireless communication systems based on frequency division multiple access
An apparatus for transmitting data in a frequency division multiple access based communication system is disclosed. The apparatus includes a symbol block generator for generating a symbol block in...
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7609794 |
Reduced complexity sliding window based equalizer
Data estimation is performed in a wireless communication system using both oversampling and multiple reception antennas. A receive vector is produced for each antenna at a sampling interval which...
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7609793 |
Radio receiver and radio receiving method
According to an aspect of the present invention, there is provided with a radio receiver including: one or more antenna which receives radio signals; a plurality of filters which selectively output...
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7609792 |
Multiple-input multiple-output multichip transceiver with correlated clock signals
A multichip transceiver operates as part of a multiple-input multiple-output communication system. First receiver circuitry on a first integrated circuit processes radio-frequency (RF) signals...
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7609788 |
Receiver apparatus using maximum-likelihood-determination
A metric calculating unit calculates a metric based on a provisional determination of a transmission signal and a reception signal. A lattice-point-range setting/estimate-symbol generating unit...
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7609771 |
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...
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7606320 |
Apparatus and method for space-frequency block coding/decoding in a communication system
An apparatus and method for SFBC coding and decoding in a communication system using a plurality of (N t ) Tx antennas are provided. In a transmitter using N t transmit antennas, a pre-coder...
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7606318 |
Method of space-time encoding and decoding for frequency selective fading channel
The invention discloses a space-time encoding and decoding method for a frequency selective fading channel, comprising: an encoder takes two independent data fields of a time slot in input data as...
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7602810 |
Transmission of generic digital messages through a microprocessor monitoring circuit
Embodiments of the invention concern a method for transmitting digital messages through a microprocessor monitoring circuit of specific type and integrated to a microprocessor, each message...
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7599454 |
Method and apparatus for symbol alignment in diversity signal reception
Methods and apparatus taught herein provide for symbol alignment between diversity signals in a communication receiver. For example, in one embodiment, a method of symbol aligning diversity signals...
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7599453 |
Doppler spread estimation for OFDM systems
A Doppler spread value of a channel in an Orthogonal Frequency Division Multiplexing (OFDM) system is estimated, wherein the channel comprises a plurality of carrier frequencies. Estimating...
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7599424 |
Antenna diversity technique for wireless communication
A receiver includes a demodulator that receives data packets each having a preamble and that generates spreading codewords by correlating a spreading code with the preambles of the data packets. A...
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7593494 |
System and method for canceling impulse noise
A system for canceling impulse noise comprises an adaptive impulse canceler and a combiner. The adaptive impulse canceler is configured to receive a common mode component of a received signal and...
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7593489 |
Iterative STBICM MIMO receiver using group-wise demapping
A STBICM MIMO receiver includes a plurality of demappers for demapping a plurality of complex symbols transmitted by a STBICM MIMO transmitter. Each demapper is configured to have one or more...
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7593475 |
Space-time and/or space-frequency block coding using complex signal swapping
A method of space-time and/or space-frequency block encoding begins by receiving at least two complex signals, wherein each of the at least two complex signals includes a real component and an...
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7590202 |
Reduced-complexity antenna system using multiplexed receive chain processing
A method and associated system for processing a plurality of replicas of a signal in a signal processing chain, the method includes receiving each of the plurality of replicas of the signal at one...
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7590201 |
Method for detecting signal in multiple input multiple output system and receiving device of multiple input multiple output system
The present invention relates to a method for detecting a signal in an MIMO system. In the method, a received signal is detected in a zero forcing (ZF) method, and a first detection interval is...
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7590200 |
Receiver, a transmitter, a radio communication system and a channel estimation method
A radio communication system including a transmitter and a receiver ( 100 ) for transmitting MIMO channel signals is provided. The transmitter comprises a pilot signal insertion controller ( 93 )...
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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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7590172 |
Low bias estimation of small signal-to-noise ratio
A user equipment includes an estimator. The estimator is configured to select a first estimate of a signal-to-noise (SNR) ratio, calculate a first amplitude and first noise variance, calculate a...
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7587010 |
Complex filter circuit and receiver circuit
A pseudo-image signal producing section produces a pseudo-image signal imitating an actual image signal. An amplitude detection section detects the amplitude of the pseudo-image signal having...
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7587007 |
Transmitter diversity technique for wireless communications
A simple block coding arrangement is created with symbols transmitted over a plurality of transmit channels, in connection with coding that comprises only of simple arithmetic operations, such as...
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7587006 |
Receiving apparatus
A receiving device receives by multiple antennas a signal carrier-modulated with digital multivalued modulation, compares the distance between received signal points with a threshold preliminarily...
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7586992 |
Apparatus and method for channel estimation and cyclic prefix reconstruction in an OFDM-STBC mobile communication system
An apparatus and method for channel estimation and CP reconstruction in an OFDM-STBC mobile communication system are provided. An ISI canceller cancels ISI signal components from first and second...
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7583769 |
Operating GPS receivers in GPS-adverse environment
A system for operating a GPS receiver in a GPS-adverse environment includes a plurality of GPS receivers, a plurality of remote sensor interfaces (RSIs), and a computer management system. The GPS...
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7583766 |
System, and associated method, for utilizing block BLAST with PPIC in a MIMO multicode MC-CDMA system
A method for reducing interference in a MIMO MultiCode MC-CDMA system is disclosed wherein a BLAST algorithm is implemented over one block of correlation reception data y i and estimation channel...
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7583746 |
Wireless transmitting and receiving device and method
A wireless device, method, and signal for use in communication of a wireless packet between transmitting device and a wireless receiving device via a plurality of antennas, wherein a signal...
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7583739 |
Channel estimation device, channel estimation method, and wireless receiver
A channel estimation device is provided to achieve high-precision channel estimation in a MIMO or multicarrier wireless receiver. This channel estimation device is used in the wireless receiver...
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7583721 |
Spread spectrum modulator and demodulator
A spread spectrum modulator converts input sequences composed of digital symbols into n≧2 spread-spectrum sequences. The spread spectrum modulator can generate spreading code and can combine the...
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7583584 |
System and method for time diversity
A system and method for time diversity uses interleaving. To simplify the operation at both transmitters and receivers, a formula can be used to determine the mapping from slot to interlace at 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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7580489 |
Varying early-late spacing in a delay locked loop
A rake receiver tracks a component of a multipath information signal transmitted over a communication network. The rake receiver aligns and synchronized the component with a locally generated...
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7580488 |
Broadband modulation/demodulation apparatus and a method thereof
A modulator/demodulator apparatus and method for applications, such as communications, active sensing and navigation is disclosed. The modulator time-delays and time-scales (compresses or dilates)...
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7580479 |
Receiving method and receiver
Baseband BB input units input baseband received signals. An initial weight data setting unit sets weighting coefficients to be utilized in the interval of a training signal as initial weighting...
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7580442 |
Receiving apparatus, receiving method and program thereof
A receiving apparatus adjusts a path search window width in path search processing according to the saved timing information, after saving timing information detected at the time of cell search...
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7577160 |
MB-OFDM transmitter and receiver and signal processing method thereof
A method of improving frequency diversity of a signal that includes a plurality of orthogonal frequency division multiplexing (OFDM) symbols comprises receiving an input data sequence, mapping the...
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7577128 |
Multiplexing scheme for unicast and broadcast/multicast traffic
A method is provided for efficiently multiplexing interlaced broadcast traffic over a wireless network. The multiplexing scheme organizes unused slots in at least some base stations so that unicast...
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7577085 |
Multicarrier transmit diversity
Method, apparatus, and data packet format to implement transmit diversity in a multicarrier environment is disclosed. For diversity transmission operations, space frequency encoding techniques are...
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