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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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7620115 |
Space code block coding and spreading apparatus and method for transmission diversity and CDMA diversity transmitter and CDMA mobile station receiver using the same
A space code block coding and spreading apparatus for transmission diversity, a Code Division Multiple Access (CDMA) diversity transmitter using it, and a CDMA mobile station receiver for receiving...
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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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7620112 |
Adaptive basis functions in a multicarrier communication system
A method for transmitting a signal uses a channel impulse response to determine a sub-carrier frequency function for at least two different basis functions. For each of the at least two sub-carrier...
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7620111 |
Symbol interleaving
The invention relates to a method for communicating digital data using an orthogonal frequency division multiplexing (OFDM) transmission system ( 10 ) including at least one transmitter ( 600, 601...
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7620096 |
Equal BER power control for uplink MC-CDMA with MMSE successive interference cancellation
For a given decision order, MMSE successive interference cancellation (MMSE-SIC) can simultaneously maximize SIRs of all users. To further increase its efficiency, a power control (PC) algorithm,...
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7619963 |
OFDM signal frame generator, transmitter, signal transmission system and OFDM signal frame generating method
An OFDM signal frame generator includes a rate determiner configured to determine rate information to generate a signal frame to be transmitted as an OFDM signal based on a value of a received...
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7616716 |
Synchronisation in a receiver
A radio receiver is suitable for use in an OFDM wireless communications system, in which it is necessary to identify a timing point at a start of a frame. In order to ensure optimum performance of...
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7616704 |
Broadband multicarrier transmitter with subchannel frequency diversity for transmitting a plurality of spatial streams
A multicarrier transmitter assigns for each of a plurality of spatial channels, sets of the constellation symbols to subcarriers of each subchannel. Constellation symbol assignments to the...
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7616699 |
Method of soft bit metric calculation with direct matrix inversion MIMO detection
A telecommunication MIMO receiver implements soft bit metric calculation with direct matrix inversion MIMO detection. The receiver has a detector that detects data symbols in a received signal by...
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7616696 |
System and method to increase sector throughput in a multi-carrier operation
A multicarrier base transceiver system includes first control circuitry adapted to receive first control data and voice data from a communications network and arrange the received data into a...
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7616695 |
MIMO equalizer design: an algorithmic perspective
A receiver in a MIMO-OFDM system may estimate the transmitted signal by performing a QR decomposition on the channel response matrix. The receiver may utilize Givens rotations to perform the...
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7616678 |
Multi-carrier constant envelope signal scheme for power and bandwidth efficient communications
A technique for combining a plurality of signals to form a multi-carrier constant-envelope composite signal includes generating a constant-amplitude inphase (I) composite signal based on a majority...
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7616553 |
Apparatus and method for clock synchronization in a multi-point OFDM/DMT digital communications system
A multi-point communications system is set forth herein. The communications system comprises a transmitter for transmitting OFDM/DMT symbols over a predetermined number of bins across a...
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7613257 |
Synchronizing method for impulse radio network
A method to synchronize impulse radio signal in a receiver based on a cross-correlation between an input signal and a template pulse train is described. The method comprises the steps of receiving...
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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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7613244 |
System for communicating channel quality information
In transmitting channel quality information (CQI) by a mobile station (MS) in a communication system, the mobile station receives from a base station (BS) information of an allocation of a CQI...
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7613243 |
Interleaver and parser for OFDM MIMO systems
A MIMO wireless system includes a transmitter that has a transmitter having a parser that parses a bit stream into multiple spatial data streams and multiple interleavers corresponding to the...
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7613242 |
Method and system for multicarrier communication between a base station and subscribers of different bandwidths
A multicarrier base station communicates with subscriber stations of different bandwidth profiles by allocating time slots in downlink and uplink frames and subcarriers of a single multicarrier...
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7613234 |
Near-end, far-end and echo cancellers in a multi-channel transceiver system
A transceiver according to the present invention receives data from a plurality of frequency separated transmission channels from a complementary transmitter and includes an interference filter for...
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7613102 |
Apparatus and method for clock synchronization in a multi-point OFDM/DMT digital communications system
A multi-point communications system is set forth herein. The communications system comprises a transmitter for transmitting OFDM/DMT symbols over a predetermined number of bins across a...
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7613101 |
Receiving processing method and apparatus
The apparatus includes a receiver unit which receives data; and a guard interval combining unit which combines the whole of the guard interval of the data, which is received by the receiver unit,...
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7609795 |
Interpolation module, interpolator and methods capable of recovering timing in a timing recovery apparatus
The invention relates to an interpolation module, an interpolator, and methods capable of recovering timing, and in particular, to an interpolation module, an interpolator, and methods capable of...
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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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7609789 |
Phase noise compensation for MIMO WLAN systems
The present invention provides a method for reducing phase noise in OFDM systems by analyzing a time-dependent representation of the phase noise that changes in real time according to received...
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7609775 |
Radio communication apparatus and communication method
In a radio communication apparatus for forming a frame with a plurality of slots, and inserting a guard interval into each slot along with data for a mobile station to perform communication, a...
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7609774 |
Beamforming transceiver architecture with enhanced channel estimation and frequency offset estimation capabilities in high throughput WLAN systems
A method and system for transmitting bit streams in a telecommunication system, by combining a bit stream with a first portion of a preamble, applying power loading to the combined bit stream,...
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7609773 |
Method of determining the location of the FFT window and the delay spread for the platinum broadcast channel estimator
In one embodiment, the invention comprises a channel estimation method, comprising determining a FFT window position, and calculating a delay spread. In another embodiment, the step of determining...
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7609772 |
Apparatus and method for optimally compensating for imbalance between in-phase and quadrature-phase in a zero-IF OFDM receiver
An optimum I/Q imbalance compensating apparatus and method in a zero-IF OFDM receiver. In the apparatus, a first compensator generates a first symbol by removing interference from a second...
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7609750 |
Segment-wise channel equalization based data estimation
Data is estimated of a plurality of received spread spectrum signals by a wireless communication apparatus. The plurality of received communications are received in a shared spectrum. The received...
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7609611 |
Method for transmitting an offset modulated biorthogonal multicarrier signal (BFDM/OM)
The invention concerns a method for transmitting a biorthogonal multicarrier signal BFDM/OM, using a transmultiplexer structure providing: a modulating step, using a synthesis filter bank ( 11 ),...
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7609608 |
Method and apparatus for data transfer using a time division multiple frequency scheme with additional modulation
A method of data transmission according to one embodiment of the invention includes encoding a set of data values to produce a corresponding series of ordered n-tuples. The method also includes...
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7606319 |
Method and detector for a novel channel quality indicator for space-time encoded MIMO spread spectrum systems in frequency selective channels
In a JE, spread spectrum communication MIMO system where a demultiplexed packet is transmitted over multiple streams, two versions of a single CQI are disclosed: generalized SNR or constrained...
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7606317 |
Channel optimization system
A channel optimization system for use with a communications channel and method of separating and encoding signals associated with the communications channel. In one embodiment, the channel...
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7606316 |
MIMO-OFDM preamble for channel estimation
A preamble for a MIMO-OFDM system includes multiple training symbols. Each training symbol has a pattern in which data symbols and null symbols are transmitted on all tones and on all transmit...
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7602872 |
Scheduling apparatus and method in a multicarrier communication system
In multicarrier communication system using N subcarriers, in which a transmitter communicates with K receivers, the transmitter determines a channel quality information (CQI) feedback quantity...
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7602870 |
Symbol timing estimation in communication systems
A symbol timing estimation method is provided for use in a communication system, for example an orthogonal frequency division multiplexing system having a cyclic prefix extension CPE. Each symbol...
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7602855 |
Method and apparatus for singular value decomposition of a channel matrix
A method and apparatus for decomposing a channel matrix in a wireless communication system are disclosed. A channel matrix H is generated for channels between transmit antennas and receive...
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7602854 |
Method of receiving of OFDM signal having repetitive preamble signal
A method of receiving an orthogonal frequency division multiplexing (OFDM) signal. The method includes receiving sample signals from the OFDM signal, providing reference sample signals, calculating...
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7602853 |
Method and apparatus for channel estimation
The invention relates to DVB-T system, and in particular, to a channel estimation method for OFDM symbols. A plurality of symbols are received to generate a pilot response. A finite impulse...
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7602852 |
Initial parameter estimation in OFDM systems
A coarse estimate of a location of an information carrying part of a symbol in a received signal in a telecommunication system is generated. This involves generating correlation values by...
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7602697 |
Systems and methods for reducing the peak-to-average-power ratio in an OFDM-based system
In an exemplary embodiment, an orthogonal frequency division multiplexing (OFDM) system includes an OFDM transmitter and an OFDM receiver that is configured to receive OFDM signals from the OFDM...
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7599440 |
Downlink control channel allocation method in mobile communication system
A downlink control channel structure in a CDMA (Code Division Multiple Access) mobile communication system and its operating method are disclosed. Especially, a downlink control channel structure...
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7599422 |
Adjustable dual-band link
A communication system utilizing an adjustable link has at least a first data transmission circuit including at least a first communication link circuit. The first communication link circuit has a...
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7599282 |
Wide frequency offset correction using encoded interburst phase differences
Systems and methods for wide frequency offset synchronization are provided. A synchronization data sequence is encoded onto a series of OFDM frequency domain bursts as interburst phase differences...
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7596181 |
Apparatus and method for frequency synchronization in OFDM system
A method and apparatus are provided for frequency synchronization in an Orthogonal Frequency Division Multiplexing (OFDM) system, wherein the method includes the steps of transmitting OFDM symbols...
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7596114 |
Data transmission system in broadband wireless access system using band AMC and method thereof
Disclosed are a system for transmitting data using a band AMC in a broadband wireless orthogonal frequency multiplexing access system and a method thereof. In a broadband wireless communication...
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7596080 |
Method for distributing data on an OFDM time-frequency grid allowing for coordination of interferences and adaptive subcarrier frequency allocation, a base transceiver station, a base station controller and a mobile network therefor
The invention concerns a method for distributing data on an OFDM time-frequency grid for data transmission from and to mobile terminals in a mobile network allowing for coordination of...
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7594010 |
Virtual antenna array
A method of transmitting data across an electronic data communication system comprising a plurality of terminals that can send and receive data in the form of electromagnetic waves to and from at...
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7593742 |
Received communication signal processing methods and components for wireless communication equipment
A wireless transmit receive unit (WTRU) and methods are used in a wireless communication system to process sampled received signals to establish and/or maintain wireless communications. A...
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