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7630445 |
Establishing slot boundaries of slots of a diversity control feedback signal
Establishing slot boundaries includes receiving a feedback signal reflecting feedback information describing a signal modified according to a diversity parameter adjustment. The feedback signal...
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7627021 |
Interference canceling CDMA mobile station receiver
A receiver that provides interference cancellation in conjunction with RAKE processing. Signal parameters corresponding to each of a plurality of fingers corresponding to RAKE processing are...
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7623603 |
Intersymbol interference mitigation
Embodiments of the present invention provide for computing spatial covariances of intersymbol interference (ISI) and using the computed spatial covariances for ISI mitigation. Other embodiments may...
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7623566 |
Method and apparatus for demodulating signals processed in a transmit diversity mode
Demodulator architectures for processing a received signal in a wireless communications system. The demodulator includes a number of correlators coupled to a combiner. Each correlator typically...
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7623564 |
CDMA wireless system
Information symbols are transmitted simultaneously on independent streams using the same spreading code but from different transmit antennas at the transmitter. These simultaneous data stream could...
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7623563 |
Apparatus and method for detecting space-time multi-user signal of base station having array antenna
An apparatus and method for detecting a space-time multi-user signal are disclosed. The apparatus includes: an RF/IF processing unit for converting received signals through an array antenna into...
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7620099 |
WCDMA terminal baseband processing module having multi-path scanner module
A baseband processing module according to the present invention includes a multi-path scanner module. The multi-path scanner module is operable to receive timing and scrambling code information...
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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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7613229 |
Method and apparatus for combined finger management and finger lock for a multipath signals in a wireless communication system
A method of managing fingers for multipath signals in a wireless communication device. In one embodiment, the present invention recites receiving multipath signals at a wireless communication...
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7613228 |
M-Algorithm multiuser detector with correlation based pruning
A multiuser detector system with correlation based pruning including a parameter estimation module adapted to receive complex signals, and to produce estimated signature waveforms for each of K...
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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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7602838 |
Linear turbo equalization using despread values
A linear turbo-equalizer for use in a CDMA receiver equalizes a despread received signal (rather than the spread received signal) to suppress self-interference resulting from coupling between...
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7599423 |
Successive interference canceling for CDMA
Successive interference canceling for CDMA. ICI may result from a signal's multi-path effects, or by filtering/suppression of some of the component energy of the signaling waveforms. Energy...
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7596133 |
Apparatus and method for data transmission/reception using channel state information in wireless communication system
Disclosed is a method for transmitting and receiving data according to a channel state in a wireless communication system, the method includes measuring a characteristic of transmission channels...
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7593693 |
Adaptive antenna array with programmable sensitivity
Methods and apparatus for calculating spatial processing strategies in adaptive antenna array processing systems. Reference signal quality, intersymbol interference, data processed and received...
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7593449 |
Multicarrier sub-layer for direct sequence channel and multiple-access coding
Carrier interferometry (CI) methods may be used to provide transmission protocols having various desirable properties. Such properties may include interference rejection, reduced multipath fading,...
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7586976 |
Initial ranging detection for OFDMA systems
An initial ranging detection for an orthogonal frequency division multiple access (OFDMA) wireless communication system entails removing data sub-carriers from samples of an OFDMA signal in order...
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7586975 |
Code tracking apparatus and method under a multi-path environment in a DS-CDMA communication system
Disclosed is a code tracking apparatus and method under a multi-path environment in a DS-CDMA communication system. Through the steps of calculating fast path energy on a first path signal by...
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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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7583720 |
Wireless communication method and apparatus for assigning multi-paths to rake receiver fingers
A wireless communication method and system for assigning multi-paths to Rake receiver fingers. A Rake finger assignment database is established in which multi-path signals are categorized into a...
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7567609 |
Space-time multiuser detector in mobile communication system and method thereof
A space-time multiuser detector simultaneously reduces multiple access interference (MAI) and multipath channel distortion (MCD) that are disadvantages of mobile communication systems. The...
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7564891 |
Method of using long cellized codes in a joint detection system
The invention discloses a method of applying a long cell-code in a joint detection system. At transmitters, multiples of the spreading code (spreading factor) is taken as the length of the long...
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7558309 |
Low-interference UWB wireless communication system and processing method thereof and storage medium recorded program of the same
The proposed invention relates to the interference-free Ultra-Wide Band (UWB) wireless communication system using spreading codes with low correlation duration or Zero Correlation Duration (ZCD)...
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7558189 |
Image signal cancel-type heterodyne reception method and direct conversion orthogonal frequency division multiplexing reception method
According to an image signal cancel-type heterodyne reception method, I-phase and Q-phase intermediate-frequency signals can be modulated using two orthogonal signals, superimposed one on the...
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7551682 |
Method for improving the performance of a wireless network utilizing beamforming weighting vectors
Techniques are provided for selecting one or more downlink beamforming vectors for a wireless channel to create beamformed signals between a first wireless communication device, e.g., a base...
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7542408 |
Method of reducing inter-subcarrier interference in multicarrier communication systems and receiver using it
A receiver of a multicarrier communication system capable of reducing inter-subcarrier interfering signals is to be provided. Receive signals received by a receiving antenna are amplified by a...
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7539123 |
Subcarrier puncturing in communication systems
A circuit and method provides subcarrier puncturing by placing no information in subcarriers that suffer from channel impairments where they cannot deliver information. If no energy is placed in...
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7529289 |
Signal processing under attenuated transmission conditions
Signal processing under attenuated transmission conditions. Within an orthogonal signal space, the number of orthogonal signals that are used to transmit information from a transmitter to a...
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7526014 |
Correlator for spread spectrum receiver
The present invention discloses correlation architecture in the application of full-digital GPS (Global Positioning System) receivers. According to the present invention, a satellite C/A code...
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7515653 |
Digital broadcasting receiver, driving method thereof, and self-diagnosis method thereof
A digital broadcasting receiver, a driving method, and a self-diagnosis method thereof, are provided. The digital broadcasting receiver includes: a digital demodulator for demodulating a digital...
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7508864 |
Apparatus and method of canceling interference
Briefly, a wireless communication device having a receiver includes a pilot signal interference canceller and a linear interference suppressor is provided. The pilot signal interference canceller...
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7508860 |
Pulse signal generator for ultra-wideband radio transception and radio transceiver having the same
Provided are a pulse signal generator for UWB radio transception and a radio transceiver having the same. The pulse signal generator includes: an envelope generator generating a plurality of...
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7508796 |
Wireless base station, wireless frames synchronization detection method used therein, and recording medium on which program therefor is recorded
In a baseband processing unit in a node-B, a path search circuit includes a path capture unit, path track transfer unit, and channel estimation unit, all of which are primarily provided for the...
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7508748 |
Rate selection for a multi-carrier MIMO system
To select a rate for data transmission in a multi-carrier MIMO system with a multipath MIMO channel, a post-detection SNR SNR l (k) for each subband k of each spatial channel l is initially...
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7505538 |
Ultra wideband communication system, method and device with low noise reception
An ultra-wide band (UWB) waveform receiver with noise cancellation for use in a UWB digital communication system. The UWB receiver uses a two-stage mixing approach to cancel noise and bias in the...
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7505510 |
System and method for interference cancellation with multi-stage multi-user detection
Reduction of multiple access interference, in one example for asynchronous CDMA systems using long codes. In one aspect, parallel interference cancellation (PIC) implements a decoupled estimate,...
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7492809 |
Blind speech user interference cancellation (SUIC) for high speed downlink packet access (HSDPA)
This invention describes a blind speech user interference cancellation receiver for a high-speed downlink packet access (HSDPA). The key component of the blind SUIC receiver is a joint estimation...
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7492808 |
Decoding method using adaptive step-size algorithm for a space-time coded DS-CDMA system
Disclosed is a method for decoding received signals on communication channels between at least one transmit antenna and plural receive antennas in a space-time coded direct sequence (DS)-CDMA...
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7489747 |
Decision directed flicker noise cancellation
A decision directed flicker noise canceller for reducing flicker noise in a modulated input signal according to an embodiment of the present invention includes a decision circuit, a conversion...
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7480356 |
Method of and system for path selection in rich multipath conditions
A signal-path-selection method in a RAKE receiver includes producing C channel estimates from M received signal paths, determining a plurality of best signal paths using the C produced channel...
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7474692 |
Radio reception system
When once determined to be free of any demodulation error by an interference removing unit provided user by user, a replica signal calculated by the interference removing unit is subtracted from an...
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7474691 |
Sub-symbol parallel interference cancellation
Reduction of multiple access interference, in one example for asynchronous CDMA systems using long codes. In one aspect, parallel interference cancellation (PIC) implements a decoupled estimate,...
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7474688 |
System and method for detecting multiple direct sequence spread spectrum signals using a multi-mode searcher
System and method for detecting multiple direct sequence spread spectrum signals using a multi-mode searcher. A preferred embodiment comprises the specification of a hypothesis for a particular...
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7471932 |
System and method for embedding OFDM in CDMA systems
Systems and methods of combining OFDM and CDMA signals are provided. An OFDM packet data channel is overlaid over CDMA transmissions. The channel is scheduled slotwise between multiple users. In...
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7466743 |
CDMA wireless systems
Information symbols are transmitted simultaneously on independent streams using the same spreading code but from different transmit antennas at the transmitter. These simultaneous data stream could...
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7463609 |
Interference cancellation within wireless transceivers
The receiver includes a Rake receiver for separating a received signal into multipath components, an interference selector for selecting interference symbols corresponding to interfering paths and...
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7460833 |
Transmitting apparatus of communication system
A transmitting apparatus according to the present invention includes a prefilter for compensating a previously measured estimated impulse response of a communication system by assuming a...
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7457367 |
Detector and method for estimating data probability in a multi-channel receiver
A detector and method for estimating channel data probability in a multi-user or multiple-input multiple-output communication system includes summing conditional bit probabilities conditioned on...
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7457349 |
Method and apparatus for measuring timing of signals received from multiple base stations in a CDMA communication system
Unassigned finger processors are used to process and measure the arrival times of transmissions from base stations not in the active set. A first set of one or more base stations in active...
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7457347 |
Method and apparatus for estimating and correcting baseband frequency error in a receiver
A method and apparatus for estimating and correcting baseband frequency error in a receiver. In one embodiment, an equalizer performs equalization on a sample data stream and generates filter tap...
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