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7636384 |
Method for detecting the orthogonal code CDMA signal
The present invention discloses a method for detecting orthogonal code CDMA signal implemented mainly through the following steps: estimating the total power of interference to the multi-path...
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7634033 |
Spread spectrum detection system and method
A system and method for detecting a spread spectrum encoded message within a received signal is described. The spread spectrum encoded message has an unknown code phase, unknown code frequency...
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7630690 |
Access burst detector correlator pool
A Node-B/base station has an access burst detector. The access burst detector comprises at least one antenna for receiving signals from users and a pool of reconfigurable correlators. Each...
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7623583 |
Apparatus and method for tracking a sampling clock of multi-carrier communication system
An apparatus and a method for tracking a sampling clock of a multi-carrier communication system are disclosed, the apparatus including a data removal module, a phase estimation module, and a...
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7616715 |
Method and system for estimating the speed of a mobile device in a network
A method for estimating the speed of a mobile device in a network is provided that includes selecting a correlation length from a plurality of possible correlation lengths. A correlation result is...
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7616609 |
Apparatus, and associated method, for selecting codes of a code set for coding data communicated during operation of multi-access communication system
Apparatus, and an associated method, for designing codes to be used to code data that is communicated in a multi-access communication system. A selected code is designed, based upon an initial...
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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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7606292 |
Sub-sequence accumulation filter and method
A parallel correlator and method includes temporarily storing in a series of P sequence registers, each of length R 1 , serial bit-sequences of a code of length N=P*R 1 . In a first-level of...
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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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7602834 |
System and method for determining a fine frequency offset of a received signal
A system and method for determining a fine frequency offset of a composite code spread spectrum signal is disclosed. The method includes despreading at least one component of the composite spread...
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7602845 |
Adaptive filter
The present invention relates to a filter apparatus and method having a fixed aspect for providing a predetermined selectivity and having an adaptive aspect for determining the frequency response...
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7599426 |
Use of adaptive filters in multiple access wireless systems employing predictable signals
A code division multiple access (CDMA) radio system uses an adaptive filter in a receiver to mitigate multipath radio propagation and to filter out interfering signals. Characteristics of an...
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7590396 |
Multimode communication device with shared signal path programmable filter
A multimode communication device with a shared signal path programmable filter and a method for utilizing a shared signal path programmable filter in a multimode communication device. Various...
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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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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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7580470 |
Apparatus for recovering E8-VSB map information and method thereof
A Kerdock decoder of the present invention generates correlation reliability from a relation between correlation values to output together with a Kerdock-decoded map data. A map deciding unit...
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7567533 |
Packet detection system, packet detection device, and method for receiving packets
A packet detector for a multi-band orthogonal frequency division multiplexing system includes a plurality of packet detection units each corresponding to a time frequency code for detecting packets...
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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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7551663 |
Use of correlation combination to achieve channel detection
Combinations of correlation results are used to achieve detection of multiple coded signals at a receiver in a wireless communications system. The code applied to signals includes a lower rate code...
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7548576 |
Self organization of wireless sensor networks using ultra-wideband radios
A novel UWB communications method and system that provides self-organization for wireless sensor networks is introduced. The self-organization is in terms of scalability, power conservation,...
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7545854 |
Doppler corrected spread spectrum matched filter
A method and apparatus for a spread spectrum matched filter with Doppler correction suitable for using in a radio frequency receiver. The system includes a signal sampler operable to receive signal...
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RE40716 |
CDMA receiver with parallel interference suppression and optimized synchronization
A receiver for transmission and parallel interference has multiple access interference suppression stages having K channels, each comprising a correlation device corresponding to a particular...
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7539240 |
Method and apparatus for parameter estimation in a generalized rake receiver
Exemplary received signal processing may be based on maintaining a model of received signal impairment correlations, wherein each term of the model is updated periodically or as needed based on...
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7539241 |
Packet detector for a communication system
Method and apparatus for packet detection is described. More particularly, a signal having sub-signals is received. The signal is quantized (“re-quantized”) to provide a quantized signal to...
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7536014 |
Apparatus and method for generating scrambling code in UMTS mobile communication system
A scrambling code generating apparatus of a downlink transmitter in a UMTS mobile communication system, which uses one primary scrambling code for separation of base stations and multiple secondary...
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7532663 |
Digital correlators
The invention generally relates to improved correlators for spread spectrum receivers, particularly for third generation mobile communications systems. A Golay correlator with a plurality of delay...
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7526012 |
Interference reduction apparatus and method
A autocorrelation peak detector ( 54 ) and a interference-reducing timing generator ( 55 ) decide interference-reducing timings τ±(τ 2 −τ 1 ) for eliminating interference components that...
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7526010 |
Doped multi-rate spread spectrum composite code
A composite code is made for example by exclusive-OR'ing each real element of a first constituent code A with each element of a second constituent code B to obtain a basic composite code. To...
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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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7515876 |
Rake receiver with time-shared fingers
A rake receiver for processing a multi-path input signal received from a communications channel, wherein each multi-path component of the multi-path input signal comprises one or more symbols,...
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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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7508866 |
Acquisition matched filter for W-CDMA systems providing frequency offset robustness
A system and method for acquiring a transmitted spread-spectrum signal uses a matched filter configuration that is preferably employed as a Stage 2 filter in the second phase of an initial signal...
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7508865 |
System and method for tracking an ultrawide bandwidth signal
A system and method for fast synchronization of an incoming signal with a UWB receiver. The present invention synchronizes a UWB receiver with an incoming signal. The present invention correlates a...
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7505511 |
Matched filter and spread spectrum receiver
A matched filter for implementing the correlation of an input signal and a reference signal. The matched filter comprises N parallel M-sample long shift registers for receiving an equal number of...
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7499473 |
Method and device for synchronizing a mobile radio receiver
A method for synchronization of a mobile radio receiver having a time slot structure for a radio signal is disclosed. A data stream received by the mobile radio receiver is filtered in a filter,...
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7492810 |
Method and apparatus for segmented code correlation
A method and an apparatus is disclosed for efficient cross correlation of a plurality of signal vectors. Incoming data is partitioned into several segments and processed according to an algorithm...
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7489723 |
System and method for adjusting acquisition phase
A method ( 800 ) is provided of processing a wireless signal ( 105 ) at a receiving device ( 125 ). The method includes: receiving the wireless signal at the receiving device; performing an...
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7486642 |
Apparatus and method for receiving control message on packet data control channel in a mobile communication system supporting packet data service
An apparatus and method for receiving a packet data control channel in a mobile communication system that transmits packet data and has the packet data control channel for transmitting control...
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7480279 |
Apparatus and method for transmitting a control message on a packet data control channel in a mobile communication system supporting a packet data service
An apparatus and method for transmitting Walsh information over a packet data control channel in a base station of a mobile communication system that transmits packet data and has the packet data...
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7471719 |
Correlator
The present invention relates to a device for generating at least one code phase (Ce, Cp, Ci) the device comprising a shift register ( 702 ) comprising N outputs and to which a code sequence (Cin)...
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7466752 |
Determination of the position of a pulse peak
The invention relates to a method for determining the position x p of a peak of a pulse in a signal received at a receiver. In order to improve the accuracy of this determination, the method...
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7447254 |
Self-correlating pseudo-noise pairing
A method of transmitting communications codes is used in spread spectrum communications systems. The method includes transmitting a first pseudo-noise code, and transmitting a second pseudo-noise...
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7447259 |
System for direct acquisition of received signals
Signal processing architectures for direct acquisition of spread spectrum signals using long codes. Techniques are described for achieving a high of parallelism, employing code matched filter banks...
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7443942 |
Receiving device and receiving method
A receiver for CDMA enables a reduction in a circuit scale including a matched filter and lessening of loads stemming from despread processing. A speed conversion section 10 down-samples a received...
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7440490 |
Method and apparatus for multi-user detection using RSFQ successive interference cancellation in CDMA wireless systems
A method and apparatus for using a multi-user detector for reducing multiple access interference (MAI) in a direct sequence CDMA wireless system such as W-CDMA. A superconducting rapid single flux...
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7433430 |
Wireless communications device providing enhanced block equalization and related methods
A wireless communications device may include a wireless receiver receiving signals having alternating known and unknown symbol portions over a channel, and a demodulator systolic array. The...
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7433392 |
Wireless communications device performing block equalization based upon prior, current and/or future autocorrelation matrix estimates and related methods
A wireless communications device may include a wireless receiver for receiving signals comprising alternating known and unknown symbol portions, and a demodulator connected thereto. The demodulator...
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7430233 |
Spread-spectrum demodulator
A spread-spectrum demodulator includes a spreading code generating section, correlation value computing section, data signal demodulating section, peak signal detecting section, and spreading code...
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7426234 |
Synchronization signal detector and method
A synchronization (sync) signal detector and associated method detect the occurrence of a known sync signal in a received signal. The known sync signal is generated and correlated with the received...
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7424047 |
Receiver based method for de-spreading of spread spectrum signal
A spread spectrum receiver whose de-spreading process based on transformed spreading codes is provided. Instead of de-spreading with original spreading codes, this approach de-spreads received...
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