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Browse by Category: Main > Communications
Class Information
Number: 375/142
Name: Pulse or digital communications > Spread spectrum > Direct sequence > End-to-end transmission system > Having correlation-type receiver
Description: Subject matter in which transmitted signals are recovered using a structure or method that compares a transmitted spreading code sequence with a local spreading code sequence, generally by multiplicative means.










Patents under this class:
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Patent Number Title Of Patent Date Issued
6700880 Selection mechanism for signal combining methods Mar. 2, 2004
6700919 Channel estimation for communication system using weighted estimates based on pilot data and information data Mar. 2, 2004
6697444 Recycling integrator correlator Feb. 24, 2004
6687507 Time of arrival estimation for edge/GSM Feb. 3, 2004
6683906 Radio communication apparatus Jan. 27, 2004
6683929 Mobile communication device having a good tracking precision and a wide following range of synchronization Jan. 27, 2004
6680987 Fading communications channel estimation and compensation Jan. 20, 2004
6678312 Method for extending digital receiver sensitivity using analog correlation Jan. 13, 2004
6674790 System and method employing concatenated spreading sequences to provide data modulated spread signals having increased data rates with extended multi-path delay spread Jan. 6, 2004
6671311 Receiver for use in a code shift keying spread spectrum communications system Dec. 30, 2003
6661831 OUTPUT APPARATUS, TRANSMITTER, RECEIVER, COMMUNICATIONS SYSTEM FOR OUTPUTTING, TRANSMITTING AND RECEIVING A PSEUDORANDOM NOISE SEQUENCE, AND METHODS FOR OUTPUTTING, TRANSMITTING RECEIVING PSEU Dec. 9, 2003
6654405 Methods and apparatus for use in performing dot product operations for spread spectrum communications Nov. 25, 2003
6650690 Device and system for carrying out search procedures in a mobile radio receiver Nov. 18, 2003
6650689 Correlator and delay lock loop circuit Nov. 18, 2003
6633601 Method and device for frame rate determination using correlation metrics and frame quality indicators Oct. 14, 2003
6628699 Receiving a spread spectrum signal Sep. 30, 2003
6625200 Multi-stage CDMA synchronization with parallel execution Sep. 23, 2003
6621850 Block detection receiver Sep. 16, 2003
6621854 Spread-spectrum electromagnetic signals Sep. 16, 2003
6621855 Scalable spread-spectrum signal detection and acquisition processor Sep. 16, 2003
6618430 Methods and apparatus for receiving N-chip resistant codes Sep. 9, 2003
6614835 Acquisition method and configuration for carrying out the method Sep. 2, 2003
6606349 Spread spectrum receiver performance improvement Aug. 12, 2003
6606346 Method and apparatus for computing signal correlation Aug. 12, 2003
6603980 Transmitter-receiver, and method for controlling transmission power of the same Aug. 5, 2003
6603803 Global positioning system receiver for monitoring the satellite transmissions and for reducing the effects of multipath error on coded signals and carrier phase measurements Aug. 5, 2003
6600775 Adaptive reference pattern for spread spectrum detection claims Jul. 29, 2003
6597726 Receiver including an apparatus for generating complex four-phase sequences Jul. 22, 2003
6594605 Correlation function measuring method and apparatus Jul. 15, 2003
6590872 Receiver with parallel correlator for acquisition of spread spectrum digital transmission Jul. 8, 2003
6590888 Cellar system, mobile portable apparatus, base station apparatus, optimum path detecting method, and apparatus thereof Jul. 8, 2003
6587500 Symbol sampling time settlement of a hard decision radio receiver Jul. 1, 2003
6584141 DS-CDMA system with high resolution timing Jun. 24, 2003
6584142 Matched filter Jun. 24, 2003
6577686 Receiver Jun. 10, 2003
6574205 CDMA cellular system and method of detecting spreading code in CDMA cellular system Jun. 3, 2003
6574268 Asymmetric orthogonal codes for optical communications Jun. 3, 2003
6574269 Asymmetric orthogonal codes for wireless system receivers with multiplication-free correlators Jun. 3, 2003
6570909 Interference suppression in a CDMA receiver May. 27, 2003
6563861 Doppler spread estimation system May. 13, 2003
6560271 Pseudo noise code acquisition apparatus for direct sequence spread spectrum communications May. 6, 2003
6553019 Communications system employing orthogonal frequency division multiplexing based spread sprectrum multiple access Apr. 22, 2003
6553056 CDMA receiver with a reduced number of required high speed adders Apr. 22, 2003
6549564 Random access in a mobile telecommunications system Apr. 15, 2003
6549559 Apparatus and method for locking onto a psuedo-noise code in an IS-95 spread spectrum communications system Apr. 15, 2003
6549565 Code division multiple access system and method of operation with improved signal acquisition and processing Apr. 15, 2003
6546064 Synchronization acquiring method synchronization acquiring apparatus Apr. 8, 2003
6546245 Inverted code sequence cordless signaling Apr. 8, 2003
6546258 Communication apparatus and communication method Apr. 8, 2003
6535545 RF modem utilizing saw resonator and correlator and communications transceiver constructed therefrom Mar. 18, 2003

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