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Class Information
Number: 375/140
Name: Pulse or digital communications > Spread spectrum > Direct sequence
Description: Subject matter including a form of modulation wherein a code sequence is used to directly modulate a carrier, usually by some form of phase-shift keying.

Sub-classes under this class:

Class Number Class Name Patents
375/141 End-to-end transmission system 759
375/147 Receiver 1,567
375/146 Transmitter 1,089

Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Patent Number Title Of Patent Date Issued
8711902 Synchronization processing circuit and synchronization processing method in wireless communication system Apr. 29, 2014
8705591 Global navigation receiver Apr. 22, 2014
8693521 Method and apparatus for packet acquisition Apr. 8, 2014
8693526 Unipolar spread spectrum modulation for low computation and power cost signal multiplexing with application to fNIRS measurments Apr. 8, 2014
8693602 Method and device for mono- and multi-antenna reception for Alamouti-type links Apr. 8, 2014
8686887 NFC transceiver with current converter Apr. 1, 2014
8675712 Zero delay reduced memory GPS PRN code interpolation Mar. 18, 2014
8665937 Load estimation in wireless communication Mar. 4, 2014
8665988 Device and method for realizing prefix code construction Mar. 4, 2014
8660165 System and method for detecting spread spectrum signals in a wireless environment Feb. 25, 2014
8654817 Combining signals with a shuffled-hadamard function Feb. 18, 2014
8654814 Embedded meta-carrier with spread spectrum for periodic-burst carriers via overlaid carriers Feb. 18, 2014
8649401 Generation and detection of synchronization signal in a wireless communication system Feb. 11, 2014
8644788 Signal receiver, portable computer and signal acquisition method used in satellite communication system Feb. 4, 2014
8638851 Joint bandwidth detection algorithm for real-time communication Jan. 28, 2014
8634504 Correlation calculating method, satellite signal capturing method, and correlation calculating circuit Jan. 21, 2014
8611397 Method and system for efficient DSSS FFT processing employing prime factor decomposition Dec. 17, 2013
8599902 Frequency selective modulating apparatus and method using re-spreading code Dec. 3, 2013
8594149 Method for the secure transmission of information using multiple LPD and LPI secondary carriers under a primary carrier with relative carrier offset Nov. 26, 2013
8582710 Recovery and synchronization for spread spectrum modulated clock Nov. 12, 2013
8576893 Systems and methods for high data rate ultra wideband communication Nov. 5, 2013
8571090 Technique for searching for a preamble signal in a spread spectrum using a fast hadamard transform Oct. 29, 2013
8565287 Method and system for per-cell interference estimation for interference suppression Oct. 22, 2013
8559480 Apparatus and method for generating scrambling codes in a radio communication system Oct. 15, 2013
8559482 Implementation of multi-channel intermediate frequency modem for radio communication with a programmable integrated circuit Oct. 15, 2013
8553808 Method and apparatus for detecting the presence of a signal in a frequency band using non-uniform sampling Oct. 8, 2013
8547882 Wireless communication apparatus, mobile wireless communications control method, and wireless station Oct. 1, 2013
8542834 System and method for securely pairing a wireless peripheral to a host Sep. 24, 2013
8542716 Continuous time chaos dithering Sep. 24, 2013
8542714 Method and system for reconstructing time of transmit from assisted or weak signal GPS observations Sep. 24, 2013
8537878 Spread-spectrum codes generation Sep. 17, 2013
8532160 Radio communication device and response signal spreading method Sep. 10, 2013
8532159 Transmitter, receiver, wireless communication system, and communication method Sep. 10, 2013
8514909 Noise and channel estimation using low spreading factors Aug. 20, 2013
8509283 Method for generating a reference signal sequence using grouping Aug. 13, 2013
8503511 Method and receiver apparatus for determining a correlation value considering frequency correction Aug. 6, 2013
8503594 Phase tracking in communications systems Aug. 6, 2013
8498321 Method and system for optimizing programmable interference suppression Jul. 30, 2013
8488649 Code converting apparatus, receiver, and code converting method Jul. 16, 2013
8488651 Encoding scheme for data transfer Jul. 16, 2013
8477750 Classification of wireless LAN signals Jul. 2, 2013
8477828 Adaptive correlation for detection of a high-frequency signal Jul. 2, 2013
8472505 Constant amplitude encoding apparatus and method for code division multiplexing communication system Jun. 25, 2013
8462831 System and method for use of sieving in GPS signal acquisition Jun. 11, 2013
8457178 Frequency offset estimator Jun. 4, 2013
8446931 Chip timing synchronization for link that transitions between clear and spread modes May. 21, 2013
8446932 Method for reconstructing the characteristics of transmitted CDMA waveforms May. 21, 2013
8442094 Cell search using rake searcher to perform scrambling code determination May. 14, 2013
8442132 Method and apparatus for allocating processing delays in multi-carrier systems May. 14, 2013
8437416 Coordinated cyclic shift and sequence hopping for Zadoff-Chu, modified Zadoff-Chu, and block-wise spreading sequences May. 7, 2013

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

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