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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:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7620005 |
Method and apparatus for code assignment in a spread spectrum wireless communication system |
Nov. 17, 2009 |
| 7616606 |
Mechanism for avoiding triggering silent radio squelch circuits |
Nov. 10, 2009 |
| 7609197 |
Method for measuring distance and position using spread spectrum signal, and an equipment using the method |
Oct. 27, 2009 |
| 7609751 |
Method and apparatus to initiate communications between an unknown node and an existing secure network |
Oct. 27, 2009 |
| 7609790 |
Joint signal demodulation in a low and high data rate channel environment |
Oct. 27, 2009 |
| 7602835 |
Multi-rate spread spectrum composite code |
Oct. 13, 2009 |
| 7596169 |
Method of geometric harmonic signal modulation |
Sep. 29, 2009 |
| 7596168 |
Diversity receiving apparatus, controlling method of the same, and computer-readable medium containing program therefor |
Sep. 29, 2009 |
| 7593449 |
Multicarrier sub-layer for direct sequence channel and multiple-access coding |
Sep. 22, 2009 |
| 7593695 |
RF transceiver incorporating dual-use PLL frequency synthesizer |
Sep. 22, 2009 |
| 7590165 |
Sub-system based window placement and size decision mechanism and method thereof |
Sep. 15, 2009 |
| 7590169 |
Multipath interference reduction on pilot estimation with legacy system interoperability |
Sep. 15, 2009 |
| 7586973 |
Apparatus and method for modulating data message by employing orthogonal variable spreading factor (OVSF) codes in mobile communication system |
Sep. 8, 2009 |
| 7586837 |
Acquisition of a gated pilot signal |
Sep. 8, 2009 |
| 7586974 |
Method and apparatus for rake finger allocation in a DS-CDMA receiver |
Sep. 8, 2009 |
| 7583638 |
Device and method for processing a digital data signal in a CDMA radio transmitter |
Sep. 1, 2009 |
| 7583639 |
System and method for determining data rate |
Sep. 1, 2009 |
| 7580400 |
Apparatus and method for generating preamble signal for cell identification in an orthogonal frequency division multiplexing system |
Aug. 25, 2009 |
| 7577086 |
Method of generating a public long code mask |
Aug. 18, 2009 |
| 7573854 |
Method and apparatus for providing uplink packet data service in asynchronous WCDMA system |
Aug. 11, 2009 |
| 7555034 |
Apparatus and method for detecting timing error based on cyclic correlation |
Jun. 30, 2009 |
| 7551898 |
Channel quality feedback mechanism and method |
Jun. 23, 2009 |
| 7551664 |
Iterative and turbo-based method and apparatus for equalization of spread-spectrum downlink channels |
Jun. 23, 2009 |
| 7551663 |
Use of correlation combination to achieve channel detection |
Jun. 23, 2009 |
| 7541968 |
System and method for detecting an intruder using impulse radio technology |
Jun. 2, 2009 |
| 7542505 |
Systems and methods for signal conversion |
Jun. 2, 2009 |
| 7539125 |
Method and circuit for frequency offset estimation in frequency domain in the orthogonal frequency division multiplexing baseband receiver for IEEE 802.11A/G wireless LAN standard |
May. 26, 2009 |
| 7532564 |
Sub-banded ultra-wideband communications systems |
May. 12, 2009 |
| 7526010 |
Doped multi-rate spread spectrum composite code |
Apr. 28, 2009 |
| 7519098 |
Spread spectrum base station notch filtering transmitted signals |
Apr. 14, 2009 |
| 7519101 |
Method and apparatus for using empty time slots for spread spectrum encoding |
Apr. 14, 2009 |
| 7511637 |
Spreading code derived from weil sequences |
Mar. 31, 2009 |
| 7508860 |
Pulse signal generator for ultra-wideband radio transception and radio transceiver having the same |
Mar. 24, 2009 |
| 7502406 |
Automatic power control system for a code division multiple access (CDMA) communications system |
Mar. 10, 2009 |
| 7496128 |
Multi-user interference resilient ultra wideband (UWB) communication |
Feb. 24, 2009 |
| 7492810 |
Method and apparatus for segmented code correlation |
Feb. 17, 2009 |
| 7492808 |
Decoding method using adaptive step-size algorithm for a space-time coded DS-CDMA system |
Feb. 17, 2009 |
| 7489722 |
Apparatus for production of scrambling codes and preambles |
Feb. 10, 2009 |
| 7477634 |
Method and apparatus for a chip-level no-decision feedback equalizer for CDMA wireless systems |
Jan. 13, 2009 |
| 7471714 |
Random number sequence sharing system, random number sequence sharing apparatus, codec system, coding apparatus, decoding apparatus, random number sequence sharing method, coding method, decod |
Dec. 30, 2008 |
| 7471716 |
Spread spectrum system communication unit and its method for establishing high speed synchronization |
Dec. 30, 2008 |
| 7471717 |
Apparatus and method for acquiring spread-spectrum signals |
Dec. 30, 2008 |
| 7468990 |
Extension mode for wireless LANs complying with short interframe space requirement |
Dec. 23, 2008 |
| 7468989 |
Extension mode for wireless LANs compying with short interframe space requirement |
Dec. 23, 2008 |
| 7460506 |
Apparatus and method for transmitting and receiving a cell identification code in a mobile communication system |
Dec. 2, 2008 |
| 7443906 |
Apparatus and method for modulating data message by employing orthogonal variable spreading factor (OVSF) codes in mobile communication system |
Oct. 28, 2008 |
| 7443907 |
Base station apparatus of mobile communication system |
Oct. 28, 2008 |
| 7440485 |
Apparatus and method for communicating packet data control channel in a mobile communication system |
Oct. 21, 2008 |
| 7440492 |
Interference canceller for CDMA mobile stations |
Oct. 21, 2008 |
| 7429904 |
Spread-spectrum radio utilizing MEMS components |
Sep. 30, 2008 |
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