Integrated adaptive spatial-temporal system for controlling narrowband and wideband sources of interferences in spread spectrum CDMA receivers
June 21, 2019. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPhased array signal processing Method and apparatus for multiplexing communications signals through blind adaptive spatial filtering Digital adaptive transversal filter for spread spectrum receivers Interference suppressor for a radio receiver Adaptive spatial-temporal postprocessing for low bit-rate coded image sequences Transceiver algorithms of antenna arrays Standalone canceller of narrow band interference for spread spectrum receivers Direct sequence spread spectrum receiver and antenna array for the simultaneous formation of a beam on a signal source and a null on an interfering jammer Interference cancellation system for global positioning satellite receivers GPS transfer initialization system InventorsAssigneeApplicationNo. 336787 filed on 06/21/1999US Classes:375/144, Having multi-receiver or interference cancellation370/487, Combined communication of diverse information types370/488, Connecting filters370/490, Combined communication of diverse information types375/148, Multi-receiver or interference cancellation375/267, Diversity375/346, Interference or noise reduction375/347, Diversity (frequency or time)455/63.1, Distortion, noise, or other interference prevention, reduction, or compensation455/63.4, Directional antenna455/135, By signal quality (e.g., signal to noise ratio)455/138With control (e.g., automatic gain control)ExaminersPrimary: Chin, StephenAssistant: Ha, Dac V. Attorney, Agent or FirmInternational ClassH04B 015/00AbstractAn integrated adaptive spatial-temporal system and method for controlling narrowband and wideband sources of interference. The system includes an N element antenna array which receives a spread spectrum signal and interference signals, each element receiving a different phase shifted version of the spread spectrum and interference signals; a spatial filter including an antenna pattern former responsive to the antenna array which combines the phase shifted spread spectrum and interference signals according to controlling weights to null N-1 of the interference signal; an adaptive narrow band, e.g., temporal filter, responsive to the spatial filter for filtering any remaining narrowband interference signals from the combined signal; and feedback subsystem responsive to the narrow band filter for adjusting the controlling weights of the antenna pattern former until the operation of the spatial filter is optimized and nulls wideband interference signals before narrowband interference signals.Other References
Field of SearchDiversityAntinoise or distortion Diversity (frequency or time) Plural signal paths in receiver By filtering (e.g., digital) Plural receivers With output combining With control (e.g., automatic gain control) Frequency or phase control With particular output combining With phase shifting, correcting, or regulating in the output path of one or more collectors Mixing each antenna channel signal Sum of each antenna signal COMMUNICATION TECHNIQUES FOR INFORMATION CARRIED IN PLURAL CHANNELS Connecting filters Combined communication of diverse information types Combined communication of diverse information types Combining or distributing information via frequency channels Multiple frequency translations | |
