Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1999-06-21
2000-09-05
Chin, Stephen
Pulse or digital communications
Spread spectrum
Direct sequence
375148, 375267, 375346, 375347, 370487, 370488, 370490, 455 63, 455 673, 455135, 455138, H04B 1500
Patent
active
061154091
ABSTRACT:
An 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.
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Falcone Kenneth A.
Upadhyay Triveni N.
VanderVelde Wallace E.
Chin Stephen
Envoy Networks, Inc.
Ha Dac V.
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