Pulse or digital communications – Repeaters – Testing
Patent
1992-06-23
1993-11-09
Cain, David C.
Pulse or digital communications
Repeaters
Testing
H04K 100
Patent
active
052609685
ABSTRACT:
A method and apparatus for spatial multiplexing of spectrally overlapping communications signals which does not require use of a training signal, computationally intensive direction-finding methods, or antenna calibration is presented. An adaptive antenna array at a base station is used in conjunction with signal processing through self coherence restoral to separate the temporally and spectrally overlapping signals of users that arrive from different specific locations within the locale and to mitigate multipath fading and shadowing at the base station and, by reciprocity, to transmit directively to minimize interfering signals arriving at the mobile (or portable or stationary) units and to mitigate multipath fading and shadowing at the mobile units. The radiation pattern of transmitted signal is matched to the adapted reception pattern of the signal received at the base station.
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Gardner William A.
Schell Stephan V.
Cain David C.
O'Banion John P.
The Regents of the University of California
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