Pulse or digital communications – Repeaters – Testing
Patent
1991-03-05
1994-11-29
Gregory, Bernarr E.
Pulse or digital communications
Repeaters
Testing
380 34, 342 16, 342372, 342380, 342383, 4552781, 455283, 455284, H04L 2730, G01S 316, G01S 328
Patent
active
053696638
ABSTRACT:
A spatial combiner for connection to a receiver used in conjunction with a lurality of direction-sensitive antennas for receiving a spread-spectrum communication signal in the presence of interference includes a steering network, a plurality of normalizers, and a plurality of combiners. The steering network combines N inputs from N antennas and produces outputs J.sub.1, J.sub.2, . . . , J.sub.M, with M being a multiple of K and K a positive integer such that each M output is a weighted sum of N inputs from the antennas. The normalizers receive and normalize the M outputs to unit energy and produce normalized outputs J .sub.1, J .sub.2, . . . , J .sub.M. The combiners receive normalized outputs and sum the first K outputs to produce output C.sub.1, sum the next K outputs to produce output C.sub.2, and continuing summing outputs in the same manner until summing the last K outputs occurs to produce output C.sub.M/K. The outputs C.sub.1 through C.sub.M/K of the combiners can thereafter be processed in parallel through at least synchronization processing to identify which one of the combiner outputs is providing synchronization.
REFERENCES:
patent: 4079379 (1978-03-01), Piesinger
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patent: 4575724 (1986-03-01), Wiener
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patent: 4734701 (1988-03-01), Grobert
patent: 5001723 (1991-03-01), Kerr
Fendelman Harvey
Gregory Bernarr E.
Keough Thomas Glenn
The United States of America as represented by the Secretary of
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