Equalizing signal combiner

Details Equalizing signal combiner Equalizing signal combiner

1980-09-24

1982-10-12

Safourek, Benedict V.

Telecommunications

Receiver or analog modulated signal frequency converter

Plural receivers

455276, H04B 708

Patent

active

043542760

ABSTRACT:
In a space diversity receiver, the relative phase of the two received signals is varied in manner to minimize amplitude dispersion in the combined signal. A phase control signal is derived from the combined signal by phase modulating one of the received signals, and then detecting the fundamental amplitude component induced by said modulation within two selected portions of the combined signal spectrum. The fundamental component of the envelope modulation of the weaker of the two signal portions is used to control the relative phase of the two received signals so as to minimize the amplitude dispersion in the combined signal across the band. In the absence of inband phase dispersion needed in order for the compensating phase shift to effect the two signal portions differently, a relative delay is introduced in one of the two received signal paths.

REFERENCES:
patent: 2786133 (1957-03-01), Dyke
patent: 2951152 (1960-08-01), Sichak et al.
patent: 4160952 (1979-07-01), Seastrand, Jr.
patent: 4261056 (1981-04-01), Barnett et al.

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