Space diversity reception system having compensation means of mu

Details Space diversity reception system having compensation means of mu Space diversity reception system having compensation means of mu

1980-01-21

1982-04-20

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Plural receivers

455273, 455275, 455276, 455278, H04B 708

Patent

active

043262945

ABSTRACT:
A space diversity reception system which minimizes the inband amplitude and/or phase dispersion by controlling the phase shifter is described. According to the present invention, the interference waves in the two antenna outputs are combined in anti-phase condition. The phase shifter control direction is decided by the sign of the two parameters. One of them is difference between two antenna levels at the center frequency of the pass-band, and the other is the difference of the combined signal levels at the extreme edges of the pass-band. The control means comprises four detectors for detecting said levels, two subtractors for providing said level difference between them, and the control circuit for deciding the phase shifter control direction.

REFERENCES:
patent: 1794418 (1931-03-01), Potter
patent: 2505266 (1950-04-01), Villem
patent: 2860238 (1958-11-01), Dyke et al.
patent: 3036301 (1962-05-01), Wiesner
patent: 4079318 (1978-03-01), Kinoshita
patent: 4232399 (1980-11-01), Heiter

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