Diversity reception system

Details Diversity reception system Diversity reception system

1980-03-17

1981-10-06

Ng, Jin F.

Telecommunications

Receiver or analog modulated signal frequency converter

With wave collector

455278, H04B 116, H04B 708

Patent

active

042939550

ABSTRACT:
To reduce fading in a diversity receiver, the signals received on two spaced-apart antennas are added together without phase shift while amplitude of the sum is above a certain threshold. When the signal falls below the threshold, the signal from a squelch detector causes the sum amplitude to be stored and then a 180.degree. time delay to be inserted between one of the antennas and the adding circuit, after which time, the new sum amplitude is compared with the stored signal amplitude. If the new signal has increased or remained the same, the 180.degree. phase shift remains in place but, if it has deteriorated, it is removed and the circuit reset.

REFERENCES:
patent: 2786133 (1957-03-01), Dyke
patent: 2854568 (1958-09-01), Lewin et al.
patent: 4160952 (1979-07-01), Seastrand, Jr.

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