System and method for diversity reception of signals

Details System and method for diversity reception of signals System and method for diversity reception of signals

1986-06-03

1988-05-03

Masinick, Michael A.

Telecommunications

Receiver or analog modulated signal frequency converter

Plural receivers

455134, 455137, 455136, 455140, H04B 116

Patent

active

047425636

ABSTRACT:
A diversity reception of signals involves first and second mobile receivers which recover first and second baseband signals. The first and second receivers have first and second wave detectors, respectively, for generating output voltages corresponding to the strength of an FM modulated signal. When the difference in output voltages between the first and second detectors exceeds a predetermined value, a comparator gives an output detection signal. An adder circuit combines the first and second recovered baseband signals. First and second switching circuits selectively cut off the lower level one of the first or second recovered signal, which is then being supplied to the adder circuit. A third switching circuit adjusts the gain of the adder circuit. When the comparator does not give an output detection signal, the first and second switching circuits feed both the first and second recovered baseband signals to the adder circuit. At the same time, the third switching circuit reduces the gain of the adder circuit by one-half.

REFERENCES:
patent: 4403343 (1983-09-01), Hamada
patent: 4450585 (1984-05-01), Bell
patent: 4578819 (1986-03-01), Shimizu
IEEE Transactions on Vehicular Technology, vol. VT-33, No. 3, Aug. 1984, pp. 134-143, Edited by keisuke Suwa et al.
Microwave Mobile Communications, pp. 309-321, edited by William C. Jakes, Jr.

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