Diversity reception radio receiver

Details Diversity reception radio receiver Diversity reception radio receiver

1986-07-16

1988-07-05

Masinick, Michael A.

Telecommunications

Receiver or analog modulated signal frequency converter

Plural receivers

455132, 455133, 455136, 455177, H04B 708

Patent

active

047560231

ABSTRACT:
A diversity reception radio receiver has a two-receiver system incorporating first and second receivers. A wave envelope detector is provided for each receiver to generate an output voltage corresponding to the strength of the electromagnetic signal wave which is picked up by the receiver. A hysteresis comparator compares the outputs of the two wave envelope detectors and generates a switching control signal. A switching device responds to the switching control signal by selecting between the signals which are repoduced by the first and second receivers. Because the amount of hysteresis in the comparator is automatically adjusted in accord with the strength of the signal wave, there is a minimum of hunting between the outputs of the two receivers.

REFERENCES:
patent: 4035728 (1977-07-01), Ishikawa et al.
patent: 4450585 (1984-05-01), Bell
patent: 4578819 (1986-03-01), Shimizer
K. Suwa et al., Diversity Improvement of Voice Signal Transmission Using Postdetection Selection Combining in Land Mobile Radio, Aug. 1984, IEEE Transactions on Vehicular Technology, vol. VT-33, No. 3, pp. 134-143.
W. C. Jakes, Jr. et al., Fundamentals of Diversity Systems, Chpt. 5, pp. 309-321 of the book, Microwave Mobile Communications, W. C. Jakes, Jr. editor, John Wiley & Sons, Inc. (N.Y., 1974).

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