Diversity radio receiver automatic frequency control

Details Diversity radio receiver automatic frequency control Diversity radio receiver automatic frequency control

1991-10-09

1994-06-14

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Plural receivers

455273, 4552761, 375 40, 375100, H04B 1902, H04B 708

Patent

active

053218507

ABSTRACT:
A radio-frequency receiver employing antenna diversity is provided with a plurality of antennas and a local oscillator. Individual error signals are derived from each of respective ones of signals received from the plurality of antennas. The error signals are thereafter combined in such a way as to arrive at a combined error signal having greater reliability than any one of the individual error signals taken alone. Finally, an automatic frequency control circuit is controlled using the combined error signal. Since the effect of fading on the input signal to the automatic frequency control circuit is reduced, performance of the automatic frequency control circuit is increased and the quality of radio reception is improved.

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patent: 4888817 (1989-12-01), Ryu et al.
patent: 4939791 (1990-07-01), Bochmann et al.
patent: 4965858 (1990-10-01), Naito et al.

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