Receiver with multiple antennas

Details Receiver with multiple antennas Receiver with multiple antennas

1992-08-26

1994-09-06

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Plural receivers

4551861, 4552761, H04B 106, H04B 702

Patent

active

053456025

ABSTRACT:
A VHF radio receiver intended for mobile use, e.g. in a car, features inputs from multiple antennas. Each antenna signal is mixed with a locally-generated oscillator signal; the resulting mixed signals are added, with controllable phase position, to form a summation signal. Alternate frequencies, as defined by the Radio Data System (RDS) international standard, are stored. At periodic time intervals, momentary switchover is made to alternate frequencies to measure their reception quality and to store this parameter. Whenever the originally-tuned frequency provides inadequate reception quality, a control circuit 19 switches over to the best of the alternate frequencies, so quickly that the changeover is almost imperceptible to the listener.

REFERENCES:
patent: 4939791 (1990-07-01), Bochmann et al.
Eur. Broadcasting Union, Specifications of the Radio Data System RDS for VHF/FM Sound Broadcasting, Tech. 3244-E, pp. 1-2 and 29-31, definitions 5 & 11 (Brussels, Mar. 1984).

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