Telecommunications – Receiver or analog modulated signal frequency converter – With wave collector
Patent
1987-09-10
1989-07-18
Safourek, Benedict V.
Telecommunications
Receiver or analog modulated signal frequency converter
With wave collector
455137, 375100, 343712, H04B 708
Patent
active
048500372
ABSTRACT:
For diversity reception from a plurality of antennas, particularly in an automotive vehicle (FIG. 4), the respectively received signals are mixed with a local oscillator signal to form a plurality of IF signals (u.sub.1 . . . u.sub.n). The respective IF signals are weighted with a weighting coefficient which is derived from a sum circuit of all the IF signals, and the respective IF signal, which weighting circuit includes an integrator to minimize temporal variations in the amplitude of the sum signal. The sum signal forms the actual IF signal, for further processing, and demodulating to derive an audio signal. Preferably, the signals from the antennas are branched, and the branch signals phase-shifted 90.degree., which, again, are weighted by similarly generated weighting coefficients, and the weighted, phase-shifted signals are combined in the adding or summing circuit (70) to form said eventual IF signal for demodulation.
REFERENCES:
patent: 4027247 (1977-05-01), Aranguien
patent: 4347627 (1982-08-01), Alter
patent: 4349914 (1982-09-01), Evans
patent: 4397036 (1983-08-01), Hirade et al.
patent: 4715048 (1987-12-01), Masamuia
Blaupunkt Werke GmbH
Kuntz Curtis
Safourek Benedict V.
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