Demodulator for radio data signals

Details Demodulator for radio data signals Demodulator for radio data signals

1994-05-16

1995-05-09

Grimm, Siegfried H.

Demodulators

Phase shift keying or quadrature amplitude demodulator

329310, 375324, 375333, H04L 2720

Patent

active

054143845

ABSTRACT:
In a demodulator for use in the Radio Data System (RDS) as defined by the European Broadcasting Union, transmission of these signals is carried out through phase shift modulation of a suppressed subcarrier, a multiplex signal, which contains a signal with the frequency of the subcarrier passes through a band-pass filter and an amplitude limiter, and the amplitude-limited signal, having a carrier frequency, is sampled at a sampling frequency that is a multiple of the frequency of the subcarrier. The sampling values are summed over a preset portion of one period of the subcarrier. The summed sampling values are supplied to a digital signal processing circuit.

REFERENCES:
patent: 3949401 (1976-04-01), Hegeler et al.
patent: 5175507 (1992-12-01), Roither
patent: 5278560 (1994-01-01), Hegeler et al.

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