Demodulator for digital FM signals

Details Demodulator for digital FM signals Demodulator for digital FM signals

1986-04-30

1988-04-05

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375103, 364724, 333 18, H04L 2714, H04B 110

Patent

active

047363924

ABSTRACT:
For compensation of the effects of multi-path reception, a cascade distortion corrector composed of distortion corrector blocks successively connected in series is provided for a digital FM demodulator that needs non-recursive filtering. Each distortion corrector block produces an increase of the phase rotation and of the propagation time as well as a reduction of the reflection factor of the input signal. The cascade distortion corrector leads to a significant reduction of the hardware expense compared to the previously used transversal type filter structures. Sufficient compensation of the multi-path reception effects can be obtained by connecting five or six distortion corrector blocks one after the other.

REFERENCES:
patent: 3803501 (1974-04-01), Jones, Jr.
patent: 3979701 (1976-09-01), Tomozawa
patent: 4184129 (1980-01-01), Danjon et al.
patent: 4506228 (1985-03-01), Kammeyer
patent: 4584600 (1986-04-01), Baker

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