Demodulation apparatus having multipath detector for selecting a

Details Demodulation apparatus having multipath detector for selecting a Demodulation apparatus having multipath detector for selecting a

1992-06-29

1993-05-25

Grimm, Siegfried H.

Demodulators

Frequency modulation demodulator

Plural demodulation

329318, 329327, 375 14, 375102, 455303, 455312, H03D 300, H04B 112

Patent

active

052143910

ABSTRACT:
A demodulation apparatus incorporating an adaptive equalizer, capable of realizing a highly reliable communication, lower power consumption, and a compact size. In the demodulation apparatus, an output of one of two demodulators, at least one of which including an equalizer, is selected according to a presence or absence of multipath which is determined from a non-coincidence of bit codes, eye apertures, bit error rates, or a matched filter output, while the operation of the other demodulator is stopped for reduction of power consumption, by stopping a supply of power or clock signals to the other demodulator. In a case using a frequency offset detection unit and a frequency offset memory, one of these is selected according to a convergence or divergence of an error signal from an equalizer, while the operation of the other one is stopped for reduction of power consumption.

REFERENCES:
patent: 3537008 (1970-10-01), Lakatos
patent: 4151475 (1979-04-01), von der Neyen
patent: 4726073 (1988-02-01), Sessink

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