Digital demodulator for amplitude or angle modulation using trun

Details Digital demodulator for amplitude or angle modulation using trun Digital demodulator for amplitude or angle modulation using trun

1990-11-27

1992-06-09

Grimm, Siegfried H.

Demodulators

Frequency modulation demodulator

Plural demodulation

329341, 329345, 329347, 375 80, 455142, 455214, 455337, H03D 100, H03D 300

Patent

active

051210720

ABSTRACT:
A digital demodulator for demodulating baseband signals in a radio receiver. The demodulator includes a digital signal processing module for forming a mathematical series adapted for generating demodulation functions. The selection of coefficients for this series is controlled to provide specific demodulation functions as required for the demodulation of different kinds of signals such as amplitude modulated or angle modulated signals using one computational block or element. When demodulating amplitude modulated signals, the coefficients used in the mathematical series provide an approximation to the square root function. When demodulating phase or frequency modulated signals, the coefficients used provide an approximation to the arctangent function.

REFERENCES:
patent: 4794341 (1988-12-01), Barton et al.

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