Demodulating system for MSK and GMSK signal using a fast fourier

Details Demodulating system for MSK and GMSK signal using a fast fourier Demodulating system for MSK and GMSK signal using a fast fourier

1995-06-22

1999-02-02

Grimm, Siegried H.

Demodulators

Frequency shift keying or minimum shift keying demodulator

Input signal combined with local oscillator or carrier...

375326, 375336, H04L 2714

Patent

active

058670599

ABSTRACT:
A demodulating system for estimating frequency offset and sampling time error by a Fast Fourier Transform operation, which receives a modulated signal sent from a GMSK (Gaussian Low-Pass Filtered Minimum Shift Keying) or a MSK (Minimum Shift Keying) transmitter and demodulates the signal. The demodulating system uses a Fast Fourier Transform converter to obtain frequency offset and sampling time error by applying to it an initial demodulated result generated from a discriminator or a phase differentiator.

REFERENCES:
patent: 4518922 (1985-05-01), Luecke
patent: 5309480 (1994-05-01), Powell, II et al.

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