Method and system for demodulating GMSK signals in a cellular di

Details Method and system for demodulating GMSK signals in a cellular di Method and system for demodulating GMSK signals in a cellular di

1994-01-27

1996-05-07

Pascal, Robert J.

Demodulators

Frequency shift keying or minimum shift keying demodulator

329303, 375336, 375343, 375262, 375274, 375341, H04L 2710, H04L 2714

Patent

active

055149987

ABSTRACT:
A decision feedback multiple symbol differential demodulator for Gaussian filtered Minimum Shift Keying (GMSK) has a performance very close to theoretical limit even under a fading channel. The demodulator implements a non-coherent, maximum likelihood (ML) search over multiple bit-time intervals. The past bit decisions are fed back to the ML decision logic. The improved performance of the demodulator is achieved by using old decisions in the ML decision logic.

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