Process for the coherent demodulation of a reception signal

Details Process for the coherent demodulation of a reception signal Process for the coherent demodulation of a reception signal

1997-02-21

1999-07-20

Chin, Stephen

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

375340, 375233, 375232, 375231, 375230, 375229, H03D 100, H04L 2706, H03H 730, H03H 740

Patent

active

059265116

ABSTRACT:
In a process for the coherent demodulation of a reception signal, several coefficients of the channel impulse response are determined beforehand. The coefficients are divided into at least two gain taps and at least one loss tap. The loss taps are utilized for a feedback filter to eliminate a corresponding signal component. The signal cleared up in this manner is estimated in a log-likelihood equalizer on the basis of gain taps. The process is characterized in that neither filter training nor high mathematical effort are required for determining the equalizer coefficients. There is also no error floor for the high frequency band signal. The quantity of operations required per symbol in the detection phase is comparatively small.

REFERENCES:
patent: 5353307 (1994-10-01), Lester et al.
patent: 5471501 (1995-11-01), Parr et al.
patent: 5513215 (1996-04-01), Marchetto et al.
patent: 5621769 (1997-04-01), Wan et al.
patent: 5673288 (1997-09-01), Okanoue
patent: 5748415 (1998-05-01), Chevillat et al.

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