Method for channel adaptive detecting/equalizing

Details Method for channel adaptive detecting/equalizing Method for channel adaptive detecting/equalizing

1992-12-03

1994-12-20

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

375102, H03H 730

Patent

active

053751434

ABSTRACT:
In a communications device, two coherent detection algorithms (102 and 103), one of which has a decision feedback equalizer (103), and a detector selection algorithm (104) are used to dynamically select a detector depending on whether delay spread distortion is present. First the correlation of the detector without the equalizer (102) is measured. If this correlation is greater than a predetermined threshold, the data from that detector (102) is used by the communications device. If the correlation is less than the threshold, the correlation of the detector with the equalizer (103) is measured. If this is less than the correlation of the detector without the equalizer (102), the data from the detector without the equalizer (102) is used, otherwise the data is taken from the equalizer (103). In any case, if the detector without the equalizer is used, the detector with the equalizer is turned off.

REFERENCES:
patent: 5212803 (1993-05-01), Uddenfeldt

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