Coherent blind demodulation

Details Coherent blind demodulation Coherent blind demodulation

1996-08-20

1999-02-16

Chin, Stephen

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

375341, 375340, 375316, 371 44, 371 45, 371 46, 371 381, 371 391, H03D 100, H04L 2706

Patent

active

058728163

ABSTRACT:
A system and method of blind channel estimation to receive a signal burst over a communications channel; divide the signal burst into a prescribed number of groups of symbols; hypothesize all possible transmitted data sequences or each group; generate a corresponding channel estimate for each possible data sequence; determine an error measurement for each corresponding channel estimate; select a number of the corresponding channel estimates for each group from amongst the corresponding channel estimates, the number of the corresponding channel estimates being selected for having smaller error measurements than remaining corresponding channel estimates not selected; identifying a best channel estimate for each group from amongst the number of the corresponding channel estimates having been selected for each group; and reviewing the best channel estimate having been identified for each group and reidentifying best channel estimates for some of the groups so as to increase smoothness of a curve in two-dimensional space made from the reidentified best channel estimates and the best channel estimates for remaining groups for which no reidentification is made.

REFERENCES:
patent: 5263033 (1993-11-01), Seshadri
patent: 5272726 (1993-12-01), Furuya et al.
patent: 5432821 (1995-07-01), Polydoros et al.
patent: 5450445 (1995-09-01), Ushirokawa

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