Adaptive maximum likelihood sequence estimation apparatus and ad

Details Adaptive maximum likelihood sequence estimation apparatus and ad Adaptive maximum likelihood sequence estimation apparatus and ad

1995-11-14

1996-11-26

Tse, Young T.

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

375232, 375346, H01L 2706

Patent

active

055793444

ABSTRACT:
An adaptive maximum likelihood sequence estimation apparatus includes a first estimation unit for estimating a transmission signal sequence from received signals on the basis of an estimated transmission path impulse response. A second estimation unit estimates an estimated received signal at time k on the basis of a known signal sequence or the transmission signal sequence estimated by the first estimation unit, and a transmission path impulse response estimated at time k-1. An error signal generation unit generates an error signal on the basis of a received signal at time k and the estimated received signal at time k. A third estimation unit estimates a transmission path impulse response at time k using a predetermined adaptive algorithm on the basis of the error signal. Furthermore, the third estimation unit estimates a transmission path impulse response by a non-recursive calculation during the reception period of a known signal sequence of the received signal, and estimates a transmission path impulse response by a recursive calculation during the reception period of an unknown data signal sequence of the received signals following the known signal sequence period.

REFERENCES:
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patent: 5204878 (1993-04-01), Langson
patent: 5272726 (1993-12-01), Furuya et al.
patent: 5272727 (1993-12-01), Okanoue
patent: 5297169 (1994-03-01), Backstrom et al.
patent: 5303263 (1994-04-01), Shoji
patent: 5353307 (1994-10-01), Lester et al.

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