Delayed decision feedback sequence estimator for determining opt

Details Delayed decision feedback sequence estimator for determining opt Delayed decision feedback sequence estimator for determining opt

1998-06-16

2000-10-17

Chin, Stephen

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

375354, H03D 100

Patent

active

061342807

ABSTRACT:
In a delayed decision feedback sequence estimating apparatus, a transmission channel characteristic is detected for a training signal. A timing detecting unit detects when there is obtained a maximum of ratios of a summation value of absolute values of amplitude components of the transmission channel characteristic for a maximum likelihood sequence estimation region to an addition of a value obtained by multiplying, by a predetermined value, a summation value of absolute values of amplitude components of the transmission channel characteristic for a decision feedback equalization region and a summation value of absolute values of amplitude components of the transmission channel characteristic for a region other than the maximum likelihood sequence estimation region and the decision feedback equalization region, as an out-of-estimation region, to generate a timing signal. A delayed decision feedback sequence estimating unit executes an estimation of an inputted reception signal with a transmission distortion based on the transmission channel characteristic and the timing signal to output a transmission signal.

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IEEE Transactions on Communications; Delayed Decision-Feedback Sequence Estimation, vol. 37, No. 5., May 1989 pp. 428-436.
NEC Research & Development; Delayed Decision Feedback Sequence Estimator for GMSK Wireless ATM Modem, vol. 38, No. 1, Jan. 1997, pp. 73-80.

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