E. De Carvalho et Dtm. Slock, Burst mode equalization: optimal approach and suboptimal continuous-processing approximation, SIGNAL PROC, 80(10), 2000, pp. 1999-2015
We consider a transmission by burst where the data are organized and sent b
y bursts. At each end of the burst of data, a sequence of symbols is assume
d known, and the channel considered as constant over the burst duration. Th
e optimal structure of the burst mode equalizers is derived. The class of l
inear and decision feedback equalizers is considered, as well the class of
ISI cancelers that use past but also future decisions: for each class of eq
ualizers the MMSE, the unbiased MMSE and the MMSE zero forcing versions are
derived. Unlike in the continuous-processing mode, the optimal burst mode
filters are time varying. The performance of the different equalizers are e
valuated and compared to each other in terms of SNR and probability of erro
r: these measures depend on the position of the estimated symbol and on the
presence of known symbols. Finally, we show that, by choosing correctly th
e number and position of the known symbols, (time-invariant) continuous-pro
cessing filters applied to burst mode can be organized to give sufficiently
good performance, so that optimal (time-varying) burst processing implemen
tation can be avoided. (C) 2000 Elsevier Science B.V. All rights reserved.