| Abstract |
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Abstract: An iterative pilot symbol aided detector for random multi-path fading channels that does not neglect inter-symbol- interference (ISI) is studied for a CDMA up-link system with multiple receiver antennas. The algorithm resolves the received signals at each antenna into components corresponding to each path for every user. Estimated components are combined for obtaining the next sequence estimate for all users, and, thus, no signal energy is lost. Sequence estimation is based on convex set maximization of the likelihood function termed the generalized decorrelator approach. The continuous log-likelihood maximization technique used here is the expectation-maximization approach to parameter estimation for superimposed signals introduced by Feder and Weinstein. Its resulting solution embodies an iterative non-quantized signal path estimator and an MMSE channel estimator.
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 Additional Information
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Citation:
P. Spasojevic,
"Generalized Decorrelators for Fading Channels,"
itcc,
p. 0312,
International Conference on Information Technology: Coding and Computing (ITCC '01),
2001
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