Noncoherent Sequence Estimation: A Comparison

Authors:

Schober, R. ,  Lampe, L. H. J. ,  Enzner, G.

Book Title:

Proceedings of International Conference on Telecommunications (ICT)

Address:

Bucharest, Romania

Date:

Jun. 2001

Language:

English

Abstract

In this paper, three previously proposed non-coherent sequence estimation (NSE) schemes are compared for two important applications: convolutionally coded MPSK transmission over the AWGN channel and differential MPSK transmission over intersymbol interference (ISI) channels. We show that the influence of the rectangular observation window employed by all considered NSE schemes can be described by the same nonrecursive amplitude and phase reference symbols. In order to increase the computational efficiency, we propose an infinite but exponentially decaying observa-
tion window. In this case, the reference symbols can be generated in a recursive way. We investigate how the performance of the considered NSE schemes is influenced by the type of observation window used, the observation window size, and reduced–state decoding.

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