Prediction-based decision-feedback differential detection for MDPSK

TitlePrediction-based decision-feedback differential detection for MDPSK
Publication TypeConference Paper
Year of Publication1999
AuthorsSchober, R., and W. H. Gerstacker
Conference NameGlobal Telecommunications Conference, 1999. GLOBECOM '99
Pagination2259 -2263 vol.4
Keywordschannel statistics, degradation, differential detection, differential phase shift keying, frequency offset, frequency-nonselective channels, land mobile radio, least squares approximations, M-ary differential phase-shift keying, MDPSK, mobile communications, prediction theory, prediction-based decision-feedback differential detection, prediction-based DF-DD, predictor coefficients, recursive least-squares algorithm, Ricean fading channels, Rician channels, RLS algorithm

In this paper, a decision-feedback differential detection (DF-DD) scheme for M-ary differential phase-shift keying (MDPSK) signals transmitted over Ricean fading channels is proposed. This scheme can improve conventional differential detection (DD) significantly for a multitude of frequency-nonselective channels. Moreover, prediction-based DF-DD is particularly well suited for application in mobile communications since the predictor coefficients may be updated regularly using the recursive least-squares (RLS) algorithm. Here, adaptation can start blind, i.e., no training sequence and no a priori knowledge about the channel statistics are required. A further important characteristic of the proposed detection scheme is that no degradation occurs under frequency offset


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