Decision-feedback differential detection for 16DAPSK transmitted over Rician fading channels

TitleDecision-feedback differential detection for 16DAPSK transmitted over Rician fading channels
Publication TypeConference Paper
Year of Publication1999
AuthorsGerstacker, W. H., R. Schober, and J. B. Huber
Conference NameVehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th
Pagination2515 -2519 vol.5
Keywords16-DAPSK, 16-level differentially encoded amplitude-phase-shift keying, additive white Gaussian noise, amplitude shift keying, AWGN, AWGN channels, channel coding, decision feedback equalisers, decision-feedback differential detection, differential detection, linear predictive coding, linear predictor coefficients, mobile radio, nonstationary mobile channel, performance gain, phase shift keying, Rician channels, Rician fading channels, statistics tracking

In this paper, a novel decision-feedback differential detection (DF-DD) scheme based on linear prediction is proposed for 16-level differentially encoded amplitude-phase-shift keying (16-DAPSK). Unlike previously proposed DF-DD schemes, this scheme not only provides a performance gain over conventional differential detection (DD) under additive white Gaussian noise (AWGN) conditions but also under general Rician fading conditions. A further important advantage of the novel scheme is that it does not degrade under frequency offset. The linear predictor coefficients may be updated using the recursive least-squares (RLS) algorithm, which can start blind, i.e., without a priori knowledge about the channel statistics and without a training sequence. This makes the scheme attractive for application in mobile communications since the statistics of the nonstationary mobile channel can be tracked


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