R. Schober et al., Decision-feedback differential detection based on linear prediction for 16DAPSK signals transmitted over flat Ricean fading channels, IEEE COMMUN, 49(8), 2001, pp. 1339-1342
In this letter, prediction-based decision-feedback differential detection (
DF-DD) for 16-level differentially encoded amplitude/phase-shift keying is
proposed. Unlike previously reported DF-DD schemes, this scheme provides a
performance gain over conventional differential detection under general Ric
ean fading conditions. A further important advantage of the novel scheme is
that it is able to compensate a small carrier frequency offset. The linear
predictor coefficients may be updated using the recursive least-squares al
gorithm, which can start blind, i.e., without a priori knowledge about the
channel statistics and without a training sequence. This makes the scheme a
ttractive for application in mobile communications since the statistics of
a nonstationary mobile channel can be tracked.