Title :
Decision feedback differential detection for differential orthogonal space-time modulation with APSK signals over flat-fading channels
Author :
Song, Aijun ; Xia, Xiang-Gen
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Delaware, Newark, DE, USA
Abstract :
Differential orthogonal space-time modulation (DOSTM) with amplitude/phase shift keying (APSK) signals has been recently proposed to improve the data throughput of the DOSTM with PSK signals over quasi-static channels. In this letter, decision feedback differential detection (DF-DD) based on linear prediction is presented for the DOSTM with APSK Signals (DOSTM-APSK) over flat-fading channels. The proposed DF-DD offers better performance than the differential detection when the channel experiences fast fading. The coefficients of the linear prediction based DF-DD can be obtained by an adaptive recursive least-squares algorithm, where the channel statistics are not needed. The proposed DF-DD is also applicable to the general unitary differential space-time modulation.
Keywords :
amplitude shift keying; antenna arrays; differential detection; fading channels; least squares approximations; phase shift keying; recursive estimation; APSK signal; adaptive recursive least-squares algorithm; amplitude-phase shift keying; channel statistics; decision feedback differential detection; differential orthogonal space-time modulation; flat-fading channel; general unitary differential space-time modulation; linear prediction; quasi-static channel; Amplitude modulation; Bit error rate; Fading; Feedback; Phase modulation; Phase shift keying; Space time codes; Statistics; Throughput; Transmitting antennas;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2004.838412
