Title :
Decision feedback differential detection for differential orthogonal space-time modulation with APSK signals over frequency-non-selective fading channels
Author :
Song, Aijun ; Xia, Xiang-Gen
Author_Institution :
Dept. of Electr. & Comput. Eng., Delaware Univ., Newark, DE, USA
Abstract :
Differential orthogonal space-time modulation (DOSTM) with amplitude/phase shift keying (APSK) signals has been proposed to improve the throughput of the DOSTM with phase shift keying (PSK) signals over quasi-static channels. In this paper, decision feedback differential detection (DF-DD) based on linear prediction is presented for the DOSTM with APSK signals (DOSTM-APSK) over frequency-non-selective fading channels. The proposed DF-DD offers better performance than the DD when the channel experiences fast fading. The coefficients of the linear prediction based DF-DD can be obtained by an adaptive RLS algorithm, where the channel statistics is not needed. The proposed DF-DD is also applicable to the general unitary differential space-time modulation (DSTM).
Keywords :
automatic repeat request; differential detection; fading channels; feedback; least squares approximations; phase shift keying; prediction theory; recursive estimation; APSK signals; adaptive RLS algorithm; amplitude/phase shift keying; decision feedback differential detection; differential orthogonal space-time modulation; frequency-nonselective fading channels; linear prediction; quasistatic channels; Amplitude modulation; Fading; Feedback; Frequency; Phase modulation; Phase shift keying; Receiving antennas; Statistics; Throughput; Transmitting antennas;
Conference_Titel :
Communications, 2003. ICC '03. IEEE International Conference on
Print_ISBN :
0-7803-7802-4
DOI :
10.1109/ICC.2003.1204583
