Differential Space-Time Modulation with Full Spatio-Spectral Diversity and Arbitrary Number of Transmit Antennas in ISI Channels

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Abstract

We present herein a differential space-time-frequency (DSTF) modulation scheme for systems with an arbitrary number of transmit antennas over frequency-selective fading channels. The proposed DSTF scheme employs a concatenation of a specially designed spectral encoder and a differential encoder/mapper that yield the maximum spatio-spectral diversity advantage and significant coding gain. To reduce the decoding complexity, the differential encoder is designed with a unitary structure that decouples the maximum likelihood (ML) detection in space and time; meanwhile, the spectral encoder utilizes a new linear constellation decimation (LCD) coding scheme that encodes across a minimally required subchannels and, as a result, has the least decoding complexity among all full-diversity codes. Numerical results show that the proposed DSTF scheme compares favorably with several existing differential space-time schemes for frequency-selective channels.

Original languageEnglish
Pages (from-to)37-40
Number of pages4
JournalICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Volume4
StatePublished - 2003
Event2003 IEEE International Conference on Accoustics, Speech, and Signal Processing - Hong Kong, Hong Kong
Duration: 6 Apr 200310 Apr 2003

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