Systematic Construction of Linear Transform Based Full-Diversity, Rate-One Space-Time Frequency Codes

Shankar, MR Bhavani and Hari, KVS (2009) Systematic Construction of Linear Transform Based Full-Diversity, Rate-One Space-Time Frequency Codes. In: IEEE Transactions on signal processing, 57 (6). pp. 2285-2298.

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Abstract

In this paper, we generalize the existing rate-one space frequency (SF) and space-time frequency (STF) code constructions. The objective of this exercise is to provide a systematic design of full-diversity STF codes with high coding gain. Under this generalization, STF codes are formulated as linear transformations of data. Conditions on these linear transforms are then derived so that the resulting STF codes achieve full diversity and high coding gain with a moderate decoding complexity. Many of these conditions involve channel parameters like delay profile (DP) and temporal correlation. When these quantities are not available at the transmitter, design of codes that exploit full diversity on channels with arbitrary DIP and temporal correlation is considered. Complete characterization of a class of such robust codes is provided and their bit error rate (BER) performance is evaluated. On the other hand, when channel DIP and temporal correlation are available at the transmitter, linear transforms are optimized to maximize the coding gain of full-diversity STF codes. BER performance of such optimized codes is shown to be better than those of existing codes.

Item Type:	Journal Article
Publication:	IEEE Transactions on signal processing
Publisher:	IEEE
Additional Information:	Copyright 2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords:	Channel delay profile; coding gain; diversity gain; multiple antennas; orthogonal-frequency-division multiplexing (OFDM); space-time frequency (STF) coding; temporal correlation
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	14 Dec 2009 06:32
Last Modified:	19 Sep 2010 05:34
URI:	http://eprints.iisc.ac.in/id/eprint/20841

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