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Algebraic Distributed Differential Space-Time Codes with Low Decoding Complexity

Rajan, G Susinder and Rajan, B Sundar (2008) Algebraic Distributed Differential Space-Time Codes with Low Decoding Complexity. In: IEEE Transactions on Wireless Communications, 7 (10). pp. 3962-3971.

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Abstract

The differential encoding/decoding setup introduced by Kiran et al, Oggier-Hassibi and Jing-Jafarkhani for wireless relay networks that use codebooks consisting of unitary matrices is extended to allow codebooks consisting of scaled unitary matrices. For such codebooks to be usable in the Jing-Hassibi protocol for cooperative diversity, the conditions involving the relay matrices and the codebook that need to be satisfied are identified. Using the algebraic framework of extended Clifford algebras, a new class of Distributed Differential Space-Time Codes satisfying these conditions for power of two number of relays and also achieving full cooperative diversity with a low complexity sub-optimal receiver is proposed. Simulation results indicate that the proposed codes outperform both the cyclic codes as well as the circulant codes. Furthermore, these codes can also be applied as Differential Space-Time codes for noncoherent communication in classical point to point multiple antenna systems.

Item Type: Journal Article
Additional Information: Copyright 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: Algebra;cooperative diversity;low decoding complexity; space-time coding.
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 01 May 2009 03:03
Last Modified: 19 Sep 2010 04:57
URI: http://eprints.iisc.ernet.in/id/eprint/17545

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