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Training-Symbol Embedded, High-Rate Complex Orthogonal Designs for Relay Networks

Harshan, J and Sundar B, Rajan and Hjorungnes, Are (2010) Training-Symbol Embedded, High-Rate Complex Orthogonal Designs for Relay Networks. In: 2010 IEEE International Symposium on Information Theory, JUL 13, 2010, Austin, TX, pp. 2233-2237.

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Distributed Space-Time Block Codes (DSTBCs) from Complex Orthogonal Designs (CODs) (both square and non-square CODs other than the Alamouti design) are known to lose their single-symbol ML decodable (SSD) property when used in two-hop wireless relay networks using the amplify and forward protocol. For such a network, a new class of high rate, training-symbol embedded (TSE) SSD DSTBCs are proposed from TSE-CODs. The constructed codes include the training symbols within the structure of the code which is shown to be the key point to obtain high rate along with the SSD property. TSE-CODs are shown to offer full-diversity for arbitrary complex constellations. Non-square TSE-CODs are shown to provide better rates (in symbols per channel use) compared to the known SSD DSTBCs for relay networks when the number of relays is less than 10. Importantly, the proposed DSTBCs do not contain zeros in their codewords and as a result, antennas of the relay nodes do not undergo a sequence of switch on and off transitions within every codeword use. Hence, the proposed DSTBCs eliminate the antenna switching problem.

Item Type: Conference Paper
Series.: IEEE International Symposium on Information Theory
Publisher: IEEE
Additional Information: Copyright 2011 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.
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 06 Apr 2011 12:52
Last Modified: 06 Apr 2011 12:52
URI: http://eprints.iisc.ac.in/id/eprint/36380

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