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High-rate, Double-Symbol-Decodable STBCs from Clifford Algebras

Karmakar, Sanjay and Rajan, Sundar B (2006) High-rate, Double-Symbol-Decodable STBCs from Clifford Algebras. In: IEEE Global Telecommunications Conference (GLOBECOM 06), NOV 27-DEC 01, 2006, San Francisco, CA.

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For the number of transmit antennas N = 2(a) the maximum rate (in complex symbols per channel use) of all the Quasi-Orthogonal Designs (QODs) reported in the literature is a/2(a)-1. In this paper, we report double-symbol-decodable Space-Time Block Codes with rate a-1/2(a)-2 for N = 2(a) transmit antennas. In particular, our code for 8 and 16 transmit antennas offer rates 1 and 3/4 respectively, the known QODs offer only 3/4 and 1/2 respectively. Our construction is based on the representations of Clifford algebras and applicable for any number of transmit antennas. We study the diversity sum and diversity product of our codes. We show that our diversity sum is larger than that of all known QODs and hence our codes perform better than the comparable QODs at low SNRs for identical spectral efficiency. We provide simulation results for various spectral efficiencies.

Item Type: Conference Paper
Series.: IEEE Global Telecommunications Conference (Globecom)
Publisher: IEEE
Additional Information: Copyright 2006 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: 20 Apr 2011 06:26
Last Modified: 20 Apr 2011 06:26
URI: http://eprints.iisc.ac.in/id/eprint/36750

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