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A family of fast-decodable MIDO codes from crossed-product algebras over Q

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A family of fast-decodable MIDO codes from crossed-product algebras over Q

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Title: A family of fast-decodable MIDO codes from crossed-product algebras over Q
Author: Luzzi, Laura; Oggier, Frederique
Copyright year: 2011
Abstract: Multiple Input Double Output (MIDO) asymmetric space-time codes for 4 transmit antennas and 2 receive antennas can be employed in the downlink from base stations to portable devices. Previous MIDO code constructions with low Maximum Likelihood (ML) decoding complexity, full diversity and the non-vanishing determinant (NVD) property are mostly based on cyclic division algebras. In this paper, a new family of MIDO codes with the NVD property based on crossed-product algebras over Q is introduced. Fast decodability follows naturally from the structure of the codewords which consist of four generalized Alamouti blocks. The associated ML complexity order is the lowest known for full-rate MIDO codes (O(M^{10}) instead of O(M^{16}) with respect to the real constellation size M). Numerical simulations show that these codes have a performance from comparable up to 1dB gain compared to the best known MIDO code with the same complexity.
Subject: DRNTU::Engineering::Electrical and electronic engineering::Wireless communication systems.
Type: Conference Paper
Conference name: IEEE International Symposium on Information Theory (2010 : Austin, Texas, US)
School: School of Physical and Mathematical Sciences
Rights: © 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: http://dx.doi.org/10.1109/ISIT.2010.5513709.
Version: Accepted version

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