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A Sphere Decoder with Approximate QR Decomposition for Frequency-Selective Channels

Barbero, L, Xiao, P, Ratnarajah, T and Sellathurai, M (2010) A Sphere Decoder with Approximate QR Decomposition for Frequency-Selective Channels In: IEEE International Conference on Communications, ICC'2010, 2010-05-23 - 2010-05-27.

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This paper presents a method to significantly reduce the preprocessing complexity of the sphere decoder (SD) in frequency-selective channels. The method consists of calculating an approximate QR decomposition (AQRD) of the channel matrix, making use of its special Toeptliz and block-Topelitz structure in single and multiple-antenna frequency-selective channels, respectively. The AQRD obtains the QR decomposition of a small submatrix of the channel matrix and extends that result to the rest of the matrix, resulting in a considerable complexity reduction compared to the original full QR decomposition (FQRD). Simulation results show that, despite the lower complexity of the AQRD, it causes only a small bit error rate (BER) performance degradation in the SD.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
Barbero, L
Xiao, P
Ratnarajah, T
Sellathurai, M
Date : 1 July 2010
DOI : 10.1109/ICC.2010.5502539
Contributors :
Additional Information : © 2010 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.
Depositing User : Symplectic Elements
Date Deposited : 18 Sep 2013 13:45
Last Modified : 31 Oct 2017 15:12

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