A sphere decoder with approximate QR decomposition for frequency-selective channels

Luis G. Barbero; Pei Xiao; T. Ratnarajah; Mathini Sellathurai; C. F. N. Cowan

doi:10.1109/ICC.2010.5502539

A sphere decoder with approximate QR decomposition for frequency-selective channels

Luis G. Barbero, Pei Xiao, T. Ratnarajah, Mathini Sellathurai, C. F. N. Cowan

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Citation (Scopus)

Abstract

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.

Original language	English
Title of host publication	2010 IEEE International Conference on Communications
Publisher	IEEE
ISBN (Electronic)	9781424464043
ISBN (Print)	9781424464029
DOIs	https://doi.org/10.1109/ICC.2010.5502539
Publication status	Published - 10 Jul 2010
Event	2010 IEEE International Conference on Communications - Cape Town, South Africa Duration: 23 May 2010 → 27 May 2010

Publication series

Name	IEEE International Conference on Communications
ISSN (Print)	1550-3607
ISSN (Electronic)	1938-1883

Conference

Conference	2010 IEEE International Conference on Communications
Abbreviated title	ICC 2010
Country/Territory	South Africa
City	Cape Town
Period	23/05/10 → 27/05/10

Keywords

Approximate QR decomposition
Frequency-selective MIMO channel
Sphere decoder

ASJC Scopus subject areas

Computer Networks and Communications
Electrical and Electronic Engineering

Access to Document

10.1109/ICC.2010.5502539

Cite this

@inproceedings{69cf93a6b45549b7ac9c91de834b975b,

title = "A sphere decoder with approximate QR decomposition for frequency-selective channels",

abstract = "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.",

keywords = "Approximate QR decomposition, Frequency-selective MIMO channel, Sphere decoder",

author = "Barbero, {Luis G.} and Pei Xiao and T. Ratnarajah and Mathini Sellathurai and Cowan, {C. F. N.}",

year = "2010",

month = jul,

day = "10",

doi = "10.1109/ICC.2010.5502539",

language = "English",

isbn = "9781424464029",

series = "IEEE International Conference on Communications",

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booktitle = "2010 IEEE International Conference on Communications",

address = "United States",

note = "2010 IEEE International Conference on Communications, ICC 2010 ; Conference date: 23-05-2010 Through 27-05-2010",

}

Barbero, LG, Xiao, P, Ratnarajah, T, Sellathurai, M & Cowan, CFN 2010, A sphere decoder with approximate QR decomposition for frequency-selective channels. in 2010 IEEE International Conference on Communications., 5502539, IEEE International Conference on Communications, IEEE, 2010 IEEE International Conference on Communications, Cape Town, South Africa, 23/05/10. https://doi.org/10.1109/ICC.2010.5502539

TY - GEN

T1 - A sphere decoder with approximate QR decomposition for frequency-selective channels

AU - Barbero, Luis G.

AU - Xiao, Pei

AU - Ratnarajah, T.

AU - Sellathurai, Mathini

AU - Cowan, C. F. N.

PY - 2010/7/10

Y1 - 2010/7/10

N2 - 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.

AB - 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.

KW - Approximate QR decomposition

KW - Frequency-selective MIMO channel

KW - Sphere decoder

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U2 - 10.1109/ICC.2010.5502539

DO - 10.1109/ICC.2010.5502539

M3 - Conference contribution

AN - SCOPUS:77955411095

SN - 9781424464029

T3 - IEEE International Conference on Communications

BT - 2010 IEEE International Conference on Communications

PB - IEEE

T2 - 2010 IEEE International Conference on Communications

Y2 - 23 May 2010 through 27 May 2010

ER -

A sphere decoder with approximate QR decomposition for frequency-selective channels

Abstract

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Conference

Keywords

ASJC Scopus subject areas

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