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

School of Engineering

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

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	IEEE International Conference on Communications
DOIs	https://doi.org/10.1109/ICC.2010.5502539
Publication status	Published - 13 Aug 2010
Event	2010 IEEE International Conference on Communications, ICC 2010 - Cape Town, United Kingdom Duration: 23 May 2010 → 27 May 2010

Conference

Conference	2010 IEEE International Conference on Communications, ICC 2010
Country/Territory	United Kingdom
City	Cape Town
Period	23/05/10 → 27/05/10

Keywords / Materials (for Non-textual outputs)

Approximate QR decomposition
Frequency-selective MIMO channel
Sphere decoder

Access to Document

10.1109/ICC.2010.5502539

Cite this

@inproceedings{b405eb409b2643409fbf6c044d6b5273,

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 = aug,

day = "13",

doi = "10.1109/ICC.2010.5502539",

language = "English",

isbn = "9781424464043",

booktitle = "IEEE International Conference on Communications",

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

}

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 - 2010/8/13

Y1 - 2010/8/13

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

UR - https://www.scopus.com/pages/publications/77955411095

U2 - 10.1109/ICC.2010.5502539

DO - 10.1109/ICC.2010.5502539

M3 - Conference contribution

AN - SCOPUS:77955411095

SN - 9781424464043

BT - IEEE International Conference on Communications

T2 - 2010 IEEE International Conference on Communications, ICC 2010

Y2 - 23 May 2010 through 27 May 2010

ER -

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

Abstract

Conference

Keywords / Materials (for Non-textual outputs)

Access to Document

Other files and links

Fingerprint

Cite this