A reduced-complexity multi-user MIMO precoding scheme with sorted-QR decomposition and block-based power allocation

Chih Hsiang Lin; Pei Yun Tsai

doi:10.1109/ITST.2011.6060137

A reduced-complexity multi-user MIMO precoding scheme with sorted-QR decomposition and block-based power allocation

Chih Hsiang Lin, Pei Yun Tsai

Department of Electrical Engineering

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

4 Scopus citations

Abstract

In this paper, we propose a reduced-complexity multi-user MIMO precoding scheme based on sorted-QR decomposition suitable for green applications. In addition, a new power allocation strategy is proposed that approaches optimized BER with low arithmetic complexity. The proposed block-based power allocation strategy allocates adequate power to the deeply-faded spatial pipe, which improves bit-error-rate performance. It also partitions the remaining pipes into several blocks with elements of similar magnitude to reduce complexity by exploiting the matrix property after sorted QR decomposition. Finally, the Tomlinson-Harashima precoding is used to get rid of multiple access interference and inter-antenna interference in advance at transmitters. Simulation results show that our proposed scheme is competitive to block-based geometric mean decomposition systems with much reduced arithmetic complexity. Moreover, the proposed scheme shows its superiority when more users are supported in 12×12 antenna configuration, which can be established in fixed and moderate-size transmitters such as the road side unit in intelligent transportation systems.

Original language	English
Title of host publication	2011 11th International Conference on ITS Telecommunications, ITST 2011
Pages	658-662
Number of pages	5
DOIs	https://doi.org/10.1109/ITST.2011.6060137
State	Published - 2011
Event	2011 11th International Conference on ITS Telecommunications, ITST 2011 - St. Petersburg, Russian Federation Duration: 23 Aug 2011 → 25 Aug 2011

Publication series

Name	2011 11th International Conference on ITS Telecommunications, ITST 2011

Conference

Conference	2011 11th International Conference on ITS Telecommunications, ITST 2011
Country/Territory	Russian Federation
City	St. Petersburg
Period	23/08/11 → 25/08/11

Keywords

multi-user MIMO
power allocation
sorted QR decomposition
Tomlinson-Harashima precoding

Access to Document

10.1109/ITST.2011.6060137

Cite this

Lin, C. H., & Tsai, P. Y. (2011). A reduced-complexity multi-user MIMO precoding scheme with sorted-QR decomposition and block-based power allocation. In 2011 11th International Conference on ITS Telecommunications, ITST 2011 (pp. 658-662). Article 6060137 (2011 11th International Conference on ITS Telecommunications, ITST 2011). https://doi.org/10.1109/ITST.2011.6060137

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Lin, CH & Tsai, PY 2011, A reduced-complexity multi-user MIMO precoding scheme with sorted-QR decomposition and block-based power allocation. in 2011 11th International Conference on ITS Telecommunications, ITST 2011., 6060137, 2011 11th International Conference on ITS Telecommunications, ITST 2011, pp. 658-662, 2011 11th International Conference on ITS Telecommunications, ITST 2011, St. Petersburg, Russian Federation, 23/08/11. https://doi.org/10.1109/ITST.2011.6060137

A reduced-complexity multi-user MIMO precoding scheme with sorted-QR decomposition and block-based power allocation. / Lin, Chih Hsiang; Tsai, Pei Yun.
2011 11th International Conference on ITS Telecommunications, ITST 2011. 2011. p. 658-662 6060137 (2011 11th International Conference on ITS Telecommunications, ITST 2011).

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

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A reduced-complexity multi-user MIMO precoding scheme with sorted-QR decomposition and block-based power allocation

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