User group selection scheme for lattice-reduction-aided precoder in MIMO broadcast systems

Heekwang Lee, Dongyoung Kwon, Woohyun Seo, Sungsoo Park, Jemin Lee, Seungjoo Maeng, Jaeho Jeon, Daesik Hong

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In multiple-input multiple-output (MIMO) broadcast channel, the lattice-reduction-aided (LRA) precoder is the modified zero-forcing beamforming (ZFBF) scheme which perturbs data symbols to reduce the transmit power. In this paper, we propose the optimal user group selection (UGS) scheme for the LRA-precoder to maximize the sum-rate in MIMO broadcast systems. We derive the approximated sum-rate of the LRA-precoder and the optimal UGS scheme. We also propose a suboptimal UGS scheme which requires low-complexity. From the simulation results, we show that the sum-rate of the proposed LRA-precoder with the optimal UGS scheme outperforms that of the conventional ZFBF with its optimal UGS scheme, especially when the number of users is small. In addition, we also show that the proposed LRA-precoder with the suboptimal UGS scheme has a considerably larger sum-rate than the conventional ZFBF with its suboptimal scheme, especially when the transmit correlation exists.

Original languageEnglish
Title of host publication2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010
Pages247-251
Number of pages5
DOIs
Publication statusPublished - 2010 Dec 1
Event2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010 - Istanbul, Turkey
Duration: 2010 Sep 262010 Sep 30

Publication series

NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC

Other

Other2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010
CountryTurkey
CityIstanbul
Period10/9/2610/9/30

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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    Lee, H., Kwon, D., Seo, W., Park, S., Lee, J., Maeng, S., Jeon, J., & Hong, D. (2010). User group selection scheme for lattice-reduction-aided precoder in MIMO broadcast systems. In 2010 IEEE 21st International Symposium on Personal Indoor and Mobile Radio Communications, PIMRC 2010 (pp. 247-251). [5671738] (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC). https://doi.org/10.1109/PIMRC.2010.5671738