A bit allocation scheme for MIMO equal gain precoders

Chi Liang Chao*, Shang-Ho Tsai, Terng-Yin Hsu

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We consider the design of the equal gain precoder in flat-fading and limited feedback multiple-input multiple-output (MIMO) systems. The advantage of the equal gain precoder based on the scalar quantization (SQ) is that it is easier to encode the feedback information and no need to construct codebook in advance. In the sort of precoder, the bit allocation methods will dominate the system performance. In this paper, we explore an efficient bit allocation algorithm for the scalar quantized equal gain precoder. The proposed bit allocation scheme can improve the performance of the straightforward scalar quantized equal gain precoder. Compared to the optimal bit allocation scheme with exhaustive search, the proposed algorithm greatly reduces the computational complexity while the performance is near to the optimal scheme.

Original languageEnglish
Title of host publication2010 IEEE 71st Vehicular Technology
DOIs
StatePublished - 30 Jul 2010
Event2010 IEEE 71st Vehicular Technology Conference, VTC 2010-Spring - Taipei, Taiwan
Duration: 16 May 201019 May 2010

Publication series

NameIEEE Vehicular Technology Conference
ISSN (Print)1550-2252

Conference

Conference2010 IEEE 71st Vehicular Technology Conference, VTC 2010-Spring
CountryTaiwan
CityTaipei
Period16/05/1019/05/10

Keywords

  • Equal gain precoder
  • Llimited feedback
  • MIMO
  • Scalar quantization (SQ)

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