Exact sum-rate analysis of MIMO broadcast channels with random unitary beamforming based on quantized sinr feedback

Hong Chuan Yang, Peng Lu, Hyung Ki Sung, Young-Chai Ko

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

8 Citations (Scopus)

Abstract

There is a continuing interest in low-complexity multiuser MIMO transmission techniques based on random unitary beamforming (RUB). Different RUB schemes mandate different amount of feedback to exploit the multiuser diversity gain for sum-rate capacity benefits. In this paper, we investigate the tradeoff of sum-rate capacity versus feedback load between different RUB schemes through accurate statistical analysis. Specifically, we derive the exact sum-rate expressions for two RUB schemes based on quantized signal-to-interference-plus- noise ratio (SINR) feedback. These analysis are accompanied by the development of the complete statistical characterizations of ordered SINRs for a user, which can find their application in many other related problems. We show through selected numerical examples that the additional feedback of the quantized values of best beam SINR from each user can help considerably improve the sum-rate performance of RUB systems.

Original languageEnglish
Title of host publicationIEEE International Conference on Communications
Pages3669-3673
Number of pages5
DOIs
Publication statusPublished - 2008 Sep 12
EventIEEE International Conference on Communications, ICC 2008 - Beijing, China
Duration: 2008 May 192008 May 23

Other

OtherIEEE International Conference on Communications, ICC 2008
CountryChina
CityBeijing
Period08/5/1908/5/23

Keywords

  • Capacity analysis
  • Multiuser diversity
  • Multiuser MIMO
  • Random beamforming

ASJC Scopus subject areas

  • Media Technology

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  • Cite this

    Yang, H. C., Lu, P., Sung, H. K., & Ko, Y-C. (2008). Exact sum-rate analysis of MIMO broadcast channels with random unitary beamforming based on quantized sinr feedback. In IEEE International Conference on Communications (pp. 3669-3673). [4533726] https://doi.org/10.1109/ICC.2008.690