Optimizing the spectral efficiency of multiuser MIMO smart antenna systems

Kai Kit Wong, R. D. Murch, R. S K Cheng, Khaled Letaief

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

14 Citations (Scopus)

Abstract

In recent years, several smart antenna systems have been proposed and demonstrated in wireless communications systems, and these have shown that significant system performance improvement is possible. In this paper, we consider the maximization of the spectral efficiency of a multiuser MIMO system for downlink communications (one base to many mobiles) in both frequency flat and selective fading channels. Each mobile (user) in the system incorporates an array of nR antennas and in general transmits Km ≥ 1 space-time subchannels, in the same frequency spectrum and time slot. Our objective is to jointly find the antenna weights for all the users, under the constraint of fixed transmit power, so that the spectral efficiency of the system (or the average spectral efficiency per user) is maximized. An iterative procedure that successively nulls out all the broadcast interference is proposed, and simulation results show that multiuser MIMO optimization significantly outperforms single-user MIMO optimization. In addition, spectral efficiency close to an upper bound can be achieved.

Original languageEnglish
Title of host publication2000 IEEE Wireless Communications and Networking Conference
Pages426-430
Number of pages5
Publication statusPublished - 2000
Externally publishedYes
Event2000 IEEE Wireless Communications and Networking Conference - Chicago, IL, United States
Duration: 23 Sep 200028 Sep 2000

Other

Other2000 IEEE Wireless Communications and Networking Conference
CountryUnited States
CityChicago, IL
Period23/9/0028/9/00

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ASJC Scopus subject areas

  • Engineering(all)

Cite this

Wong, K. K., Murch, R. D., Cheng, R. S. K., & Letaief, K. (2000). Optimizing the spectral efficiency of multiuser MIMO smart antenna systems. In 2000 IEEE Wireless Communications and Networking Conference (pp. 426-430)