A closed-form approximation for capacity of multiuser MIMO broadcast systems: A virtual user approach

Li-Chun Wang*, Chu Jung Yeh, Chi Fang Li

*Corresponding author for this work

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

1 Scopus citations

Abstract

Besides delivering high data rates in a point-to-point scenario, multi-input multi-output (MIMO) antenna techniques can broadcast personalized data to multiple users in the point-to-multipoint scenario. Zero-forcing beamforming (ZFB) is a suboptimal but simple MIMO broadcast technique, which basically decouple the MIMO channel into many parallel singleinput single-output (SISO) channels. In this article, we first derive the closed-form expression for the sum rate of the ZFB MIMO broadcast system with random user selection. Secondly, under the condition with finite users, we develop a virtual user approach approximation method for estimating the sum rate of the ZFB MIMO broadcast system with exhaustive user selection. Our results indicate that the proposed analysis method can accurately estimate the optimal sum-rate throughput of ZFB.

Original languageEnglish
Title of host publicationWCNC 2008 - IEEE Wireless Communications and Networking Conference, Conference Proceedings
Pages408-412
Number of pages5
DOIs
StatePublished - 18 Sep 2008
EventIEEE Wireless Communications and Networking Conference, WCNC 2008 - Las Vegas, NV, United States
Duration: 31 Mar 20083 Apr 2008

Publication series

NameIEEE Wireless Communications and Networking Conference, WCNC
ISSN (Print)1525-3511

Conference

ConferenceIEEE Wireless Communications and Networking Conference, WCNC 2008
CountryUnited States
CityLas Vegas, NV
Period31/03/083/04/08

Keywords

  • MIMO broadcast channels.
  • MIMO systems
  • Scheduling
  • Zero-forcing beamforming

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    Wang, L-C., Yeh, C. J., & Li, C. F. (2008). A closed-form approximation for capacity of multiuser MIMO broadcast systems: A virtual user approach. In WCNC 2008 - IEEE Wireless Communications and Networking Conference, Conference Proceedings (pp. 408-412). [4489108] (IEEE Wireless Communications and Networking Conference, WCNC). https://doi.org/10.1109/WCNC.2008.77