A QoS aware eigenmode based power allocation scheme for MIMO-OFDM multi-user systems

Yubo Yang*, Lin Tian, Gengfa Fang, Jinglin Shi, Zhongcheng Li

*Corresponding author for this work

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

3 Citations (Scopus)
6 Downloads (Pure)

Abstract

In this paper, a practical eigenmode based scheduling algorithm with double loops (ESDL) is proposed for multi-user MIMO/OFDM systems. The wireless channels are decomposed into several eigenmodes, and the eigenmode based power allocation is formulated into an optimization problem, whose object is to maximize the system capacity while guaranteeing users' QoS requirements. By replacing the QoS constraints with penalty functions, the problem is reformulated to a penalty problem with a given penalty factor, which is solved by a greedy power allocation (GPA) scheme as the inner loop. The penalty factor is then updated in the outer loop according to QoS constraints. Numerical results show that compared with other algorithms proposed in the literature, ESDL can result in significant improvement in channel efficiency, while at the same time guaranteeing minimum data rates of users.

Original languageEnglish
Title of host publicationIEEE GLOBECOM 2007 - 2007 IEEE Global Telecommunications Conference, Proceedings
Pages3164-3168
Number of pages5
DOIs
Publication statusPublished - 2007
Event50th Annual IEEE Global Telecommunications Conference, GLOBECOM 2007 - Washington, DC, United States
Duration: 26 Nov 200730 Nov 2007

Other

Other50th Annual IEEE Global Telecommunications Conference, GLOBECOM 2007
CountryUnited States
CityWashington, DC
Period26/11/0730/11/07

Bibliographical note

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