On convergence properties of joint optimal power control and transmit-receive beamforming in multi-user MIMO systems
2006 (English)In: 2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications, NEW YORK: IEEE , 2006, 234-238 p.Conference paper (Refereed)
We consider SDMA in a multi-user downlink MIMO system with several access points, each serving one or more users. The problem of minimizing the total transmitted power satisfying the SINR requirements at all users is considered. This is a non-linear and non-convex optimization problem with three sets of variables: the transmitter powers, the transmitter weights and the receiver weights. Global system knowledge will be assumed at the access points and the provided results can be seen as benchmarks in system performance. We present a new initialization strategy and investigate its convergence behavior for a proposed algorithm. A numerical study is performed to analyze the dependence of the target SINRs on the optimal solution. The performance of this initialization process is evaluated and compared to an existing beamforming algorithm.
Place, publisher, year, edition, pages
NEW YORK: IEEE , 2006. 234-238 p.
SDMA, multi-user MIMO systems, multi-user downlink MIMO system, nonconvex optimization problem, optimal power control, transmit-receive beamforming
IdentifiersURN: urn:nbn:se:kth:diva-34949DOI: 10.1109/SPAWC.2006.346345ISI: 000246147200048ScopusID: 2-s2.0-48749110871OAI: oai:DiVA.org:kth-34949DiVA: diva2:427429
7th IEEE Workshop on Signal Processing Advances in Wireless Communications Cannes, FRANCE, JUL 02-05, 2006
QC 201106282011-06-282011-06-172012-01-23Bibliographically approved