Optimal power allocation for MSE and bit-loading in MIMO systems and the impact of correlation

Thomas Haustein, Holger Boche

Research output: Contribution to journalConference articlepeer-review

18 Scopus citations

Abstract

In this paper, the optimal power allocation to minimize the mean square error (MSE) in MIMO systems with and without channel knowledge at the transmitter (Tx) is investigated. Furthermore the impact of correlation is discussed. We show that for MIMO systems with no channel knowledge at the Tx correlation will increases the MSE at the receiver. This does not hold in general when channel knowledge is available at the Tx. The optimum transmit solution can then be obtained by solving a MSE minimization problem. Based on this solution we present a bit loading algorithm which matches the optimum power allocation with a set of finite modulation alphabets with the constraint to certain bit error rate requirements.

Original languageEnglish
Pages (from-to)405-408
Number of pages4
JournalICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Volume4
StatePublished - 2003
Externally publishedYes
Event2003 IEEE International Conference on Accoustics, Speech, and Signal Processing - Hong Kong, Hong Kong
Duration: 6 Apr 200310 Apr 2003

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