The Asymptotic Performance of the Linear MMSE Receiver for Spatial Multiplexing System with Channel Estimation Errors

Qiang LI
Jiansong GAN
Yunzhou LI
Shidong ZHOU

IEICE TRANSACTIONS on Communications   Vol.E90-B    No.4    pp.994-997
Publication Date: 2007/04/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.4.994
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
spatial multiplexing,  LMMSE receiver,  channel estimation errors,  asymptotic convergence,  

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Spatial multiplexing (SM) offers a linear increase in transmission rate without bandwidth expansion or power increase. In SM systems, the LMMSE receiver establishes a good tradeoff between the complexity and performance. The performance of the LMMSE receiver would be degraded by MIMO channel estimation errors. This letter focus on obtaining the asymptotic convergence of output interference power and SIR performance for the LMMSE receiver with channel uncertainty. Exactly matched simulation results verify the validity of analysis in the large-system assumption. Furthermore, we find that the analytical results are also valid in the sense of average results for limited-scale system in spite of the asymptotic assumption used in derivation.