NDLI: Capacity optimization for Rician correlated MIMO wireless channels

Content Provider	IEEE Xplore Digital Library
Author	Vu, M. Paulraj, A.
Copyright Year	2005
Description	Author affiliation: Dept. of Electr. Eng., Stanford Univ., CA (Vu, M.; Paulraj, A.)
Abstract	We develop an optimization program to calculate the ergodic capacity and the optimal input signal covariance of a Rician correlated MIMO wireless channel. The program employs the Newton method and the barrier interior-point method to solve convex stochastic formulations, using efficient gradient and Hessian calculations. We then use the program to study impacts of the channel mean, the transmit correlation, and the K factor on channel capacity and the optimal input signal, revealing curious optimal signal characteristics at high SNR, where mode-dropping can always occur for a channel with strong mean or strong correlation. We also compare the capacity with the mutual information obtained by the signaling solution optimal for the Jensen bound. Results reveal a close approximation for systems with equal or fewer transmit than receive antennas at all SNR, and for those with more transmit than receive antennas at low SNR. The approximation diverges for the latter system at high SNR, depending on the transmit correlation and the channel mean, or the Rician K factor
Starting Page	133
Ending Page	138
File Size	313449
Page Count	6
File Format	PDF
ISBN	1424401313
ISSN	10586393
DOI	10.1109/ACSSC.2005.1599718
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-10-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Rician channels MIMO Receiving antennas Transmitting antennas Signal analysis Covariance matrix Channel capacity Mutual information Statistical distributions Optimization methods
Content Type	Text
Resource Type	Article
Subject	Signal Processing Computer Networks and Communications

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