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SPCp1-07: Low-Complexity Mutual Information-Based Antenna Grouping Scheme for a D-STTD System

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2 Author(s)
Hoojin Lee ; Dept. of Electr. & Comput. Eng., Univ. of Texas at Austin, Austin, TX ; Powers, E.J.

By providing both spatial diversity and multiplexing gains simultaneously, double space-time transmit diversity (D-STTD) is considered a promising technique for future multiple antenna wireless systems. Although originally proposed D-STTD is an open-loop scheme, transmit antenna grouping (also called antenna shuffling) with low-rate feedback information from the receiver can significantly improve the performance of open-loop D-STTD even in spatially correlated Rayleigh fading channels, since the antenna grouping method selects the best antenna grouping pattern corresponding to the channel realization. In this paper we propose a new antenna grouping method based on the criterion of maximum mutual information. Showing the same performance improvement as the existing antenna grouping method based on the criterion of maximum post-processing signal-to-noise ratio (SNR), the proposed low-complexity mutual information-based antenna grouping method can be performed with less complexity. We verify the effectiveness of our proposed method by numerical simulations even for a spatial correlation channel model based on practical channel measurements.

Published in:

Global Telecommunications Conference, 2006. GLOBECOM '06. IEEE

Date of Conference:

Nov. 27 2006-Dec. 1 2006