Improved Linear Transmit Processing for Single-User and Multi-User MIMO Communications Systems
Xiao, P and Sellathurai, M (2010) Improved Linear Transmit Processing for Single-User and Multi-User MIMO Communications Systems IEEE Transactions on Signal Processing, 58 (3). 1768 - 1779. ISSN 1053-587X
J12.pdf - Accepted Version
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In this paper, we propose a novel linear transmit precoding strategy for multiple-input, multiple-output (MIMO) systems employing improper signal constellations. In particular, improved zero-forcing (ZF) and minimum mean square error (MMSE) precoders are derived based on modified cost functions, and are shown to achieve a superior performance without loss of spectrum efficiency compared to the conventional linear and nonlinear precoders. The superiority of the proposed precoders over the conventional solutions are verified by both simulation and analytical results. The novel approach to precoding design is also applied to the case of an imperfect channel estimate with a known error covariance as well as to the multi-user scenario where precoding based on the nullspace of channel transmission matrix is employed to decouple multi-user channels. In both cases, the improved precoding schemes yield significant performance gain compared to the conventional counterparts.
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|Divisions:||Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Communication Systems Research|
|Depositing User:||Symplectic Elements|
|Date Deposited:||08 Mar 2012 14:31|
|Last Modified:||23 Sep 2013 19:18|
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