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Non-linear Transceiver Designs with Imperfect CSIT Using Convex Optimization

Ubaidulla, P and Chockalingam, A (2009) Non-linear Transceiver Designs with Imperfect CSIT Using Convex Optimization. In: IEEE Wireless Communications and Networking Conference, Apr 05-08, 2009, Budapest, Hungary, pp. 368-373.

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Abstract

In this paper, we consider non-linear transceiver designs for multiuser multi-input multi-output (MIMO) down-link in the presence of imperfections in the channel state information at the transmitter (CSIT). The base station (BS) is equipped with multiple transmit antennas and each user terminal is equipped with multiple receive antennas. The BS employs Tomlinson-Harashima precoding (THP) for inter-user interference pre-cancellation at the transmitter. We investigate robust THP transceiver designs based on the minimization of BS transmit power with mean square error (MSE) constraints, and balancing of MSE among users with a constraint on the total BS transmit power. We show that these design problems can be solved by iterative algorithms, wherein each iteration involves a pair of convex optimization problems. The robustness of the proposed algorithms to imperfections in CSIT is illustrated through simulations.

Item Type: Conference Paper
Additional Information: Copyright 2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 13 Jan 2010 09:48
Last Modified: 13 Jan 2010 09:48
URI: http://eprints.iisc.ernet.in/id/eprint/25182

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