Robust Transceiver Optimization for Downlink Coordinated Base Station Systems: Distributed Algorithm

This paper considers the joint transceiver design for downlink multiuser multiple-input single-output (MISO) systems with coordinated base stations (BSs) where imperfect channel state information (CSI) is available at the BSs and mobile stations (MSs). By incorporating antenna correlation at the BSs...

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Bibliographic Details
Published in:IEEE transactions on signal processing 2012-01, Vol.60 (1), p.337-350
Main Authors: Bogale, T. E., Vandendorpe, L., Chalise, B. K.
Format: Article
Language:English
Subjects:
Antennas
Applied sciences
Correlation
Detection, estimation, filtering, equalization, prediction
Distributed algorithms
Distributed optimization and convex optimization
Downlink
Exact sciences and technology
Information, signal and communications theory
multiuser multiple-input multiple-output (MIMO)
Receivers
robust transceiver
Robustness
Signal and communications theory
Signal, noise
Telecommunications and information theory
Transceivers
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Summary:This paper considers the joint transceiver design for downlink multiuser multiple-input single-output (MISO) systems with coordinated base stations (BSs) where imperfect channel state information (CSI) is available at the BSs and mobile stations (MSs). By incorporating antenna correlation at the BSs and taking channel estimation errors into account, we solve two robust design problems: (1) minimizing the weighted sum of mean-square-error (MSE) with per BS antenna power constraint, and (2) minimizing the total power of all BSs with per user MSE target and per BS antenna power constraints. These problems are solved as follows. First, for fixed receivers, we propose centralized and novel computationally efficient distributed algorithms to jointly optimize the precoders of all users. Our centralized algorithms employ the second-order-cone programming (SOCP) approach, whereas, our novel distributed algorithms use the Lagrangian dual decomposition, modified matrix fractional minimization and an iterative method. Second, for fixed BS precoders, the receivers are updated by the minimum mean-square-error (MMSE) criterion. These two steps are repeated until convergence is achieved. In all of our simulation results, we have observed that the proposed distributed algorithms achieve the same performance as that of the centralized algorithms. Moreover, computer simulations verify the robustness of the proposed robust designs compared to the nonrobust/naive designs.
ISSN:1053-587X
1941-0476
DOI:10.1109/TSP.2011.2170167