Worst-case optimized V-BLAST receiver design for imperfect MIMO channels

Authors:
Jiansong Chen;Xiaoli Yu
Affiliations:
Communication Science Institute, Dept. of Electrical Engineering, University of Southern California, Los Angeles;Communication Science Institute, Dept. of Electrical Engineering, University of Southern California, Los Angeles
Venue:
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
Year:
2006

Citing 5
Cited 0

Robust minimum variance beamforming

IEEE Transactions on Signal Processing
A competitive minimax approach to robust estimation of random parameters

IEEE Transactions on Signal Processing
Worst-case MSE precoder design for imperfectly known MIMO communications channels

IEEE Transactions on Signal Processing - Part I
Robust adaptive beamforming using worst-case performance optimization: a solution to the signal mismatch problem

IEEE Transactions on Signal Processing
Simplified processing for high spectral efficiency wireless communication employing multi-element arrays

IEEE Journal on Selected Areas in Communications

Quantified Score

Hi-index	0.00

Visualization

Abstract

V-BLAST systems require perfect knowledge of the channel at the receiver, which could be impractical in real world. The channel state information (CSI) that contains the unknown estimation error will hurdle the zero forcing based intersymbol interference nulling and symbol detection ordering in V-BLAST. This paper extends the V-BLAST scheme to the imperfect CSI under the assumption that the channel estimation errors are unknown and norm-bounded. The extension consists of novel worst-case optimized zero forcing nulling and symbol detection ordering. In each layer, the zero-forcing nulling is designed to minimize the worst case error power due to the imperfect channel estimation, while the order of symbol detection is organized to detect the symbol corresponding to the best worst-case post-processing signal over interference plus noise ratio (SINR). We have shown in computer simulations that the proposed algorithm considerably outperforms the standard ZF V-BLAST in the worst case CSI, while making no significant degradation in non worst-case scenarios.