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Precoded FIR and Redundant V-BLAST Systems for Frequency-Selective MIMO Channels

Chen, Chun-yang and Vaidyanathan, P. P. (2007) Precoded FIR and Redundant V-BLAST Systems for Frequency-Selective MIMO Channels. IEEE Transactions on Signal Processing, 55 (7, Par). pp. 3390-3404. ISSN 1053-587X. doi:10.1109/TSP.2007.894400.

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The vertical Bell labs layered space-time (V-BLAST) system is a multi-input multioutput (MIMO) system designed to achieve good multiplexing gain. In recent literature, a precoder, which exploits channel information, has been added in the V-BLAST transmitter. This precoder forces each symbol stream to have an identical mean square error (MSE). It can be viewed as an alternative to the bit-loading method. In this paper, this precoded V-BLAST system is extended to the case of frequency-selective MIMO channels. Both the FIR and redundant types of transceivers, which use cyclic-prefixing and zero-padding, are considered. A fast algorithm for computing a cyclic-prefixing-based precoded V-BLAST transceiver is developed. Experiments show that the proposed methods with redundancy have better performance than the SVD-based system with optimal powerloading and bit loading for frequency-selective MIMO channels. The gain comes from the fact that the MSE-equalizing precoder has better bit-error rate performance than the optimal bitloading method.

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Vaidyanathan, P. P.0000-0003-3003-7042
Additional Information:© 2007 IEEE. Reprinted with permission. Manuscript received January 19, 2006; revised October 19, 2006. [Posted online: 2007-06-18] This work was supported in part by the National Science Foundation under Grant CCF-0428326, in part by ONR Grant N00014-06-1-0011, and in part by the California Institute of Technology. The associate editor coordinating the review of this manuscript and approving it for publication was Dr. Martin Haardt.
Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-06-1-0011
Subject Keywords:Bit loading, decision feedback equalizer (DFE), frequency-selective multi-input multioutput (MIMO) channels, intersymbol-interference (ISI) MIMO channels, MIMO orthogonal frequency-division multiplexing (OFDM), precoder, vertical Bell labs layered space-time (V-BLAST)
Issue or Number:7, Par
Record Number:CaltechAUTHORS:CHEissstsp07a
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8517
Deposited By: Archive Administrator
Deposited On:17 Aug 2007
Last Modified:08 Nov 2021 20:50

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