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Euclidean Geometry LDPC-VBLAST System Design and Performance Evaluation

TitleEuclidean Geometry LDPC-VBLAST System Design and Performance Evaluation
Publication TypeJournal Article
Year of Publication2009
AuthorsPoocharoen, P., and M. E. Magana
JournalWireless Personal Communications
Volume50
Issue3
Pagination401 - 416
Date Published08/2009
ISSN1572-834X
KeywordsEuclidean geometry, low density parity check codes, maximum-likelihood detection, MIMO system, VBLAST, weighted bit flipping decoding
Abstract

Among popular multi-transmit and multi-receive antennas techniques, the VBLAST (Vertical Bell Laboratories Layered Space-Time) architecture has been shown to be a good solution for wireless communications applications that require the transmission of data at high rates. Recently, the application of efficient error correction coding schemes such as low density parity-check (LDPC) codes to systems with multi-transmit and multi-receive antennas has shown to significantly improve bit error rate performance. Although irregular LDPC codes with non-structure are quite popular due to the ease of constructing the parity check matrices and their very good error rate performance, the complexity of the encoder is high. Simple implementation of both encoder and decoder can be an asset in wireless communications applications. In this paper, we study the application of Euclidean geometry LDPC codes to the VBLAST system. We assess system performance using different code parameters and different numbers of antennas via Monte-Carlo simulation and show that the combination of Euclidean geometry LDPC codes and VBLAST can significantly improve bit error rate performance. We also show that interleaving data is necessary to improve performance of LDPC codes when a higher number of antennas is, used in order to mitigate the effect of error propagation. The simplicity of the implementation of both encoder and decoder makes Euclidean geometry LDPC codes with VBLAST system attractive and suitable for practical applications.

DOI10.1007/s11277-008-9612-0
Short TitleWireless Pers Commun