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Erschienen in: Wireless Personal Communications 2/2015

01.09.2015

Precoding of Space–Time Block Codes for Relay Networks over Correlated MIMO Channels

verfasst von: Youyan Zhang, Youming Li, Gang Wang, Ming Jin

Erschienen in: Wireless Personal Communications | Ausgabe 2/2015

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Abstract

In this paper, we consider the precoder design at both the source and relay nodes of MIMO relay networks to minimize the symbol error rate (SER) based on the statistical channel state information. First compact SER expressions are derived, then the optimization problem of designing the precoding matrices is formulated. This problem is highly nonlinear and nonconvex. We propose a two-step method by exploiting the correlations of the source-relay and relay-destination links. In the first step the two precoding matrices are proved to be in the eigenvector directions of the transmit correlation matrices. In the second step, the original joint problem is decomposed into two independent sub-problems which can be solved in lower complexity. Simulation results show that the precoding system combined with orthogonal space–time block codes (STBC) outperforms the STBC-only system in terms of SER, especially at low signal-to-noise ratios.

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Metadaten
Titel
Precoding of Space–Time Block Codes for Relay Networks over Correlated MIMO Channels
verfasst von
Youyan Zhang
Youming Li
Gang Wang
Ming Jin
Publikationsdatum
01.09.2015
Verlag
Springer US
Erschienen in
Wireless Personal Communications / Ausgabe 2/2015
Print ISSN: 0929-6212
Elektronische ISSN: 1572-834X
DOI
https://doi.org/10.1007/s11277-015-2693-7

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