Balanced Linear Precoding in Decode-and-Forward Based MIMO Relay Communications

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This paper proposes a linear precoding technique for multiple-input multiple-output (MIMO) decode-and-forward (DF) based relay communications. The proposed precoder is constructed by linearly combining two independently designed precoders that maximize data rates at relay and destination, respectively. Contrary to conventional precoding in DF relay communications, the proposed precoding balances direct and relay links and maximize the achievable rate of the overall system. We also propose a distributed precoder design method using limited information. The proposed algorithms are shown to significantly reduce computation complexity of precoder design. The numerical results show that the proposed precoders with full information and limited information achieve significantly higher data rates than conventional precoding neglecting a direct link and comparable data rate to the optimal precoding even when the coefficients for linear combining are restricted to real numbers.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2011-07
Language
English
Article Type
Article
Keywords

USER COOPERATION DIVERSITY; WIRELESS NETWORKS; CHANNELS; CAPACITY; PROTOCOLS

Citation

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, v.10, no.7, pp.2390 - 2400

ISSN
1536-1276
URI
http://hdl.handle.net/10203/99271
Appears in Collection
EE-Journal Papers(저널논문)
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