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A MIMO LTE Precoding Codebook Based on Fast Diagonal Weighted Matrices  

Park, Ju-Yong (Shyngyeong University)
Peng, Bu Shi (Chonbuk National University)
Lee, Moon-Ho (Chonbuk National University)
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Abstract
In this paper, a fast diagonal-weighted Jacket matrices (DWJMs) is proposed to have the orthogonal architecture. We develop the successive DWJM to reduce the computational load while factorizing the large-order DWJMs into the low-order sparse matrices with the fast algorithms. The proposed DWJM is then applied to the precoding multiple-input and multiple output (MIMO) wireless communications because of its diagonal-weighted framework with element-wise inverse characteristics. Based on the properties of the DWJM, the DWJM can be used as alternative open loop cyclic delay diversity (CDD) precoding, which has recently become part of the cellular communications systems. Performance of the DWJM-based precoding system is verified for orthogonal space-time block code (OSTBC) MIMO LTE systems.
Keywords
Diagonal weighted Jacket matrix; 3GPP-LTE; MIMO precoding;
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