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Tomlinson-Harashima Precoding with Substream Permutations Based on the Bit Rate Maximization for Single-User MIMO Systems
Shigenori KINJO Shuichi OHNO
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2015/05/01
Online ISSN: 1745-1337
Type of Manuscript: PAPER
Category: Communication Theory and Signals
Tomlinson-Harashima precoding, SU-MIMO, zero forcing, bit rate, substream permutations,
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In this paper, we propose a zero-forcing (ZF) Tomlinson-Harashima precoding (THP) with substream permutations based on the bit rate maximization for single-user MIMO (SU-MIMO) systems. We study the effect of substream permutations on the ZF-THP SU-MIMO systems, when the mean squared error (MSE) and the bit rate are adopted for the selection of the permutation matrix as criteria. Based on our analysis, we propose a method to increase the bit rate by substream permutations, and derive QR and Cholesky decomposition-based algorithms which realize the proposed method. Furthermore, to improve the error rate performance, we apply zero transmission to subchannels with low signal-to-noise ratios. Numerical examples are provided to demonstrate the effectiveness of the proposed THP MIMO system.