上海交通大学学报(英文版) ›› 2013, Vol. 18 ›› Issue (2): 180-185.doi: 10.1007/s12204-013-1381-6
QIAN Cheng* (钱成), ZHANG Meng (张萌), LUO Han-wen (罗汉文), LIU Wei (刘伟)
QIAN Cheng* (钱成), ZHANG Meng (张萌), LUO Han-wen (罗汉文), LIU Wei (刘伟)
摘要: Existing minimum-mean-squared-error (MMSE) transceiver designs in amplified-and-forward (AF) multiple-input multiple-output (MIMO) two-way relay systems all assume a linear precoder at the sources. Nonlinear source precoders in such a system have not been considered yet. In this paper, we study the joint design of source Tomlinson-Harashima precoders (THPs), relay linear precoder and MMSE receivers in two-way relay systems. This joint design problem is a highly nonconvex optimization problem. By dividing the original problem into three sub-problems, we propose an iterative algorithm to optimize precoders and receivers. The convergence of the algorithm is ensured since the updated solution is optimal to each sub-problem. Numerical simulation results show that the proposed iterative algorithm outperforms other algorithms in the high signal-to-noise ratio (SNR) region.
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