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Neighbor-dmin precoder for three data-stream MIMO systems

机译：用于三个数据流MIMO系统的邻居-d min 预编码器

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摘要

A new precoding strategy, which considers not only the minimum Euclidean distance but also the number of neighbors providing the distance d, is proposed. Firstly, a new parameterized form of Neighbor-d precoder is presented, where all angles containing the phase are assumed to be zero to reduce the number of difference vectors providing d. The optimization problem is, therefore, less complex and the new precoder has less distinct expressions. When a rectangular QAM modulation is used at the transmitter, the general Neighbor-d precoder for three independent data-streams is proposed. This precoder has only three expressions, which allocate power on one, two, and three virtual subchannels, respectively. Simulation results over Rayleigh fading channels confirm a significant bit-error-rate improvement of the new precoder in comparison with other traditional precoding strategies.
机译：提出了一种新的预编码策略，该策略不仅考虑最小欧几里得距离，而且考虑提供距离d的邻居数。首先，提出了一种新的参数化形式的Neighbor-d预编码器，其中包含相位的所有角度都假定为零，以减少提供d的差分矢量的数量。因此，优化问题不那么复杂，并且新的预编码器具有较少的不同表达式。当在发射机处使用矩形QAM调制时，提出了用于三个独立数据流的通用Neighbor-d预编码器。该预编码器只有三个表达式，分别在一个，两个和三个虚拟子信道上分配功率。与其他传统预编码策略相比，瑞利衰落信道上的仿真结果证实了新预编码器的显着误码率改善。

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