Differential Spatial Modulation With Gray Coded Antenna Activation Order
Differential Spatial Modulation With Gray Coded Antenna Activation Order
复制标题
DOI：
10.1109/lcomm.2016.2557801
复制
发表时间：
2015-09
期刊：
影响因子：
--
通讯作者：
Jun Li;Miaowen Wen;Xiang Cheng;Yier Yan;S. Song;M. Lee
中科院分区：
文献类型：
--
作者：
Jun Li;Miaowen Wen;Xiang Cheng;Yier Yan;S. Song;M. Lee
在这封信中，我们提出了一个格雷码顺序的天线索引排列差分空间调制（DSM）。为了便于实现，著名的Trotter-Johnson排名和unranking算法，这导致类似的计算复杂性，现有的DSM使用字典顺序。文中还分析了所提出的格雷码序比字典序所获得的信噪比增益，并通过仿真进行了验证。基于Gray编码框架，我们进一步提出了一种分集增强方案，称为I-Gray码序，其中有源天线索引的排列直接从Gray码序中全排列的奇（偶）位中选取.从分析和仿真，它表明，I-格雷码阶可以收获一个额外的发送分集阶数相对于格雷码阶数。
In this letter, we propose a gray code order of antenna index permutations for differential spatial modulation (DSM). To facilitate the implementation, the well-known Trotter-Johnson ranking and unranking algorithms are adopted, which result in similar computational complexity to the existing DSM that uses the lexicographic order. The signal-to-noise ratio gain achieved by the proposed gray code order over the lexicographic order is also analyzed and verified via simulations. Based on the gray coding framework, we further propose a diversity-enhancing scheme named intersected gray (I-gray) code order, where the permutations of active antenna indices are selected directly from the odd (or even) positions of the full permutations in the gray code order. From analysis and simulations, it is shown that the I-gray code order can harvest an additional transmit diversity order with respect to the gray code order.