双联合收发空间调制方案设计与性能分析

针对当前社会对高速率以及高效率日益增长的需求，提出了一种双联合收发空间调制(double joint transceiver spatial modulation, DJSM)方案, 在传统联合收发空间调制(joint transceiver spatial modulation, JSM)的基础上加入双空间调制(double spatial modulation, DSM), 提高空间调制(spatial modulation, SM)系统的信息传输速率和可靠性。DJSM方案中, 发送端通过进行两次独立SM过程, 将输入信息的比特序列分别映射至两个调制符号以及各自对应的激活发送天线分组, 从而显著提高系统频谱效率。为区分两调制符号, 在发送前会对其进行角度旋转最优化处理。基于联合上界技术，本文给出了DJSM方案的平均比特错误概率(average bit error probability, ABEP)。仿真结果表明本文所提DJSM方案的ABEP性能明显优于传统JSM方案和正交联合收发空间调制方案。

Design and performance analysis of double joint transceiver spatial modulation scheme

In response to the current society's increasing demand for high speed and high efficiency, a double joint transceiver spatial modulation (DJSM) scheme is proposed, which combines traditional joint transceiver spatial modulation (JSM) with double spatial modulation (DSM) for improving the system information bit rate and transmission reliability of spatial modulation (SM) system. In the proposed DJSM scheme, the transmitter carries out two independent SM processes, and the bit sequence of input information is mapped to two modulated symbols and the corresponding activated transmit antenna groups, respectively. The spectral efficiency of the DJSM system can be significantly improved. In order to distinguish the two modulated symbols, an optimal angle rotation is performed before the transmission. And the average bit error probability (ABEP) of the DJSM scheme has been derived based on the union bound technique. Simulation results show that the proposed DJSM scheme achieves much better ABEP performance compared with the traditional JSM scheme and orthogonal joint transceiver spatial modulation scheme.