结合天线选择的空间调制及性能仿真

Spatial modulation with antenna selection and performance simulation

提出了一种分组映射空间调制方案。每个时隙中有多个发射天线被同时激活,结合幅度相位调制技术,每根选中的天线发射不同的符号,并且所激活的特定天线序列也携带相应信息。相对传统空间调制技术而言,该方案可以有效地提高空间调制系统的频带利用率和传输速率。Rayleigh衰落信道的仿真结果表明,所提方案的误比特率(Bit Error Rate,BER)性能优于传统的空间调制与多输入多输出(Multi-Input Multi-Output,MIMO)技术。方案可进一步结合发射天线选择(Antenna Selection,AS)技术,提高系统的传输质量。实际多极化MIMO信道的测量和仿真结果表明,在发端天线选择数目均相同时,分组映射调制的性能明显优于空间调制,结合AS的调制系统性能明显优于未结合AS的系统。

A Block Mapping Spatial Modulation （BMSM） scheme is proposed. Multiple antennas are activated at any one time instant. Besides the information bits transmitted by the active multiple antennas with the amplitude and/ or phase modulation techniques, some other information bits are carried by specifically activated antenna indices. Compared with the conventional Spatial Modulation （SM） technique, the proposed scheme can increase the spectral efficiency of conventional SM system effectively. The simulation results in the Rayleigh fading channel exhibits that the Bit Error Rate （BER） performance of the proposed scheme is better than those of original SM and MIMO multiple antennas techniques. Combined with the transmit Antenna Selection （AS） technology, the communication quality can be further improved. The measurement and simulation results in actual multi-polarization MIMO channel under the condition of the same number of selected transmit antenna show that the BMSM scheme behaves better than traditional SM, the performance of modulation system combined AS outperforms system without combining AS.