摘要
基于无线激光通信(自由空间光通信,FSO)的研究中,空时编码分为空时分组码(STBC)、分层空时码(LSTC)、空时网格码(STTC)。通过PPM调制下的概率论和信源的熵得出空时分组码信道容量的公式,采用PPM调制下的蒙特卡罗仿真方法、公式推论方法,对不同天线数进行仿真实验。实验结果表明,信道容量的变化随空时分组码天线数目的变大而增大、随天线数目的变大信噪比相应变小、随天线数目的变大误码率相应的变小。
In the research based on the research of wireless laser communication(Free Space Optical Communication:FSO),Space-Time Coding is divided Space-Time Block Code(STBC),Layered SpaceTime Code(LSTC),Space-Time Trellis Code(STTC).Through the probability theory under PPM and the entropy of the source to obtain the formula of the Space-Time Block Code channel capacity is obtained,the Monte Carto simulation method under PPM and the formula inference method are adopted,the experimental results show that the channel capacity increases with the increase of the number of antennas,the SNR decreases with the increase of the number of antennas,and the bit error rate(Ber)decreases with the increase of the antennas.
作者
李静
LI Jing(Shaanxi Provincial University of Construction Workers,Xi’an 710068,China)
出处
《电子设计工程》
2021年第14期7-10,共4页
Electronic Design Engineering
基金
国家自然科学基金(60977054)。
