摘要
研究了强大气湍流情况下基于拉盖尔计数的自由空间光通信性能,发送端采用开关键控,接收端采用最大似然检测。还推导了采用发射分集技术的负指数信道误码率公式。理论计算与蒙特卡洛仿真结果一致。仿真表明,相比单输入单输出光通信系统,采用多输入单输出的光通信系统可以改善受强大气湍流和背景噪声影响的自由空间光通信性能。
The performances of Bit Error Rate（BER） of Free Space Optical（FSO） in strong atmospheric turbulence conditions are investigated based on Laguerre-counting model. The On-Off Keying（OOK） modulation and Maximum Likelihood（ML） detection are adopted. The BER expressions for FSO links with transmit diversity are derived as well. Numerical results and Monte Carlo simulation results are presented identically. Compared with the Single-Input Single-Output（SISO） scheme, the diversity gain by using the Multiple-Input Single-Output（MISO） scheme can compensate for the performance loss induced by the strong turbulence and background radiation.
出处
《太赫兹科学与电子信息学报》
2013年第3期406-410,共5页
Journal of Terahertz Science and Electronic Information Technology
基金
国家高科技研究与发展计划(863)资助项目(2011AA100701)
国家自然科学基金资助项目(60802011)
国家科技重大专项资助项目(2012ZX03001013-004
2011ZX03003
2010ZX03002)
关键词
自由空间光通信
发射分集
强大气湍流
拉盖尔计数
Free-Space Optical
transmit diversity
strong atmospheric turbulence
Laguerre-counting
