基于Exponentiated Weibull模型的M-PPM调制空间光链路误码性能

摘要

本文研究了Exponentiated Weibull大气湍流下光链路误码性能,考虑大气湍流和指向误差对误码率的联合影响,利用Meijier'G函数推导出误码率的闭合表达式.根据误码率闭合表达式进行了仿真,分析了在不同大气湍流强度、PPM调制阶数、抖动标准差和波束宽度条件下,链路误码率随发射功率变化的关系.通过仿真分析证明:不同调制阶数,增大发射功率对链路误码性能的改善近乎相同;随着湍流强度、抖动标准差和波束宽度的增加,误码率增加.%To study the effects of the Exponentiated Weibull atmosphere turbulence and pointing errors on the bit error rate(BER),BER performance of the optical communication link is investigated.The closed-form expression of BER is derived based on a Meijer's G function.The relationship between the BER performance and the transmitting optical power under different parameters such as the atmosphere turbulence,PPM modulation order,the normalized jitter standard deviation and the normalized beam-width are analyzed by simulation.Simulation results show that the improvement effect of different modulation orders and increasing transmitting power on BER is almost the same,and BER increases with the increase of turbulence intensity,the normalized jitter standard deviation and the normalized beamwidth.