摘要
针对弱湍流信道劣化紫外光非直视通信质量问题,文章基于对数正态模型,提出采用OOK调制闪烁衰减的误码率公式。仿真对比表明:在弱湍流信道中,闪烁衰减导致光强概率密度分布曲线偏离光强均值,引起信噪比恶化;湍流强度越强,通信系统的误码率越高;相同条件下,最大比合并(MRC)性能最佳,等增益合并(EGC)次之,选择性合并(SC)最差。且天线数量增加,能提升紫外光通信系统效能。
Aiming at the problem that the weak turbulence channel degrades the quality of UV light NLOS communication,the bit error rate formula using OOK modulation flicker attenuation is derived for the log normal model.The simulation results show that in the weak turbulence channel,flicker attenuation leads to the deviation of the light intensity probability density distribution curve from the light intensity mean value,resulting in the deterioration of the signal-to-noise ratio.The stronger the turbulence intensity is,the higher the bit error rate of the communication system is.Under the same conditions,the maximum ratio combining(MRC)has the best performance,the equal gain combining(EGC)takes the second place,and the selective combining(SC)is the worst.With the increase of the number of antennas,the performance of the UV light communication system can be improved.
作者
冯克涛
李晓毅
张小孟
朱刚
王邠
FENG Ketao;LI Xiaoyi;ZHANG Xiaomeng;ZHU Gang;WANG Bin(Unit 31306 of PLA,Chengdu 610036,China;Communication Sergeant School,The Army Engineering University of PLA,Chongqing 400035,China;Unit 31700 of PLA,Liaoyang 111000,China)
出处
《现代信息科技》
2024年第9期1-7,共7页
Modern Information Technology
基金
军内科研项目(KYCQJWJK1703)。
关键词
紫外光
非直视
分集接收
闪烁衰减
UV light
Non Line-of-Sight
diversity reception
scintillation attenuation
