无线紫外光MIMO通信系统信道容量估算方法  

Channel capacity estimation method for wireless ultraviolet MIMO communication system

作　　者：赵庆[1] 张琰[1] 沈海莲 ZHAO Qing;ZHANG Yan;SHEN Hailian(Wuchang Institute of Technology,WuHan 430065,China)

机构地区：[1]武昌工学院,武汉430065

出　　处：《激光杂志》2024年第4期177-181,共5页Laser Journal

基　　金：湖北省高等学校优秀中青年科技创新团队计划项目(No.2021XK01)。

摘　　要：无线紫外光通信系统易受大气散射等因素的影响,导致通信信道容量估算准确率较低。为此,提出一种无线紫外光多入多出(Multiple-Input Multiple-Output, MIMO)通信系统信道容量估算方法。根据信道特征,构建无线紫外光MIMO通信系统的信道容量估计模型,获取无线紫外光的单次散射传输特性,利用符号补码式的方法改进空时编码,设定高级检测器中符号的接收能耗,使每个符号保持在标准功率数值范围内,完成通信系统信道检测式编码。根据不同发射角和接收角计算无线紫外光通信的路径损耗比,通过泊松随机分布获得最终通信系统信道容量的估算结果。实验结果表明,所提方法的传输速率可高达8 Mbps,误码率始终低于10-3bit/s,估算准确率在90%以上,估计时间低于4 ms,估算效果好,可为通信行业发展提供理论依据。Wireless ultraviolet communication system is vulnerable to atmospheric scattering and other factors,resulting in low accuracy of communication channel capacity estimation.To this end,a channel capacity estimation method for wireless ultraviolet multiple-input multiple-output(MIMO)communication system is proposed.According to the channel characteristics,the channel capacity estimation model of the wireless ultraviolet MIMO communication system is constructed,the single scattering transmission characteristics of wireless ultraviolet light,the space time coding is improved by using the symbol complement method,and the received energy consumption of the symbols in the advanced detector is set,so that each symbol is kept within the standard power value range,and the channel detection coding of the communication system is completed.The path loss ratio of wireless UV communication is calculated according to different transmission and reception angles,and the final channel capacity of the communication system is estimated by Poisson random distribution.The experimental results show that the transmission rate of the proposed method can be as high as 8 Mbps,the bit error rate is always less than 10-3 bit/s,the estimation accuracy is more than 90%,the estimation time is less than 4 ms,and the estimation effect is good,which can provide a theoretical basis for the development of the communication industry.

关 键 词：路径损耗 无线紫外光 信道容量 信噪比 信道衰减 MIMO通信系统 

分 类 号：TN929.12[电子电信—通信与信息系统]