紫外通信与感知一体化:建模与系统优化  

Unified ultraviolet communication and sensing:modeling and system optimization

作　　者：龚晨 潘昱宸[1,2] 徐正元 GONG Chen;PAN Yuchen;XU Zhengyuan(School of Information Science and Technology,University of Science and Technology of China,Hefei 230027,China;Key Laboratory of Wireless-Optical Communications,Chinese Academy of Sciences,Hefei 230027,China)

机构地区：[1]中国科学技术大学信息科学技术学院,安徽合肥230027 [2]中国科学院无线光电通信重点实验室,安徽合肥230027

出　　处：《通信学报》2023年第9期1-11,共11页Journal on Communications

基　　金：国家自然科学基金资助项目(No.62171428)。

摘　　要：针对目前结合感知的通信研究很少,需要建立通信感知一体化的信号模型及系统联合设计优化框架。基于此,给出了紫外通信与感知一体化框架,包括一个发射端、一个感知探测端与一个通信接收端。发射端发射调制信号到通信接收端,进行信息传输。借助于紫外光的非视距散射特性,部分调制信号分量散射至未知探测目标并继续反射到达感知探测端,感知探测端基于接收到的信号进行目标探测。凝练通信收发端信号的互信息作为通信性能指标,感知探测端在给定虚警率下的漏检概率作为感知性能指标,并分析两者与发射端调制参数(高电平功率、低电平功率与先验概率)的关系。分析结果表明了通信与感知性能的权衡关系,并指出了高电平功率应该设定为峰值功率,低电平功率与先验概率应该作为系统设计参数进行优化,在给定互信息下界时最小化漏检概率。Currently,there exist few communication works which combine with sensing.It is necessary to build up a unified communication and sensing signal model and system joint design optimization framework.Based on this,a unified ultraviolet communication and sensing framework was proposed,consisting of a transmitter,a sensing detector and a communication receiver.The transmitter sent modulated signals to the communication receiver for information transmission.Due to the non-line of sight scattering effect,certain components of the transmitted signals reached the unknown target which further reflected to the sensing detector for target detection.Two performance metrics for communication and sensing were considered,including the mutual information between the transmitted symbol and the signal at the communication receiver,and the miss detection probability for the target detector.The relationship between the two metrics and the transmission parameters was further analyzed,including the transmission power for the high-level signal,the transmission power for the low-level signal,and the prior probabilities.The results demonstrate a tradeoff between the communication performance metric and sensing performance metric.It is also shown that the power for the high-level signal should be set to be the peak power,and the power for the low-level signal and the prior probabilities should be optimized,to minimize the miss detection probability given a lower bound on the mutual information.

关 键 词：紫外通信 通信感知一体化 系统优化 

分 类 号：TN929.1[电子电信—通信与信息系统]