基于单光子探测器恢复时间的误码率分析  

Analysis of BER model of single-photon detector recovery time

作　　者：李晓亮 刘荣科[1] 王岩[3] 王建军 刘向南 LI Xiaoliang;LIU Rongke;WANG Yan;WANG Jianjun;LIU Xiangnan(School of Electronics and Information Engineering,Beihang University,Beijing 100191,China;Beijing Research Institute of Telemetry,Beijing 100094,China;People's Liberation Army 63618 Troops,Korla 841000,China)

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191 [2]北京遥测技术研究所,北京100094 [3]中国人民解放军63618部队,库尔勒841000

出　　处：《遥测遥控》2023年第1期15-21,共7页Journal of Telemetry,Tracking and Command

基　　金：国防基础科研项目(JCKY2020560B001)。

摘　　要：在深空激光通信中,为满足通信距离远、传输速率高的要求,常采用脉冲位置调制(Pulse Position Modula-tion,PPM)与单光子探测器(Single-Photon Detector,SPD)相结合的探测体制。本文从单光子探测器的恢复时间特性出发,推导了探测器单元探测概率和虚警概率模型,建立了基于信号或硬判决和最大计数硬判决的多元单光子探测器阵列误码率模型。仿真分析结果表明:在16-PPM调制和RS(15,8)编码(Reed-Solomon Codes,里德-所罗门编码)体制下,为实现1.22 Gbps的通信速率、误码率优于10-7,当探测器单元数为4时,探测器恢复时间应≤3.2 ns;当探测器单元数为25时,探测器恢复时间应≤10 ns。In deep space laser communication,in order to meet the requirements of long communication distance and high communication rate,the detection system combining PPM and single-photon detector is often used.Starting from the recovery time characteristics of single-photon detectors,this paper derives the detector unit detection probability and false alarm probability models,and establishes a multivariate single-photon detector array BER model based on signal“or”hard judgment and maximum count value judgment.Simulation analysis results show that in the 16-PPM and RS(15,8)coding system,in order to achieve a rate of 1.22 Gbps,the BER is better than 10-7 communication,when the number of detectors is 4,the detector recovery time should be equalor less than 3.2 ns,when the number of detector units is 25,the detector recovery time should be equalor less than 10 ns.

关 键 词：深空激光通信 PPM 单光子探测器 恢复时间 误码率模型 

分 类 号：TN929.1[电子电信—通信与信息系统] V443.1[电子电信—信息与通信工程]