摘要
近年来,紫外光通信系统由于其是非视距通信的优势而受到广泛关注。由于大气对紫外光强烈的散射作用,紫外通信的距离和误码率受到影响。大气的散射作用将导致多径效应,从而产生码间干扰和导致显著的衰减。为此,研究了一种具有光子计数接收机的ACO-OFDM系统。OFDM技术用于克服多径导致的码间干扰(ISI),光子计数用于检测经过强烈衰减后接收端的微弱光信号。最后,使用Monte-Carlo仿真系统在不同信道条件下的性能。根据仿真结果,发射光功率为2mW时,在500m处的误码率可达到10^(-4)以下。因此,光子计数ACO-OFDM紫外光系统具有低发射功率情况下良好的无线传输数据性能。
In recent years,ultraviolet(UV)communication systems have gained widely attention because of its advantages in NLOS communication.However,the bit-error-rate and the communication distance are restricted by strong atmospheric scattering and absorption.Atmospheric scattering will lead to multipath interference in transmitting symbols and significant attenuation.An ACO-OFDM system with photon-counting receiver has been studied.OFDM is used to overcome the inter-symbol interference(ISI)which is attributed to multipath effect.Photon counting is applied to detect weak light signal,which is vital for overcoming the strong attenuation of UV channel.Monte-Carlo method is used to simulate this scheme in different situations.According to the simulation results,when the transmitted light power is 2mW,the bit error rate at 500 mcan reach 10-4 below.
作者
沈岱灵
周小林
魏陈佳
SHEN Dailing;ZHOU Xiaolin;WEI Chenjia(Key Laboratory of EMW Information,School of Electronic and Information Engineering,Fudan University,Shanghai 200433)
出处
《微型电脑应用》
2019年第2期5-8,共4页
Microcomputer Applications
基金
国家自然科学基金项目(61571135)
