空间光通信视音频同步无线传输技术研究

发布时间：2018-01-07 09:13

本文关键词：空间光通信视音频同步无线传输技术研究　出处：《激光与红外》2017年11期 　论文类型：期刊论文

【摘要】：设计并演示一个可实现视音频信号同步无线传输的自由空间光通信系统。该系统包括信号发生、调制和接收模块。对由信号发生模块输出的视音频信号进行时分复用(TDM),复用信号以电信号形式作用于声光调制器(AOM)并将其加载于入射到AOM的激光束上,AOM输出调制光信号,最后接收模块还原出视音频信号。整个通信系统带宽为6.7 MHz,通过电-光-电转换过程,将时分复用和声光调制相结合实现了视音频信号同步无线传输。本系统针对具体工作环境,自建核心电路:时分复用/解复用电路和输出光端机电路,采用单片机调控输出信号质量。实验证明该系统具备成本低廉、实用性强和灵活性高等优点,为监控系统、应急通信等应用场合提供一种简易有效的视音频信号同步无线传输方案。
[Abstract]:Design and demonstrate a realization of free space optical communication system of audio and video synchronization signal wireless transmission. The system comprises a signal receiving module, modulation and multiplexing of video and audio. The signal from the signal generating module output (TDM), multiplexed signal to electrical signal form on the acousto-optic modulator (AOM) and the loading to the incident laser beam to the AOM, AOM output modulated light signal receiving module, finally restore the audio signal. The communication system bandwidth is 6.7 MHz, the photoelectric conversion process, time-division multiplexing and modulation is realized by combining video and audio signal synchronous wireless transmission. The system for specific work the environment, built the core circuit: time division multiplexing / demultiplexing circuit and an output optical transceiver circuit, the MCU control output signal quality. The experiment shows that the system has the advantages of low cost, strong practicability and high flexibility It provides a simple and effective video and audio signal synchronization wireless transmission scheme for monitoring system, emergency communication and other applications.

【作者单位】：暨南大学光电信息与传感技术广东普通高校重点实验室;暨南大学光电工程系;广东省第二强制隔离戒毒所;
【基金】：广东省教育厅创新基金项目(No.2013KJCX0022) 国家自然科学基金项目(No.61275046;No.61475067) 中央高校科研专项基金项目(No.11615454)资助
【分类号】：TN929.1
【正文快照】： 1引言伴随激光与光纤的诞生,人类通信史便进入光通信时代。常用的光通信方式有光纤通信、激光通信、可见光通信[1]等。把激光作为通信光源、大气为传输信道的通信方式称为光通信。大气激光通信又称为自由空间光通信(Free-Space Optical Commu-nication,FSO)[2],较微波通信和光

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