双模turbo码在光无线通信系统中的应用

摘要

Optical wireless communication（OWC） system bonds the advantage of fiber communication and radio communication,it springs up again along with the development of the progress of the semiconductor lasers and optoelectronic detectors.The main advantages of OWC system are that high bandwidth,large capacity,quick deployment,flexibility,low cost,license-free allocation,so it has widely promising application.However the OWC system＇s transmission medium is atmospheric channel,the atmospheric channel seriously impact the communication quality.In this dissertation,we focus on double modul turbo coded OWC system in order to eliminate atmospheric channel disturb.%光无线通信（OWC）技术结合了光纤通信和无线电通信的优势,随着半导体激光器技术和光电探测器件的日益完善而重新兴起。光无线通信具有宽带大容量、安装快捷、机动灵活、低成本、无需频率申请等优点,具有广阔的应用前景。但光无线通信是以大气信道作为传输媒介,因此大气信道对光无线通信系统的影响较大。文章主要针对光无线通信系统中大气信道的干扰而采取的信道编码方案双模turbo码技术开展了深入的理论研究。