基于PFM的宽角度红外光音频通信系统  

Infrared Wireless Audio Communication System Based on PFM Method

作　　者：廖仕利[1] 李文杰[1] 赵立鑫 

机构地区：[1]重庆理工大学电子信息与自动化学院,重庆400054

出　　处：《重庆理工大学学报（自然科学）》2015年第8期99-103,123,共6页Journal of Chongqing University of Technology：Natural Science

基　　金：国家级大学生创新创业训练计划项目(201411660006)

摘　　要：针对红外光通信存在的调制解调复杂、传输距离短等问题,提于一种新颖的脉冲频率（pulse frequency modulation,PFM）调制方式,并设计了4阶带通滤波器滤除带通噪声,构建接收转发电路延长了传输距离。研制了一套宽角度的红外光音频传输系统。音频传输实验结果表明：该系统实现了较好的音频传输效果,降低了红外光通信系统在传输过程中的功率损耗,延长了传输距离,同时实现了0°~360°传输方向的自主调节,表明本系统具有良好的工程应用价值。In order to overcome complex modem and short distance transmission in infrared wireless communication, a novel PFM method was proposed and the fourth-order band-pass filter was designed to remove noise, and relay transceiver circuit was build to extend the transmission distance. Audio transmission experiment results show that the methods is effective to achieve the good effect of audio transmission, also reduces transmission power loss and extends the transmission distance and wide angle（0° - 360°） transmission. Experimental results show that this system has good engineering application value.

关 键 词：红外光通信 脉冲频率调制 带通滤波器 接收转发电路 

分 类 号：TN929[电子电信—通信与信息系统]