激光与光电子学进展, 2008, 45 (5): 60, 网络出版: 2008-05-20
一种无线光通信中脉冲位置调制的符号同步方法
Symbol Synchronization for Pulse Position Modulation in Optical Wireless Communications
光通信 脉冲位置调制 符号同步 帧同步 optical communications pulse position modulation symbol synchronization frame synchronization
摘要
脉冲位置调制(pulse position modulation， PPM)是无线光通信的经典调制方式之一。符号同步是实现PPM正确解调的关键技术。在分析帧同步码型和长度要求的基础上，设计了一种PPM帧结构，提出了利用帧同步来实现PPM符号同步的方法。论述了其工作原理，并分析了其同步性能。结果表明该方法建立时间短，同步概率高，并具有自动调整功能，可实现性强。
Abstract
Pulse position modulation (PPM) is a key modulation technique for optical wireless communications. Symbol synchronization for PPM is necessary for accurate demodulation. A novel symbol synchronization is presented with frame synchronization of PPM. On the basis of analyzing frame sync code pattern and length， a PPM frame scheme is designed. The performance of frame synchronization is studied after addressing its operation principle. The results show that the method has the merits of short build-up time, high sync probability self-adjustment and sound practicality.
张铁英, 王红星, 解传军. 一种无线光通信中脉冲位置调制的符号同步方法[J]. 激光与光电子学进展, 2008, 45(5): 60. Zhang Tieying, Wang Hongxing, Xie Chuanjun. Symbol Synchronization for Pulse Position Modulation in Optical Wireless Communications[J]. Laser & Optoelectronics Progress, 2008, 45(5): 60.
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