一种直扩MSK信号的码相位跟踪方法  

A code phase tracing method for DSSS-MSK signal

作　　者：朱唯唯[1] 王芮[1] 张家庆[1] 谢仁宏[1] 

机构地区：[1]南京理工大学电子工程与光电技术学院,南京210094

出　　处：《信息技术》2017年第5期132-136,共5页Information Technology

摘　　要：为了解决传统的直扩MSK系统中码相位跟踪模块的固有问题,采用了一种串行直扩MSK信号系统模型。串行系统将接收到的直扩MSK信号经匹配滤波器转换成直扩BPSK信号,根据匹配滤波器已知的频率响应,用凸优化技术设计出所需滤波器系数。再运用适用于BPSK信号的完备的超前-滞后延迟锁相环技术,解决了传统MSK系统中码跟踪技术原有的困难。与现有的适用于MSK信号的超前-滞后延迟锁相环技术相比,这种串行系统的码跟踪算法拥有鉴相增益更大、环抖动更小、锁定时间更短等优势。In order to solve the inherent problem in the DSSS-MSK(direct sequence spread spectrum communication system,DSSS,Minimum Shift Keying,MSK) code phase tracking module of the traditional system,a serial DSSS-MSK signal model of the system was proposed.The serial system turned the received DSSS-MSK signal into DSSS-BPSK signal by the matched filter,the matched filter was designed according to the known frequency response using convex optimization.And then the complete advanced-lag delay lock loop was used,solving the existing difficulties of code tracking technology in the traditional DSSS-MSK system.Compared to the advanced-lag delay lock loop technology in the traditional DSSS-MSK system,this code phase tracing method of the serial DSSS-MSK system has the advantages of greater phase gain,smaller loop shake and shorter lock time.

关 键 词：码相位跟踪 串行调制 MSK 凸优化 超前-滞后延迟锁相环 

分 类 号：TN914.42[电子电信—通信与信息系统]