QPSK调制解调技术的仿真与研究  

Simulation and Research of QPSK Modulation and Demodulation Technology

作　　者：孙会楠[1] SUN Huinan(School of Data Science and Information Engineering,Harbin Huade University,Harbin 150025,China)

机构地区：[1]哈尔滨华德学院数据科学与信息工程学院,哈尔滨150025

出　　处：《常熟理工学院学报》2024年第2期71-78,共8页Journal of Changshu Institute of Technology

摘　　要：给出全数字QPSK接收机和发射机的总体方案框图以及同步系统的详细设计方案,对FFT辅助的松尾环载波同步系统模块、Gardner位同步系统主要模块、巴克码帧同步系统主要模块进行理论分析和推导,为整机系统实现奠定理论基础.对系统接收机和发射机的各个模块进行MATLAB仿真,提取出同频同相的本地载波信号,成功获得最佳采样点及寻找到帧头,正确还原出调制信号,验证了本文设计系统的合理性.Both the block diagram of the overall scheme of the all-digital QPSK receiver and transmitter and the detailed design scheme of the synchronization system are given.The theoretical analysis and derivation of the loose tail ring carrier synchronization system module assisted by FFT,the main module of the Gardner bit synchronization system,and the main module of the Barker frame synchronization system are carried out,which lays a theoretical foundation for the realization of the whole system.The MATLAB simulation of each module of the system receiver and transmitter is carried out to extract the local carrier signal of the same frequency and phase,which successfully obtains the best sampling point,finds the frame head,and correctly restores the modulated signal,all verifying the rationality of the system designed in this paper.

关 键 词：QPSK FFT松尾环 GARDNER 巴克码 

分 类 号：TH77[机械工程—仪器科学与技术]