基于两点调制技术的GMSK调制器的设计及实现  

Design and implementation of GMSK modulator on two-point modulation technology

作　　者：李言胜[1] 任扬扬 马瑞宁[1] 南西[1] 

机构地区：[1]青岛理工大学通信与电子工程学院,青岛266033

出　　处：《青岛理工大学学报》2014年第2期102-107,共6页Journal of Qingdao University of Technology

基　　金：山东省自然科学基金资助项目(ZR2010FM011);教育部留学回国人员科研启动基金资助项目(教外司留[2010]609号第38批)

摘　　要：对锁相环路的两点调制技术进行了理论分析,并运用MATLAB工具分别给出了不同调制方式下的频率相应特性曲线.基于CMX7045、PLL及VCO完成了高斯滤波最小频移键控(GMSK)载波调制电路的设计和制作,并对其进行了性能测试.结果表明两点调制技术可提高系统的频率响应特性及载频的稳定度.A two-point modulation technology based on phase-locked loop（PLL） is analyzed theoretically,and frequency response characteristic curves are given under different modulation situations using MATLAB tools in this paper. A Gaussian filtered minimum shift key （GMSK） modulation circuit is designed and completed based on CMX7045 chip, PLL chip and VCO, and its performance is tested. The results show that the two-point modulation technology can improve the frequency response characteristics of the system and the stability of the carrier frequency.

关 键 词：两点调制 锁相环 高斯滤波最小频移键控(GMSK) 频率响应特性 

分 类 号：TN836[电子电信—信息与通信工程]