摘要
从GMSK调制原理出发,分析了GMSK信号的特征,依据正交调制理论,由CPM调制的公式推导出GMSK调制的载波相位和正交I、Q分量运算公式,并提出以DSP、FPGA、DUC为平台的GMSK调制算法实现方案。文中方案成功用于某测试仪项目,根据用户需求选择码元类型、码元速率、BTb值、载波频率等参数实现了GMSK调制信号的产生。
This paper analyzes the character of GMSK signals from the theory of GMSK modulation, and designs I and Q algorithm formula of GMSK signal based on quadrature modulate theory. It also designs a GMSK modulate method based on DSP, FPGA and DUC. In the end it realized GMSK modulation, which is used in one testing instrument item and succeeded in modulating GMSK signals at different kinds of symbol, different symbol rate, different value of BTb and different frequency of carrier wave.
出处
《信息技术》
2014年第11期171-174,共4页
Information Technology
