一种改进的GMSK全数字正交调制算法  

An Improved Digitalized GMSK Quadrature Modulation Algorithm

作　　者：白昊[1] 任泽宇[1] 

机构地区：[1]西安电子工程研究所,西安710100

出　　处：《火控雷达技术》2016年第3期38-42,共5页Fire Control Radar Technology

摘　　要：高斯滤波最小频移键控(GMSK)作为一种常用的调制技术,具有包络恒定、相位连续及频带利用率高等优点,但工程实现较复杂。为降低硬件实现难度,本文以GMSK正交调制常规算法为依据,通过对该算法中求解相位的核心公式进行变形处理,重新确定相位表里面的波形存储值,改进后的算法合理可行、节省硬件资源且易于工程实现,与传统算法性能相当。GMSK （Gaussian Minimum-Shift Keying） has characteristics of constant envelope, continuous phase and good spectrum efficiency as a common modulation method, but its engineering implementation is complex. To reduce the difficulty of hardware implementation, the core formula for solving the phase in the algorithm has been improved based on conventional GMSK quadrature modulation algorithm. The value of waveform storage in the phase table is reestablished, the final result indicates that the computational complexity and hardware implementa- tion difficulty are both reduced by using this algorithm.

关 键 词：GMSK 波形存储 高斯滤波器 正交调制 

分 类 号：TN958[电子电信—信号与信息处理]