基于线性近似的GMSK信号调制及其信道估计  

Channel estimation based on GMSK linear modulation

作　　者：辛富国 李荣芳 

机构地区：[1]陕西邮电职业技术学院,陕西咸阳712000

出　　处：《信息技术》2014年第9期129-131,共3页Information Technology

摘　　要：高斯滤波最小移频键控(GMSK,Gaussian Filtered Minimum Shift Keying)由于采用高斯滤波,相位调制和部分响应信道,因此属于非线性调制方式,实现复杂度比较高。从GMSK调制特点出发,通过近似处理的手段,给出了一种线性的调制方式,同时基于这种线性调制方式,推导了对应的信道估计,最后与常用的LS估计进行了性能对比,结果显示基于近似线性调制的信道估计具有明显的优势。GMSK modulation （Gaussian Filtered Minimum Shift Keying ） belongs to nonlinear modulation type, since it applies Gaussian filter, phase modulation and part impulse channel. For the reasons mentioned above, the implementation of GMSK modulation has very high complexity. This paper proposed a linear modulation type by using approximated method based on the characteristics of GMSK modulation, and derivates the corresponding channel estimation in this environment. The simulation results show that the performance of this channel estimation based on linear method is better than LS.

关 键 词：GMSK 信道估计 GSM 

分 类 号：TN971[电子电信—信号与信息处理]