摘要
高斯最小频移键控(Gaussian Filtered Minimum Shift Keying,GMSK)是一种连续相位非线性调制方式,具有包络恒定、相位平滑、频谱特性好和带外辐射功率小等多种优点,在移动通信和航天测控等领域得到广泛应用。介绍了GMSK的基本原理,并从频谱效率和包络特性两方面与其他调制方式进行对比分析。同时介绍了几种典型的非相干解调方式,并利用Matlab软件对不同解调方法的性能进行仿真。
Gaussian Filtered Minimum Shift Keying（ GMSK） is a kind of nonlinear continuous phase modulation,with advantages of constant envelope,smooth phase,good spectrum characteristics,lower out-of-band radiation power,widely used in mobile communications and aerospace telemetry and control. This paper introduces the basic principle of GMSK,compared with other modulation methods in spectrum efficiency and envelope characteristics. In the meantime,several typical noncoherent demodulation methods are introduced,and their performance are simulated by using Matlab software.
出处
《无线电工程》
2017年第12期61-66,82,共7页
Radio Engineering
基金
中国博士后科学基金资助项目(2016M601286)
