摘要
用泰勒级数的展开形式表示高动态的多普勒频率参数,推导了信号非线性变换后相邻数据样本的相位差与多普勒频率、一次变化率、二次变化率等多普勒频率参数的关系,由此建立了方程组并通过解方程实现无需任何先验信息的多普勒频率参数盲估计。仿真实验验证了该方法对M进制相移键控(M-ary phase shift keying,MPSK)、M进制正交幅度调制(M-ary quadrature amplitude modulation,MQAM)等常用卫星通信信号的可行性和有效性。
Firstly,high dynamic Doppler parameters are expressed with Taylor series.Then,the relationship of Doppler frequency shift,the first order derivative and the second order derivative with the phase difference of adjacent data samples is deduced after signal nonlinear transform.Finally,an equation set is constructed and Doppler parameters are blindly estimated by solving the equations without any prior knowledge.Simulation results validate the method＇s feasibility and availability for commonly used satellite communication signals,such as M-ary phase shift keying（MPSK）,M-ary quadrature amplitude modulation（MQAM） and so on.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2010年第4期674-677,共4页
Systems Engineering and Electronics
基金
湖南省优秀博士论文基金
国防科技大学优秀研究生创新资助课题
关键词
信息处理技术
盲估计
多普勒频率参数
卫星通信信号
information processing technology
blind estimation
Doppler parameter
satellite communication signal
