SDPSK调制信号参数估计  

Parameters Estimation of SDPSK Modulation Signal

作　　者：张庆[1] 王丽珍[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电通信技术》2011年第3期51-53,共3页Radio Communications Technology

摘　　要：对称差分相移键控(Symmetrical Differential Phase Shift Keying,SDPSK)调制限带传输时包络起伏小,更适合在非线性信道中使用,因而日益受到重视。通过分析SDPSK调制信号特性,推导出码速率、载频等调制参数估计方法,并利用线性调频Z变换(Chirp-Z Transformation)算法对估计结果进行了修正,测量精度得到进一步提高。Matlab仿真试验表明,该算法参数估计精度高,运算量小,易于硬件实现。SDPSK is a modulation technique with small envelope variations and is more suitable for transmission in nonlinear channel,so it is widely used in military field.The estimation method of carrier frequency and bit rate are deduced by analyzing the characteristics of SDPSK signal.The measurement accuracy of estimation results is improved by Chirp-z transformation algorithm.Matlab simulation results indicate that the algorithm is with high accuracy,small amount of calculation and easiness of hardware implementation.

关 键 词：SDPSK 参数估计 CHIRP-Z变换 MATLAB仿真 

分 类 号：TN911[电子电信—通信与信息系统]