高速移动条件下相移键控解调的设计与仿真  

Design and simulation of demodulation of phase shift keying in a high speed telemetry system

作　　者：常树龙[1] 杨硕[2] 

机构地区：[1]中国空空导弹研究院,河南洛阳471099 [2]中国人民解放军驻中国空空导弹研究院军代表室,河南洛阳471099

出　　处：《电子设计工程》2015年第6期85-87,91,共4页Electronic Design Engineering

摘　　要：相移键控调制技术具有较高带宽利用率、优良的抗噪声性能等特点,在高速数据传输率的遥测系统中具有广泛的应用。针对高速移动条件下采用相移键控调制方法的遥测系统,采用多普勒频移进行估计和校正方法,对遥测系统中的解调技术进行设计与仿真。首先,介绍多普勒频偏对相移键控调制方式的影响。其次,对于常用的四相相移键控和八相相移键控调制和解调技术进行讨论。最后,通过对高速移动条件下遥测接收系统的仿真结果对比,验证了文中所提方法的可行性。Due to its high bandwidth efficient and high anti-noise performance, PSK（Phase Shift Keying） modulation technology has a very wide application in telemetry systems with a very high rate bits. To solve the Doppler frequency offset effect of a telemetry system with PSK modulation in a high speed movement, the estimation and correction of Doppler frequency offset in telemetry systems is proposed in this paper. The effect of Doppler frequency offset to PSK modulation mode is introduced firstly. The common PSK modes, QPSK and 8PSK, are studied in detail secondly. At last, simulation results of a receiver in a telemetry system with a high speed moving state indicate the algorithm proposed is feasible.

关 键 词：高速移动 多普勒频移 相移键控 遥测系统 

分 类 号：TN911[电子电信—通信与信息系统]