本振信号相位噪声对星载扩频应答机影响研究  

Research on impact of phase noise of local oscillator signal on spaceborne spread spectrum transponder

作　　者：何钐 王淦[1] 窦骄[1] 宁金枝 HE Shan;WANG Gan;DOU Jiao;NING Jinzhi(DFH Satellite Co.,Ltd,Beijing 100094,China)

机构地区：[1]航天东方红卫星有限公司

出　　处：《遥测遥控》2019年第5期28-33,共6页Journal of Telemetry,Tracking and Command

基　　金：国家自然科学基金资助项目(11773004)

摘　　要：扩频微波统一测控系统已广泛应用于我国航天测控领域,其中扩频应答机是卫星测控系统的重要组成设备。由于扩频应答机中的本振电路需要为其中的数字基带、接收通道、发射通道提供高稳本振信号,因此扩频应答机中本振信号的好坏,尤其是其相位噪声特性的好坏,将直接影响扩频应答机的功能和性能。通过对本振信号相位噪声特性的变化对扩频应答机性能的影响进行理论和仿真分析,以及通过模拟本振信号相位噪声干扰试验验证,表明相位噪声特性变化会对扩频应答机的遥控遥测造成影响,相位噪声越大,遥控遥测通道的误码率会越高,严重时会导致上下行遥控遥测通道失锁。The spread spectrum microwave unified TT&C system is widely used in our country space TT&C field,the spread spectrum transponder is an important component of the satellite TT&C system.Since the local oscillator circuit in the spread spectrum transponder needs to provide a high-stability local oscillator signal for the digital baseband,the receiving channel,and the transmitting channel,the local oscillator signal is good or bad,especially its phase noise,will directly affect the function and performance of the spread spectrum transponder.In this paper,the theoretical and simulation analysis of the influence of the phase noise characteristics of the local oscillator signal on the performance of the spread spectrum transponder is carried out,and the phase noise interference test of the local oscillator signal is verified.It shows that the phase noise characteristic change will influence the TT&C system,the greater the phase noise,the higher the bit error rate of the TT&C channel,which will cause the uplink and downlink TT&C channels to lose lock.

关 键 词：本振信号 相位噪声 扩频应答机 卫星 测控系统 误码率 

分 类 号：TN911.4[电子电信—通信与信息系统]