卫星信标谐波干扰对跟踪接收机信噪比的影响分析  

Influence of Harmonic Interference from Satellite Beacons on Signal-to-noise Ratio of Tracking Receiver

作　　者：刘晨阳 罗岩[1] 李兵[1] LIU Chenyang;LUO Yan;LI Bing(China Satellite Maritime Tracking and Control Department, Jiangyin 214431 , China)

机构地区：[1]中国卫星海上测控部,江苏江阴214431

出　　处：《现代雷达》2019年第4期70-74,共5页Modern Radar

摘　　要：船载卫通站在跟踪圆极化星时,通过频谱监视单元,观察到信标信号附近定时出现干扰谐波,且此时跟踪接收机信噪比下降。针对该问题,提出一种信标频谱分析的方法,从原理上分析干扰谐波对接收机误差电压和信噪比的影响。结果表明:若干扰谐波满足特定频率时会影响误差电压的解调和信噪比值。结合该结论提出方案,降低了干扰对天线跟踪的影响,确保通信业务的正常。When the ship-borne satellite station tracks the circular polarized star, the interference harmonics near the beacon signal are observed through the spectrum monitoring unit, and the signal-to-noise ratio of the tracking receiver decreases at this time. To solve this problem, a beacon spectrum analysis method is proposed to analyze the influence of interference harmonics on receiver error voltage and signal-to-noise ratio in principle. The analysis results show that the demodulation and signal-to-noise ratio of error voltage will be affected when some interference harmonics satisfy a specific frequency. Combined with this conclusion, a scheme is proposed to reduce the influence of interference on antenna tracking and ensure the normal communication service.

关 键 词：跟踪接收机 信标频谱 干扰谐波 信噪比 误差电压 

分 类 号：TN958[电子电信—信号与信息处理]