| 卫星信标谐波干扰对跟踪接收机信噪比的影响分析 |
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| 引用本文： | 刘晨阳,罗岩,李兵.卫星信标谐波干扰对跟踪接收机信噪比的影响分析[J].现代雷达,2019,41(4):70-74. |
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| 作者姓名： | 刘晨阳 罗岩 李兵 |
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| 作者单位： | 中国卫星海上测控部,中国卫星海上测控部,中国卫星海上测控部 |
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| 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。
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| 关 键 词： | 跟踪接收机 信标频谱 干扰谐波 信噪比 误差电压 |
Influence of Harmonic Interference from Satellite Beacons on Signal-to-noise Ratio of Tracking Receiver |
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| LIU Chenyang,LUO Yan and LI Bing.Influence of Harmonic Interference from Satellite Beacons on Signal-to-noise Ratio of Tracking Receiver[J].Modern Radar,2019,41(4):70-74. |
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| Authors: | LIU Chenyang LUO Yan and LI Bing |
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| Affiliation: | China Satellite Maritime Tracking and Control Department,China Satellite Maritime Tracking and Control Department and China Satellite Maritime Tracking and Control Department |
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| Abstract: | 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. |
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| Keywords: | tracking receiver beacon spectrum interference harmonics signal-to-noise ratio error voltage |
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