中国空间科学技术

中国空间科学技术

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同信道干扰对载波环和遥测分系统的影响

许鼎阜;张波;   

  1. 洛阳跟踪测量通信研究所,洛阳跟踪测量通信研究所,
  • 发布日期:1990-06-25

EFFECT OF CO-CHANNEL INTERFERENCE ON A CARRIER TRACKING LOOP AND TELEMETRY SUBSYSTEM

Xu Dingfu Zhang Bo (Luoyang Institute of Tracking Telemetry and Telecommunication)   

  • Online:1990-06-25

摘要： 文中讨论了星地链路中同信道干扰对地面TT&C站的影响;分析了干扰对载波跟踪环路的影响,确定了载波环保持锁定的临界条件,重点分析了干扰对遥测解调分系统的影响。干扰通过两个途径影响误码率:一是通过载波恢复环路,造成参考相位抖动,间接影响误码率;二是直接进入相干检测设备,直接影响误码率。这些影响的结果可用同等误码率下输入信噪比E_b/N_0的损耗表示。

关键词: 同波道干扰, 载波干扰, 遥测系统, 加速度计, 性能分析

Abstract: This paper discribes the effect of co-channel interference on the ground TT&C station between satellite-ground links.The effect of interference on a Carrier-to-Tracking Loop (CTL) is analysed, and the critical value is determined under the tracking condition of CTL.The analysis of the effect of interference on a telemetry demodulation subsystem is emphasized. The interference has an effect on the Bit-Error-Rate (BER) by two ways. On the one hand, the reference phase jitter caused by a carrier recovery loop will have an indirect effect on BER. On the other hand, the interference introduced directly into a coherent detection device will directiy give raise to increase BER.The results of the effects can be expressed in terms of the loss of input Signal-to-Noise ratio E_b/N_0 at the same BER.