应答机转发测距调制度的特性分析与测试方法研究  

The Characteristics Analysis of Transponder Turnaround Ranging Modulation Index and Research on Its Measuring Method

作　　者：朱智勇[1] 李海涛[1] 樊敏[1] 

机构地区：[1]北京跟踪与通信技术研究所

出　　处：《飞行器测控学报》2010年第6期7-12,共6页Journal of Spacecraft TT&C Technology

摘　　要：针对低电平条件下应答机下行转发测距调制度下降这一现象,本文首先对应答机的不同转发测距控制模式进行了理论分析,找到了调制度的主要制约因素。比较不同控制模式的特点和调制效率,得到最佳的控制模式。针对转发调制度会随着输入信噪比的不同而变化的特性,提出了新的转发调制度测试思路,通过仿真分析找到了合理的测量点。文中的计算及分析结果对于应答机转发测距调制度指标确定和测试具有一定的参考价值。This paper analyzes theoretically the different turnaround ranging control modes,and finds out the principal restrict factors according to the descent of transponder downlink turnaround ranging modulation index under conditions of low level.The optimal control mode has been achieved by comparison of the characteristics and modulation efficiency of different control methods.It puts forward a new idea for the test of turnaround modulation index aiming at the characteristics that varies with the different input SNR,and finds out the reasonable measuring point through the simulation analysis.The results have a certain reference to the determination and measurement of the transponder turnaround ranging modulation index.

关 键 词：应答机 测距 调制度 测量方法 

分 类 号：V556[航空宇航科学与技术—人机与环境工程]