Abstract: On the basis of the repeat mode of equivalent lowpass of USB transponder and signals in the given frequency range, this paper introduces the concept of equivalent of uplink modulation index and presents an optimization method to distribute the power of a unified carrier TTC system, namely the optimal distribution of the uplink modulation index. This optimization method of signal index rapidly reduces the requirement of satellite resourses.

Key words: lowpass-filter, unified carrier TTC system, equivalent of uplink modulation index

摘要： 针对USB应答机的等效低通滤波器转发方式和给定频域的调制信号，详细提出了一种统一载波测控系统的功率最佳分配的方法，即上下行调制度的最佳选择，并引入了等效上行调制度的概念。这种调制度的最佳选择，在卫星实际工程应用中，降低了对卫星的资源需求，在下行余量紧张的情况下增大了遥测信号下行余量。

关键词: 低通滤波器, 统一载波测控系统, 等效上行调制度