Key Technologies of the USB TT&C System for Manned Space Flight
Liu Jiaxing · Journal of Astronautics · 2005
This paper summarizes the key technologies of the Unified Sband(USB) TTC communication system for manned space flight,including integration,high reliability,high precision orbit determination,anticombination interference,digitalization,high dynamic control,fast acquisition of target,polarization diversity reception etc..It also proposes solutions to implement these technologies,including design of unified carrier signal,``Fiveinone'' Digital carrier PLL,digital measurement of range and rage rate,scan slope decision method,high near modulation/demodulation,FM polarization synthesization tracking etc..After having been demonstrated in China manned space engineering,the USB TTC communication system has succeeded,its overall performance reached the advanced world level of the time.