Microwave Unified Monitoring And Control System, The Carrier Capture Anti-wrong Lock Technology Research

The problem of error lock of carrier frequency acquisition being in China Unified Microwave System . With the need of TT&C technology development of China .especially the requirement of "Land Moon Mission" and Deep Space Explore Mission , we need to resolve this technical problem in China Unified Microwave System as soon as possible .Especially the probability of error lock of carrier frequency acquisition can get to 80-90% .when the modulation index of slave carrier being great.The purpose of the study of this project is to resolve error lock of carrier frequency acquisition , especially when the modulation index of slave carrier is great. So it can improve the capability of carrier frequency acquisition of a few TT&C facility in China TT&C net greatly , and also can improve the support to some low orbit spacecraft and others mission that has some special demand to modulation index of slave carrier .Conclude and analyze the causation of error lock of carrier frequency acquisition . Design the mode and the arithmetic of error lock prevention based on DSP . The idea of system design is digital frequency field process method of intermediate frequency signal. First we study the characteristic of frequency field and time field of carrier frequency. Second study the digital frequency field process method in DSP unit .And we make a simulation using Matlab software in computer system to simulate the carrier frequency acquisition . But it also need to be used in TT&C facility to prove its efficiency.