Capture Algorithm Simulation And Design, Based On Deep-space Frequency Of The Two-dimensional Partition

In the missions of deep space research, the signal received by Deep Space Station on the earth includes not only high Doppler frequency shift, but also high rate of variation. For the reason that the distance is very big in the deep space mission, the signal received also weak. What mentioned above is the major problem in the receiving of deep space signal. The goal of this article is how to resolve the problem of frequency estimation, which is the high dynamic weak signal.This article firstly analysis the character of deep space communication and the exist algorithm of deep space frequency estimation. After that this article introduce one algorithm which is based on two-dimension divided to estimate the frequency of deep space signals. Use the thinking of decimation and interpolation to partition the frequency and frequency variation, dividing the frequency of signal into many parts. In each of these parts, the Doppler frequency shift and frequency variation is small, so we can use a short FFT to estimation each frequency, this method also lower the resource of hardware,number of calculate,memories etc.And also introduce a frequency tracking system structure, which is based on the two-dimension partition. In this structure, 300 passages were designed to estimate the frequency at the same time. Every passage is same. At the end of structure, a state machine was designed to manage these passages. Analysis the theory of each model, after that, the problem of reality application is analyzed, and the most suit structure is got.At last, this article use this algorithm to simulate, and design the model of a simple streams, through the progress of design, this article analysis each model, and use many method to advance the performance. For the reason of time, we didn't simulate the whole system, but the software simulation implies that this algorithm is useful.