Abstract:

A composite algorithm of velocity measurement is proposed by using the specific waveform of the up-down stepped frequency signal. The main idea is that the algorithm skillfully uses the correlation of echo from different aspects, and then acquires the radial velocity from the phase or range result related with velocity. The proposed algorithm not only exploits the information of the range shift between two frames, but also takes advantage of the feature that the moving target has different coupled timeshift under the condition of up-down stepped frequency signal.  The result shows that the proposed algorithm can realize the accuracy measurement of high speed moving target, and fulfill the purpose of the micromotion measurement, which is verified by simulation.