Coherent accumulation range defuzzification algorithm based on pseudo-code inter-pulse phase modulation

Ground-based space target pulse measurement radar searches and captures medium-And high-orbit space targets, and there are some problems in target radial range measurement, such as range ambiguity and low echo signal-To-noise ratio. In order to solve the above problems, a coherent accumulation range deblurring method based on pseudo code pulse phase modulation is proposed. This method makes full use of the good autocorrelation of m-sequence. Firstly, the transmitted pulse is modulated by m-sequence pseudo-code, and then the collected echo signal is compensated by pseudo-code phase modulation and space target motion compensation. When the phase compensation reference signal constructed by m-sequence is completely matched with the received phase modulated echo signal of m-sequence, the space target motion compensation and coherent accumulation are carried out to realize the convergence of signal energy. In order to determine the range ambiguity, all possible ambiguities are processed by coherent accumulation of sliding window. By comparing the accumulated signal energy in the accumulated sliding window, the cumulative sliding window movement number corresponding to the maximum energy is obtained, and the target range ambiguity can be solved.