The theory of SZ phase encoding correcting range ambiguity algorithm is analyzed. Based on the Matlab radar signal simulation platform, the meteorological echo signals are simulated with different parameters. Furthermore, the range ambiguity correcting is performed in frequency domain with the improved SZ method. It is indicated that SZ phase encoding algorithm is capable to restore the parameters of overlapped echoes and estimate the average velocity accurately. It is proved to be applicable in actual observations. This algorithm shows better effect in restoring the weak echo spectrum matrix when the echo power ratio is in a certain range. The error of the estimated second echo spectrum matrix increases with the power ratio.
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