An improved time-frequency distribution method for ionosphere phase decontamination

Ionosphere phase contamination causes spectrum broadening of the OTHR ground Clutter and Sea Clutter, restricting the detection of slowly moving target on the sea seriously. In this article, a new method with high time-frequency cohesive and low cross item is put forward. The method is used to solve the problem of ionosphere phase contamination by Time-Frequency Distribution and it succeeded in solving the low time-frequency cohesive of STFT method and the high cross item of WVD method, improving the phase pollution suppression precision dramatically.