High resolution imaging waveform design based on weighted cycle algorithm
To achieve high-resolution imaging of objects of interest,MIMO-SAS(Multiple Input Multiple output Syn-thetic Aperture Sonar)generally uses long transmitted signals to irradiate targets.However,too long transmitted signals will result in aliasing of the echoes of short-range tagets and long range targets,causing range ambiguity and affecting the ima-ging quality of tagets.In order to suppress range-derection ambiguity,the usual method is to reduce the pulse repetition rate.However,too low pulse repetition rate will lead to azimuth under sampling in MIMO-SAS,resulting in mutual aliasing of echo spectrum.In addition,there will be Shanlob in azimuth in Sonar imaging,making it difficult to effectively separate target echo.To slove this problem,a transmission waveform design method based on weighted cycle algorithm is proposed in this paper can suppress echo asiasing and effectively improve the imaging quality of Sonar targets without changing the pulse re-petition rate.
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