Airship conformal sparse array radar imaging

Based on the stratospheric airship platform,the problems about stationary targets imaging and moving targets detection using conformal sparse array are investigated.A distribution scheme of the conformal sparse array is proposed for the airship with the trilobal roseline profile model.The real aperture imaging method is adopted by the radar.All the subarrays transmit multiple-pulse orthogonal frequency division signals simultaneously.The echo signals of multiple-input and multiple-output are used to achieve stationary targets imaging by the back projection(BP)algorithm for each sub band signal respectively.Then all these results are coherently accumulated to improve the range resolution.The multiple-pulse signals of single-input and multiple-output are transformed into the range-Doppler domain to achieve clutter suppression.The compressed sensing(CS)method is used to reconstruct the moving targets image in two-dimension for each sub band signal respectively.Similarly, all these results are incoherently accumulated to improve the SNR of moving targets detection.Simulation results demonstrate the validity of the method proposed in this article.