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The linear frequency modulated (LFM) frequency agile radar (FAR) cansynthesize a wide signal bandwidth through coherent processing while keepingthe bandwidth of each pulse narrow. In this way, high range resolution profiles(HRRP) can be obtained without increasing the hardware system cost.Furthermore, the agility provides improved both robustness to jamming andspectrum efficiency. Motivated by the Newtonalized orthogonal matching pursuit(NOMP) for line spectral estimation problem, the NOMP for the FAR radar termedas NOMP-FAR is designed to process each coarse range bin to extract the HRRPand velocities of multiple targets, including the guide for determining theoversampling factor and the stopping criterion. In addition, it is shown thatthe target will cause false alarm in the nearby coarse range bins, apostprocessing algorithm is then proposed to suppress the ghost targets.Numerical simulations are conducted to demonstrate the effectiveness ofNOMP-FAR.

Newtonalized Orthogonal Matching Pursuit for Linear Frequency Modulated Pulse Frequency Agile Radar