Study on Imaging Algorithm of Missile-Borne MMW SAR

Active Millimeter Waves (MMW) guidance is one of the important aspects in radar precision guidance technique. With the improvement of resolution in MMW band, guidance radar can gain shape and structure information related to target property by means of image target, then fulfill target recognition and selection of attacking points. Compared with the tradition synthesis aperture radar (SAR), the missile borne SAR has important characteristics including high flight speed, non-straight movement with non-constant velocity and big squint angle, which brings forward a crucial great of requirements for real time performance and precision of the motion compensation. The modified extended chirp scaling algorithm is designed for high squint missile borne SAR raw data processing to accommodate the condition of movements and short wave wavelength, which according to signal mode of the relative motion of the missile and aircraft target. In the end the validity of the algorithm is demonstrated by the simulations.