A NEW ALGORITHM FOR THE FORMATION OF ISAR IMAGES

A new technique for implementing the Enhanced Image Processing (EIP) a lgorithm for the formation of Inverse Synthetic Aperture radar (ISAR) images is presented The EIP algorithm is required when, during the for mation of an image, scattering centers on a target move out of range a nd/or Doppler resolution cells. This phenomenon is common for high res olution imagery of practical-sized targets. The method presented is ba sed entirely on the fast Fourier transform (FFT) and therefore does no t require the interpolation schemes that are prevalent in the standard EIP implementation. A brief review of the theory of radar imaging is presented to establish the notation for the work. Following the presen tation of the mew algorithm a simple example is given to demonstrate t he effectiveness or the new technique. In addition work is presented t hat demonstrates the processing required to reduce the sidelobes in im agery generated by the EIP technique.