This file contains information on the MATLAB codes for the book:   Synthetic Aperture Radar Signal Processing with MATLAB Codes   (Wiley, 1999)For questions regarding these files, please contact   Mehrdad Soumekh   201 Bell Hall   Department of Electrical Engineering   State University of New York at Buffalo   Amherst, NY 14260   Telephone:     (716) 645-2422, extension 2138   Telefax:       (716) 645-3656   Email:         msoum@eng.buffalo.edu   Web Address:   http://www.acsu.buffalo.edu/~msoumThese files are copyrighted property of the author. A user may modify thesefiles so long as he acknowledges the source; these files are not for sale.These M-files are User Contributed Routines which are being redistributedby The MathWorks, upon request, on an "as is" basis.  A User ContributedRoutine is not a product of The MathWorks, Inc. and The MathWorks assumesno responsibility for any errors that may exist in these routines.DESCRIPTION OF THE FILES:1. Utility FFT Codes: ftx.m fty.m fty.m ifty.m   These four codes are forward and inverse FFT routines for a two-dimensional   signal, e.g., f(x,y) and its Fourier transform F(k_x,k_y):     x or k_x: first variable;     y or k_y: second variable.   The routines can be used for any two-dimensional signal, e.g., s(t,u).   In this case, t is the first variable, and u is the second variable.   For two-dimensional FFT, use ftx(fty(array).2. Chapter 1 Code: range.m   This code is for simulation and reconstruction in a one-dimensional range   imaging system with a pulsed chirp signal.3. Chapter 2 Code: crange.m   This code is for simulation and reconstruction in a one-dimensional   cross-range imaging system.4. Chapter 3 Code: rad_pat.m   This code provides the transmit/receive radiation patterns of a planar   or parabolic radar, and their Fourier (Doppler) spectra.5. Chapter 5 Code: spotlight.m   This code simulates a spotlight SAR database. Four reconstruction   algorithms (spatial frequency domain interpolation, range stacking, time   domain correlation, and backprojection) are provided.6. Chapter 6 Code: stripmap.m   This code simulates a stripmap SAR database. Four reconstruction   algorithms (spatial frequency domain interpolation, range stacking, time   domain correlation, and backprojection) are provided.   NOTE: The spotlight SAR and stripmap SAR codes were designed to have         common features in their reconstruction section; this was done         to create a common basis for the two SAR systems that was more         comprehendable to the user. The user should customize and         optimize these codes depending on his application; see the discussion         on the MATLAB codes at the end of Chapters 5 and 6. For instance,         one should incorporate the more restrictive support band of the         target spectrum in the (k_x,k_y) domain that depends on the         modality of the SAR system (i.e., spotlight or stripmap). Also,         for the "wide-bandwidth" SAR systems, convert the "narrow-bandwidth"         digital spotlighting (via polar format reconstruction) into its         wide-bandwidth version. 7. Chapter 8 Codes: sig_sub_a.m sig_sub_b.m   The first code, sig_sub_a.m, performs block-based signal subspace processing   for detecting change or target registration using a simulated database.   The second code, sig_sub_b.m, performs overlapping block-based signal   subspace processing for motion tracking using a simulated database.