Читать книгу Inverse Synthetic Aperture Radar Imaging With MATLAB Algorithms - Caner Ozdemir - Страница 49

%-------------------------------------------------------- % This code can be used to generate Figure 1.5 %-------------------------------------------------------- % This file requires the following files to be present in the same % directory: % % tot30.mat % stft.m clear close all load tot30; % load the measured scattered field % DEFINITION OF PARAMETERS f = linspace(6,18,251)*1e9; %Form frequency vector BW = 6e9; % Select the frequency window size d = 2e-9; %Select the time delay % DISPLAY THE FIELD IN JFT PLANE [B,T,F] = stft(tot30,f,BW,50,d); xlabel('--->Time (nsec)'); ylabel('--> Freq. (GHz)'); cc = colorbar; tt = title(cc,'dBsm'); tt.Position = [ 8 -15 0 ]; colormap(1-gray) set(gca,'FontName', 'Arial', 'FontSize',12,'FontWeight','Bold'); axis tight; xlabel('time, ns'); ylabel('Frequency, GHz');