1 files changed, 74 insertions, 0 deletions
diff --git a/gr-digital/examples/ofdm/plot_ofdm.m b/gr-digital/examples/ofdm/plot_ofdm.m
new file mode 100755
index 000000000..2a649b5f5
--- /dev/null
+++ b/gr-digital/examples/ofdm/plot_ofdm.m
@@ -0,0 +1,74 @@
+function plot_ofdm(fft_size, occ_tones)
+
+ofdm = read_complex_binary('ofdm_frame_acq_c.dat');
+ofdm_split = split_vect(ofdm, occ_tones);
+
+ofdm_derot = read_complex_binary('ofdm_frame_sink_c.dat');
+ofdm_derot_split = split_vect(ofdm_derot, occ_tones);
+
+fftc = read_complex_binary('fft_out_c.dat');
+fftc_split = split_vect(fftc, fft_size);
+
+size(ofdm_split)
+size(ofdm_derot_split)
+disp "DEROTATED SPLIT"
+ofdm_derot(1:100)
+
+
+figure(1)
+#set(gcf, 'Position', [50 50 1000 600]);
+
+a = size(ofdm_split);
+if nargin == 3
+    maxcount = count;
+    if maxcount > a(1)
+        error('plot_ofdm:tolong', 'Requested count size exceeds size of vectors');
+    end
+else
+    maxcount = a(1);
+end
+
+for i = 1:size(ofdm_split)[0]
+    x = ofdm_split(i,:);
+    y = fftc_split(i+1,:);
+    
+    subplot(2,2,1);
+    plot(real(x), imag(x), 'bo');
+    #set(gca, 'FontSize', 30, 'FontWeight', 'Bold');
+    axis([-1.5, 1.5, -1.5, 1.5])
+    #title('I&Q Constellation', 'FontSize', 36);
+    #xlabel('Inphase', 'FontSize', 32);
+    #ylabel('Quadrature', 'FontSize', 32);
+    
+    subplot(2,2,3);
+    plot(angle(x*j), 'bo');
+    #set(gca, 'FontSize', 30, 'FontWeight', 'Bold');
+    axis([0, occ_tones, -3.5, 3.5])
+    #title('Equalized Symbol Angle', 'FontSize', 36);
+    #xlabel('Bin Number (Occ. Tones)', 'FontSize', 32);
+    #ylabel('Symbol Angle', 'FontSize', 32);
+    
+    subplot(2,2,2);
+    plot(angle(y*j), 'bo');
+    #set(gca, 'FontSize', 30, 'FontWeight', 'Bold');
+    axis([0, fft_size, -3.5, 3.5]) 
+    #title('Unequalized Symbol Angle', 'FontSize', 36);
+    #xlabel('Bin Number (FFT Size)', 'FontSize', 32);
+    #ylabel('Symbol Angle', 'FontSize', 32);
+    
+    Y = 20*log10(abs(y) ./ max(abs(y)));
+    subplot(2,2,4);
+    plot(Y, 'b-');
+    #set(gca, 'FontSize', 30, 'FontWeight', 'Bold');
+    axis([0, fft_size, -50, 1]);
+    #title('Frequency Domain of Unequalized Rx', 'FontSize', 36);
+    #xlabel('Bin Number (FFT Size)', 'FontSize', 32);
+    #ylabel('Power (dB)', 'FontSize', 32);
+    
+    #N = 20*log10(var(abs(x)-1));
+    
+    disp(sprintf('Symbol Number: %d\n', i))
+    #disp(sprintf('\tFreq Error: %f\n', anglesh_pn(1+(i-1)*fft_size)))
+    pause
+
+end