edef1dbed3
Created checkCounterSamples.m to validate sample continuity, counter wraps, and frame index progression. Verified counter bypass, sine bypass, and channelizer modes up to nFrames=1024 across 10 DPWs on ZCU111.
84 lines
2.2 KiB
Matlab
84 lines
2.2 KiB
Matlab
%% =========================================================
|
|
% Data
|
|
% =========================================================
|
|
X = single(raw_DPW.Data);
|
|
X = X(:,:,2:end); % first DPW useless (zeroed)
|
|
|
|
%% =========================================================
|
|
% Parameters
|
|
% =========================================================
|
|
Fs = 512e6; % Sampling rate (Hz)
|
|
N = 512; % Frame size
|
|
|
|
% Your data variable (rename if needed)
|
|
% Expected size: [512 x 4 x 8]
|
|
% X(frameSamples, frameIndex, timeIndex)
|
|
% Example: X = your_workspace_variable;
|
|
|
|
[nSamples, nFrames, nTime] = size(X);
|
|
|
|
%% =========================================================
|
|
% FFT Computation
|
|
% =========================================================
|
|
FFT_all = zeros(N, nFrames*nTime);
|
|
|
|
idx = 1;
|
|
|
|
for t = 1:nTime
|
|
for f = 1:nFrames
|
|
|
|
x = X(:, f, t);
|
|
|
|
% Optional window (uncomment if needed)
|
|
% w = hann(N);
|
|
% x = x .* w;
|
|
|
|
Xf = fftshift(fft(x));
|
|
FFT_all(:, idx) = abs(Xf);
|
|
|
|
idx = idx + 1;
|
|
end
|
|
end
|
|
|
|
%% =========================================================
|
|
% Axes
|
|
% =========================================================
|
|
f_axis = (-N/2 : N/2-1) * (Fs/N) / 1e6; % MHz
|
|
t_axis = 1:(nFrames*nTime); % frame index
|
|
|
|
%% =========================================================
|
|
% Spectrogram-like view (BEST)
|
|
% =========================================================
|
|
figure;
|
|
surf(t_axis, f_axis, 20*log10(FFT_all + 1e-12), 'EdgeColor', 'none');
|
|
view(2);
|
|
axis tight;
|
|
|
|
xlabel('Frame index');
|
|
ylabel('Frequency (MHz)');
|
|
title('FFT over time (per frame)');
|
|
colorbar;
|
|
|
|
%% =========================================================
|
|
% 3D Visualization (optional)
|
|
% =========================================================
|
|
figure;
|
|
surf(t_axis, f_axis, FFT_all, 'EdgeColor', 'none');
|
|
xlabel('Frame index');
|
|
ylabel('Frequency (MHz)');
|
|
zlabel('Magnitude');
|
|
title('3D FFT evolution');
|
|
|
|
%% =========================================================
|
|
% Single frame debug (optional)
|
|
% =========================================================
|
|
figure;
|
|
x_dbg = X(:,end,end);
|
|
Xf_dbg = fftshift(fft(x_dbg));
|
|
|
|
plot(f_axis, 20*log10(abs(Xf_dbg)+1e-12));
|
|
grid on;
|
|
|
|
xlabel('Frequency (MHz)');
|
|
ylabel('Magnitude (dB)');
|
|
title('Single Frame FFT'); |