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Pulse finding for multiple SNR

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Eric Teunis de Boone 2023-04-24 18:37:13 +02:00
parent 81b3502de5
commit a011aee28e
1 changed files with 241 additions and 211 deletions
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46
simulations/11_pulsed_timing.py
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@ -136,9 +136,9 @@ if __name__ == "__main__":
bp_freq = (30e-3, 80e-3) # GHz bp_freq = (30e-3, 80e-3) # GHz
template_dt = 5e-2 # ns template_dt = 5e-2 # ns
template_length = 500 # ns template_length = 500 # ns
noise_sigma_factor = 1e-1 # amplitude factor
N_residuals = 50*3 if len(sys.argv) < 2 else int(sys.argv[1]) N_residuals = 50*3 if len(sys.argv) < 2 else int(sys.argv[1])
noise_factors = [1e-4, 3e-4, 1e-3, 3e-3, 1e-2, 3e-2, 1e-1, 3e-1, 5e-1, 7e-1] # amplitude factor
antenna_dt = 2 # ns antenna_dt = 2 # ns
antenna_timelength = 2048 # ns antenna_timelength = 2048 # ns
@ -176,6 +176,9 @@ if __name__ == "__main__":
if True: if True:
plt.close(fig) plt.close(fig)
time_accuracies = np.zeros(len(noise_factors))
for k, noise_sigma_factor in tqdm(enumerate(noise_factors)):
print() #separating tqdm
# #
# Find difference between true and templated times # Find difference between true and templated times
# #
@ -193,6 +196,8 @@ if __name__ == "__main__":
antenna.peak_sample = antenna_peak_sample antenna.peak_sample = antenna_peak_sample
antenna.peak_time = antenna.dt * antenna.peak_sample antenna.peak_time = antenna.dt * antenna.peak_sample
antenna.signal = antenna_bp(antenna.signal, *bp_freq, antenna.dt) antenna.signal = antenna_bp(antenna.signal, *bp_freq, antenna.dt)
print(f"Antenna Peak Time: {antenna.peak_time}")
print(f"Antenna Peak Sample: {antenna.peak_sample}")
else: # Sample the template at some offset else: # Sample the template at some offset
antenna.peak_time = antenna_timelength * ((0.8 - 0.2) *rng.random(1) + 0.2) antenna.peak_time = antenna_timelength * ((0.8 - 0.2) *rng.random(1) + 0.2)
@ -204,11 +209,8 @@ if __name__ == "__main__":
antenna.peak_sample = antenna.peak_time/antenna.dt antenna.peak_sample = antenna.peak_time/antenna.dt
antenna_true_signal = antenna.signal antenna_true_signal = antenna.signal
true_time_offset = antenna.peak_time - template.peak_time
if do_plots: true_time_offset = antenna.peak_time - template.peak_time
print(f"Antenna Peak Time: {antenna.peak_time}")
print(f"Antenna Peak Sample: {antenna.peak_sample}")
if False: # flip polarisation if False: # flip polarisation
antenna.signal *= -1 antenna.signal *= -1
@ -251,7 +253,7 @@ if __name__ == "__main__":
# restore # restore
axs[0].set_xlim(*old_xlims) axs[0].set_xlim(*old_xlims)
if False: if True:
plt.close(fig) plt.close(fig)
axs2 = None axs2 = None
@ -365,11 +367,13 @@ if __name__ == "__main__":
fig.tight_layout() fig.tight_layout()
fig.savefig('figures/11_corrs.pdf') fig.savefig('figures/11_corrs.pdf')
if False: if True:
plt.close(fig) plt.close(fig)
print()# separating tqdm
# Make a plot of the time residuals # Make a plot of the time residuals
if len(time_residuals) > 1: if len(time_residuals) > 1:
time_accuracies[k] = np.std(time_residuals)
hist_kwargs = dict(bins='sqrt', density=False, alpha=0.8, histtype='step') hist_kwargs = dict(bins='sqrt', density=False, alpha=0.8, histtype='step')
fig, ax = plt.subplots() fig, ax = plt.subplots()
@ -424,6 +428,32 @@ if __name__ == "__main__":
ax.text( *(0.02, 0.95), text_str, fontsize=12, ha='left', va='top', transform=ax.transAxes) ax.text( *(0.02, 0.95), text_str, fontsize=12, ha='left', va='top', transform=ax.transAxes)
fig.savefig("figures/11_time_residual_hist.pdf") fig.savefig("figures/11_time_residual_hist_{noise_sigma_factor: .1e}.pdf")
if True:
plt.close(fig)
# SNR time accuracy plot
if True:
fig, ax = plt.subplots()
ax.set_title("Template matching SNR vs time accuracy")
ax.set_xlabel("Signal to Noise Factor")
ax.set_ylabel("Time Accuracy [ns]")
if True:
ax.set_xscale('log')
ax.set_yscale('log')
# plot the values
ax.plot(1/np.asarray(noise_factors), time_accuracies, ls='none', marker='o')
# Set horizontal line at 1 ns
if True:
ax.axhline(1, ls='--', alpha=0.8, color='g')
ax.grid()
fig.tight_layout()
fig.savefig("figures/11_time_res_vs_snr.pdf")
plt.show() plt.show()