Enhanced GPR Signal for Layered Media Time-Delay Estimation in Low-SNR Scenario
Résumé
In this letter, a new method is proposed to enhance the ground-penetrating radar (GPR) signal for time-delay estimation in a low signal-to-noise ratio. It is based on a subspace method and a clustering technique. The proposed method makes it possible to improve the estimation accuracy in a noisy context. It is used with a compressive sensing method to estimate the time delay of layered media backscattered echoes coming from the GPR signal. Several simulations and an experiment are presented to show the effectiveness of signal enhancement
Mots clés
Media
low signal-to-noise ratio
remote sensing by radar
geophysical signal processing
Estimation
eigenvalues and eigenfunctions
GPR signal enhancement
signal enhancement
Signal to noise ratio
subspace method
time-delay estimation (TDE)
clustering technique
compressed sensing
Compressive sensing (CS)
compressive sensing method
layered-media time-delay estimation
layered-media backscattered echo
ground penetrating radar (GPR)
ground penetrating radar
Noise measurement