Title :
An Instantaneous-Frequency Filtering Technique for High-Frequency Radar Oceanography
Author :
Middleditch, A. ; Wyatt, L.R.
Author_Institution :
Dept. of Appl. Math., Univ. of Sheffield
Abstract :
High-frequency (HF) radar systems are remote sensing tools that can be used to measure oceanographic parameters. Problems can occur when using the conventional periodogram (PG) method for computing power spectral estimates from backscattered radar signals. Temporal and spatial inhomogeneities within the radar measurement region can cause distortion in the spectra. This paper describes an instantaneous-frequency (IF) filtering technique that has been developed to measure the first-order modulation contained within the radar signal. Successful removal of this modulation is shown to yield an increased quality and quantity of ocean measurements
Keywords :
filtering theory; geophysical signal processing; modulation; oceanographic techniques; radar signal processing; remote sensing by radar; HF radar systems; first-order modulation; high-frequency radar oceanography; high-frequency radar systems; instantaneous-frequency filtering technique; ocean measurements; radar signal; Distortion measurement; Doppler radar; Filtering; Hafnium; Oceans; Radar measurements; Radar remote sensing; Sea measurements; Sea surface; Surface waves; High-frequency (HF) radar; instantaneous frequency (IF); ocean wave measurement; surface current;
Journal_Title :
Oceanic Engineering, IEEE Journal of
DOI :
10.1109/JOE.2006.886083
