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

Volume

31

Issue

4

fYear

2006

Firstpage

797

Lastpage

803

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;

fLanguage

English

Journal_Title

Oceanic Engineering, IEEE Journal of

Publisher

ieee

ISSN

0364-9059

Type

jour

DOI

10.1109/JOE.2006.886083

Filename

4089073