Radio frequency interference cancellation for sea-state remote sensing by high-frequency radar

Wang, W., and Wyatt, L.R. (2011) Radio frequency interference cancellation for sea-state remote sensing by high-frequency radar. IET Radar, Sonar and Navigation, 5 (4). pp. 405-415.

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Abstract

High-frequency surface wave radar (HFSWR) has been widely adopted as a useful remote-sensing tool for sea-state monitoring. There are limitations to the performance because of various unwanted clutters and interferences that contaminate radar signals. Among all types of unwanted signals, radio frequency interference (RFI) is dominant since the frequency bands 3-30 MHz, the operation range of HFSWR, are shared by many radio services. If RFI occupies the areas in the Doppler spectrum that are essential for the estimation of oceanographic parameters, for example, wind speed, current speed, wave height etc., it will significantly reduce the quality of the data. The characteristics of RFI in time, space and Doppler domains are analysed for sea-state monitoring, and a robust and general signal processing method consisting of image recognition, segmentation processing and subspace projection for cancellation of RFI is proposed. The effectiveness of this approach is validated using data obtained with the Pisces HF radar, which is a high-performance radar developed for long-range wave measurement, operating in the lower half of the HF band (5-10 MHz).

Item ID: 29067
Item Type: Article (Research - C1)
ISSN: 1751-8784
Date Deposited: 28 Aug 2013 09:25
FoR Codes: 09 ENGINEERING > 0906 Electrical and Electronic Engineering > 090609 Signal Processing @ 90%
04 EARTH SCIENCES > 0405 Oceanography > 040503 Physical Oceanography @ 10%
SEO Codes: 96 ENVIRONMENT > 9611 Physical and Chemical Conditions of Water > 961104 Physical and Chemical Conditions of Water in Marine Environments @ 20%
85 ENERGY > 8505 Renewable Energy > 850508 Wave Energy @ 5%
97 EXPANDING KNOWLEDGE > 970109 Expanding Knowledge in Engineering @ 75%
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