Impact of Off-Shore Wind Turbine on Forward Scattering of Marine Radar Signals
Due to stronger wind speeds available on the sea, the majority of future wind energy projects in the EU, in China, and, most likely, in the U.S. will go offshore. Forward scattering (diffraction) of radar signals at a WT causes time-variant areas of obstacle loss (desensitisation, blockage) and areas of obstacle gain behind the turbine. At the same time, rotating blades induce a time-variant phase modulation of the diffracted signal which will become apparent as an error in the measured Doppler spectrum. Wrong estimation of the radial speed of a vessel by marine radar will impact the performance of automatic collision avoidance systems (ACAS). A proper insight into WT forward scattering can help to mitigate this problem.
The error in measured radial speed due to rotor forward scattering is investigated for S-band radar using Fresnel-Kirchhoff diffraction approach. Based on the insight into Fresnel zone shading a scenario with the high impact of rotor forward scattering on the Doppler error is selected. Deviation of instantaneous Doppler frequency, as well as time-frequency spectrum of the modulation signal within the interval of time on target, is investigated.
Date and Time
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Registration
- Date: 23 Apr 2018
- Time: 05:00 PM to 06:00 PM
- All times are (UTC+10:00) Brisbane
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- Griffith University, Nathan Campus
- Brisbane, Queensland
- Australia 4111
- Building: Campus Heart N76
- Room Number: N76_1.02
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- Co-sponsored by Morteza Shahpari
- Starts 12 April 2018 10:05 PM
- Ends 23 April 2018 11:00 PM
- All times are (UTC+10:00) Brisbane
- No Admission Charge
Speakers
Dr Thomas Fickenscher of Helmut Schmidt University
Biography:
Thomas Fickenscher received the Dr.-Ing. degree and the habilitation degree from Helmut Schmidt University (HSU HH), Hamburg, in 1997 and 2005, respectively. In 1997 he joined Siemens AG, where he was involved in the design and development of receiver front-ends for cellular phones. From 1998-2000 he was with Lucent Technologies, Bell Labs, Department of Optics and High Speed Circuit Development, Nuremberg, where he was responsible for optical receiver front-end design. Since 2000, he is head of the Laboratory for High-Frequency Engineering, HSU HH and was appointed as Adj. Ass. Professor at Griffith University, Brisbane, Australia in 2011.
Email:
Address:Hamburg, Hamburg, Germany