Showing papers by "Edward Hoare published in 2013"
TL;DR: The forward scatter Doppler phase signature formation is analysed to show the rationale for the forward scatter radar in the true sense of the meaning, where a target actually crosses the baseline; so the advantage of the main shadow lobe is taken and, therefore a forward scatter effect occurs to enhance signal to clutter ratio.
Abstract: In this study, the forward scatter Doppler phase signature formation is analysed to show the rationale for the forward scatter radar in the true sense of the meaning, where a target actually crosses the baseline; so the advantage of the main shadow lobe is taken and, therefore a forward scatter effect occurs to enhance signal to clutter ratio. The modelling approach suggested is based on the consideration of the Doppler phase signature as a result of superposition of the direct path signal and the shadow radiation signal. It is shown that the target signature may be represented as a Doppler signature of a point-like target specified by its trajectory and speed, which is modulated according to forward scatter cross-section of an actual extended target specified by its silhouette at each moment of motion. The proposed model may be recommended to provide matched filtering in coherent processing. Finally, the approach is verified experimentally using calibrated targets with conductive and absorbing coating in the controlled environment and maritime targets in the real sea conditions.
65 citations
TL;DR: It is shown that using a relatively small modernisation of traditional signal processing algorithms, a PCL system may effectively operate against stealth and low profile targets crossing or being located in the vicinity of the radar baseline.
Abstract: The transfer of the forward scatter (FS) concept to passive coherent location (FS PCL) systems provides a new emerging area of research. This article is dedicated to the investigation of various aspects of a bistatic passive coherent location (PCL) system operating in the FS mode. For efficient signal processing, appropriate FS PCL system analysis is presented. It is shown that using a relatively small modernisation of traditional signal processing algorithms, a PCL system may effectively operate against stealth and low profile targets crossing or being located in the vicinity of the radar baseline. The FS signals have been analysed in view of finding key effects and parameters influencing the waveforms and spectra which define the overall signal processing. Experimental results are given to validate the presented analysis.
39 citations
04 Nov 2013
TL;DR: This paper investigates aspects of such a system through analysis and discussion of previous dedicated forward scatter radar research, showing that indeed the addition of a forward scatter channel to existing passive systems would enhance the current capabilities.
Abstract: The transfer of the forward scatter concept to passive coherent location systems provides an emerging area of research. This paper investigates aspects of such a system through analysis and discussion of previous dedicated forward scatter radar research, showing that indeed the addition of a forward scatter channel to existing passive systems would enhance the current capabilities.
9 citations
Proceedings Article•
19 Jun 2013TL;DR: In this article, the forward scatter radar (FSR) data for low sea states 1-3 were collected at frequencies of 7.5 GHz and 24 GHz with static, medium gain antennas.
Abstract: In order to develop Forward Scatter Radar (FSR) systems for use in maritime applications a fundamental understanding of the operating environment is required. Currently there is a lack of published experimental sea clutter data measured in the forward scatter direction at very low (almost zero) grazing angles. Therefore to facilitate further investigation, clutter data for such a system have been recorded at frequencies of 7.5 GHz and 24 GHz with static, medium gain antennas for low sea states 1-3. Statistical analysis of clutter is presented and results are compared for different radar parameters, waveforms and diverse sea conditions.
7 citations