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Browsing by Author "Herselman, PL"

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Analysis of X-band calibrated sea clutter and small boat reflectivity at medium-to-low grazing angles

Author: Herselman, PL ; Baker, CJ ; De Wind, HJ Date: Nov 2008 The coherent temporal characteristics of medium-to-low grazing angle sea clutter and small boat reflectivity are considered for different radar waveforms under a range of environmental conditions and geometrical configurations. Accurate ... Read more
Digital instantaneous frequency measurement technique utilising high-speed ADC’s and FPGA’s

Author: Herselman, PL ; Cilliers, Jacques E Date: 27 Feb 2006 This paper presents the Digital Instantaneous Frequency Measurement (DIFM) technique, which can measure the carrier frequency of a received waveform within a fraction of a microsecond. The resulting frequency range, resolution and accuracy ... Read more
Effect of DRFM phase responsext on the doppler spectrum of a coherent radar: critical implications and possible mitigation techniques

Author: Herselman, PL ; Nel, Willem AJ ; Cilliers, Jacques E Date: Feb 2006 In this research, the critical implications of the phase response of a Digital Radio Frequency Memory (DRFM) based repeater system on the Doppler spectrum of a modern, coherently processing radar system (for example pulsed Doppler radar) are ... Read more
Improved covariance matrix estimation in spectrally inhomogeneous sea clutter with application to adaptive small boat detection.

Author: Herselman, PL ; De Wind, HJ Date: Sep 2008 Asymptotically optimal coherent detection techniques yield sub-clutter visibility in heavy-tailed sea clutter. The adaptive linear quadratic detector inherently assumes spectral homogeneity for the reference window of the covariance matrix ... Read more

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Browsing by Author "Herselman, PL"

Browsing by Author "Herselman, PL"

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