access icon free Doppler spectra of medium grazing angle sea clutter; part 2: model assessment and simulation

© The Institution of Engineering and Technology
Received 10/03/2015, Accepted 02/10/2015, Revised 26/08/2015, Published 01/01/2016

This study is concerned with the assessment of models of Doppler spectra, derived from high range resolution X-band radar sea clutter observed from an airborne platform over the range of grazing angles, 15–45°. When looking up or downwind these models represent the strong correlation between mean Doppler shift and local spectrum intensity. When combined with random fluctuations of spectrum width, these characteristics give the spectra a temporal and spatial variability. The models are used to predict clutter spectrum statistics as a function of Doppler frequency and these are compared with statistics derived from the original data. It is also shown how realistic range-varying coherent clutter returns can be simulated using the models.

Inspec keywords: fluctuations; airborne radar; correlation methods; statistical analysis; radar signal processing; radar clutter; Doppler radar; Doppler shift

Other keywords: spectrum width; clutter spectrum statistics prediction; airborne platform; spectrum intensity; Doppler spectra model assessment; mean Doppler shift; random fluctuations; spatial variability; range-varying coherent clutter returns; model assessment; strong correlation representation; temporal variability; model simulation; medium grazing angle sea clutter; high range resolution X-band radar sea clutter; Doppler frequency

Subjects: Other topics in statistics; Signal processing and detection; Radar equipment, systems and applications

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