Advanced intermittent clutter filtering for radar wind profiler: signal separation through a Gabor frame expansion and its statistics
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چکیده
منابع مشابه
Advanced Intermittent Clutter Filtering for Radar Wind Profiler: Signal Separation through a Gabor Frame Expansion and its Statistics
A new method is presented for the suppression of intermittent clutter echoes in radar wind profilers. This clutter type is a significant problem during the seasonal bird migration and often results in large discrepancies between profiler wind measurements and independent reference data. The technique presented makes use of a discrete Gabor frame expansion of the coherently averaged time series ...
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The standard RWP signal processing usually assumes, that the received voltage signal at the receiver output S(t) is the sum realization of the atmospheric scattering process I(t) and the receiver noise N(t). Both can be regarded as independent stationary Gaussian random processes. All terms are complex-valued base-band voltages that are obtained after demodulation at the receiver output. Statio...
متن کاملStatistical Significance of Gabor Frames Expansions - Simple Filtering Principles for Radar Wind Profiler Data
A new signal processing method is presented for the suppression of intermittent clutter echoes in radar wind profilers. The technique presented makes use of a discrete Gabor frame expansion in combination with a statistical significance test. The rationale of this algorithm is outlined and an example using data obtained with an operational 482 MHz wind profiler is given.
متن کاملRadar wind profiler signal characteristics during bird migration episodes
The Gabor transform is used to investigate non-stationary wind profiler radar signals, which are frequently occurring during the seasonal bird migration. It is shown that the Gabor phase space representation contains a wealth of information and can be effectively used to separate the atmospheric signal component from the clutter. The crucial role of the dwell time as one of the primary sampling...
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In this paper, two suboptimum detectors are proposed for coherent radar signal detection in K-distributed clutter. Assuming certain values for several initial moments of clutter amplitude, the characteristic function of the clutter amplitude is approximated by a limited series. Using the Pade approximation, it is then converted to a rational fraction. Thus, the pdf of the clutter amplitude is o...
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ژورنال
عنوان ژورنال: Annales Geophysicae
سال: 2008
ISSN: 1432-0576
DOI: 10.5194/angeo-26-759-2008