Results 151 to 160 of about 63,218 (203)

Polarimetric Characteristics of X-Band SAR Sea Clutter

2006 IEEE International Symposium on Geoscience and Remote Sensing, 2006
The polarimetric characteristics of X-Band sea clutter are investigated using data from the DSTO Ingara airborne radar operating in a circular spotlight geometry. An analysis of the Doppler spectrum as a function of azimuth geometry with respect to the wind direction shows the difference in the surface velocity between the HH and VV scattering ...
N. Stacy, M. Preiss, D. Crisp
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Clutter Modeling and Characteristics Analysis for Bistatic SBR

2007 IEEE Radar Conference, 2007
In order to analyze clutter characteristics and develop clutter suppression method, clutter modeling is very important. In this paper, we introduce the clutter modeling method of bistatic space-based radar (SBR) and obtain the analytic resolution of the clutter isorange contour in a range gate. Besides, the Earth's rotation effect is taken into account
Hua Li, Jun Tang, Yingning Peng
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Ocean clutter characteristics for a coherent Doppler UHF radar

OCEANS 2000 MTS/IEEE Conference and Exhibition. Conference Proceedings (Cat. No.00CH37158), 2002
A coherent UHF radar has been developed by the authors for the detection of small targets in high sea-states. There are several important advantages that can be exploited by operating in the UHF band. The UHF spectrum has been proven to provide a window where the clutter energy scattered back from the sea is significantly less than at other radar ...
C. Randell, D. Power, R. Khan
openaire   +1 more source

Measurements of Characteristics of Clutter

Measurement Techniques, 2017
Maximum likelihood algorithms for estimating parameters of a correlation matrix of clutter for adaptive allocation of signals of moving targets in multifrequency coherent pulse radar-tracking systems are synthesized. Schematic diagrams of the corresponding measuring instruments are provided.
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Space-Time Clutter Simulation and Characteristics Analysis for SBR

2009 International Joint Conference on Computational Sciences and Optimization, 2009
In order to develop clutter mitigation techniques, clutter simulation and characteristics analysis is very important. By introducing the clutter model of Space Based Radar (SBR) and discussing the earth's rotation effect to Doppler frequency, we get the space-time clutter spectrum of SBR.
Chunlin Tang, Xuegang Wang, Zhuming Chen, Fuming Sun   +3 more
openaire   +1 more source

Clutter Modeling and Characteristic Analysis for Airborne MIMO Radar

Advanced Materials Research, 2014
For the issue of MIMO airborne radar clutter modeling in different environment conditions, a clutter modeling method based on composite model is proposed. It builds different types of clutter model through the changes of model parameters. The clutter model consists of clutter amplitude distribution model, and clutter cell scattering model.
Lin Hao, Yong Shun Zhang, Zhe Li, Jie Xu
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Effects of geometry on clutter characteristics of bistatic radars

Proceedings of the 2003 IEEE Radar Conference (Cat. No. 03CH37474), 2004
This paper deals with the clutter characteristics of multichannel airborne radars. The analysis is performed using the clutter spectral center, which is a descriptive metric, in addition to commonly used measures such as Doppler-angle traces, iso-range, and iso-Doppler contours etc.
null Yuhong Zhang, B. Himed
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Analysis of Sea Clutter Characteristics at High Grazing Angle

2017 International Conference on Computer Systems, Electronics and Control (ICCSEC), 2017
The analysis of sea clutter statistical characteristics is very important for establishing a sea clutter model that can approximate the actual sea clutter as much as possible. In this paper, we systematically analyze the sea clutter characteristics including the time correlation, spatial correlation and Doppler characteristics of the measured data at ...
Hengyan Liu, Wei Xiong, Jie Song
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Characteristics of pausing in normal, fast and cluttered speech

Clinical Linguistics & Phonetics, 2016
One of the main symptoms of cluttering is atypical pausing. However, there is little information about what this atypical pausing means, because typical speakers also have pauses not only at syntactic boundaries, but also within syntactic structures, and even within words.
openaire   +3 more sources

Characteristic research of ionospheric clutter in over the horizon HFSWR

IET Conference Publications, 2009
The presence of ionospheric clutter in high-frequency over the horizon surface wave radar may extremely affect the performance of radar system and degrade the capability of detecting target, so it should be suppressed. The characteristic analysis of ionospheric clutter is the foundation of studying method to suppress ionospheric clutter, so it is ...
null Jiang Wei, null Deng Weibo
openaire   +1 more source