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Digital beam forming in adaptive array system can be achieved by down converting frequency of received signal RF to IF-a low frequency that can be sampled and processed in real time by the digital signal processors. For this we need channel devices like low noise amplifier, down converter and band pass filter for every array elements i.e. for 16 times16 array antenna we need 16 times 16 channel devices...
Polarimetric SAR provides a substantial source of information over conventional imaging radars. Fully polarimetric PALSAR data has been used for land cover classification. Co and Cross Polarization signatures for different classes are obtained in linear (h,v) and circular (l.r) basis. Different combinations from both basis have been extracted for the (principal component analysis) PCA. Supervised...
In this paper a simple and efficient numerical procedure for treating problems of radar cross section (RCS) prediction of arbitrarily shaped Perfect Electric Conductor (PEC) objects is developed using Micro-ElectroMechanicalSystems(MEMS). Surface Acoustic Wave (SAW) devices perform a radar measurement using impulse response of the SAW transponder via a high frequency electromagnetic radio link. By...
For pt. I see ibid., p.614-17, (2008). Monostatic co- & cross-linearly polarized RCS of a perfectly conducting ballistic missile along a preloaded nominal trajectory are evaluated from a particular radar location. Importance of aspect & polarization dependent co- & cross- polarized RCS of the modeled missile along its preloaded trajectory & the effects of its variation on tracking...
This paper presents a radar emitter identification and classification technique based on Fuzzy ART and ARTMAP Neural Networks. The radar emitterpsilas parameters of RF, PW, PRI, Direction of Arrival(DOA) etc., are taken as inputs for the networks. The network is trained with the available data of the emitter types. After training, the network is used to identify the emitter type by applying the parameters...
Synthetic Aperture Radar (SAR) is capable of generating fine-resolution images of the earth terrain unhindered by weather and illumination conditions. These special properties develop interest in the researchers worldwide for maximum use of radar images for various applications. In this chain, monitoring natural disaster with SAR images is one of the challenging research areas. The present paper deals...
Worldwide, medium- to short-term earthquake prediction is becoming ever more essential for safeguarding man due to an un-abating population increase, but hitherto there have been no verifiable methods of reliable earthquake prediction developed - except for a few isolated examples of earthquake prediction in China and in Greece. This dilemma is a result of previous and still current approaches to...
A theoretical technique is presented for determination of monostatic co- & cross-linearly polarized radar cross section of a modeled ballistic missile at each point on its nominal trajectory. The modeled missile is considered perfectly conducting. Techniques to determine co- &cross- polarized RCS of the missile using relative phase & random phase methods from the aspect and polarization...
The development of radar polarimetry and radar interferometry is advancing rapidly, and these novel radar technologies are revamping "synthetic aperture radar imaging" decisively. In this exposition the successive advancements are sketched; beginning with the fundamental formulations and high-lighting the salient points of these diverse remote sensing techniques. Whereas with radar polarimetry...
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