Results 121 to 130 of about 19,053 (161)
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Radar speckle: noise or information?
IGARSS '96. 1996 International Geoscience and Remote Sensing Symposium, 2002The authors examine radar speckle from a non-traditional perspective. Instead of viewing radar speckle as noise, they attempt to assess the information content of radar speckle. A speckle identification algorithm is developed to separate speckle from pixels of "normal" returns. The relationships between land cover types and the density and roughness of
null Zong-Guo Xia, null Yongwei Sheng
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Scalable pseudo-random noise radar
2017 18th International Radar Symposium (IRS), 2017This paper describes the implementation of a pseudo-random noise radar system on a scalable sensor platform that consists of several multi-purpose 61- and 122-GHz transceivers in a Silicon-Germanium BiCMOS technology. The multi-band transceivers are equipped with a frequency multiplier to generate the 61- and 122-GHz carrier signals from a single 30.5 ...
Herman Jalli Ng +3 more
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Radar's TWT phase noise reduction
IEEE International Radar Conference, 2005., 2005The traveling wave tube amplifier (TWTA) requires stringent phase noise performance for radar transmitters. A modified phase locking loop feedback method is introduced to reduce the phase noise by more than 20 dB in CW mode and 15 dB pulsed mode over 500 MHz bandwidth in X-band.
null Jae Seung Lee +3 more
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2011
The ability of MIMO radar to measure propagation delays from each transmitter to each receiver allows the concept of the sum co-array, reviewed, to be exploited. The sum co-array allows virtual elements to be synthesized and in some cases this can lead to performance advantages. The relationship of the ES matched filter to the sum co-array is discussed
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The ability of MIMO radar to measure propagation delays from each transmitter to each receiver allows the concept of the sum co-array, reviewed, to be exploited. The sum co-array allows virtual elements to be synthesized and in some cases this can lead to performance advantages. The relationship of the ES matched filter to the sum co-array is discussed
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Compressive Sensing Meets Noise Radar
2014In this chapter, we discuss how noise radar systems are suitable for realizing practically the promises of compressive sensing in radar imaging, in general, and in urban-sensing applications, in particular. Noise radar refers to radio frequency imaging systems that employ transmit signals that are generated to resemble random noise waveforms.
Mahesh C. Shastry +2 more
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2017
The well-known classical pulse radar has several disadvantages. The high transmitted peak power can be easily detected and warn an enemy, and the ambiguities in both range and Doppler measurements lead to problems with unambiguous localization and tracking.
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The well-known classical pulse radar has several disadvantages. The high transmitted peak power can be easily detected and warn an enemy, and the ambiguities in both range and Doppler measurements lead to problems with unambiguous localization and tracking.
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Millimeter-wave noise radar tomography
2016 9th International Kharkiv Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves (MSMW), 2016SAR tomography based upon MIMO concept with channels time-division is described and some results of its experimental validation using Ka-band ground based noise waveform SAR are presented. Two different linear synthetic apertures have been used for both transmit and receive antennas oriented in vertical and horizontal directions, respectively.
Konstantin Lukin +11 more
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Millimeter wave noise radar technology
Third International Kharkov Symposium 'Physics and Engineering of Millimeter and Submillimeter Waves'. MSMW'98. Symposium Proceedings (Cat. No.98EX119), 2002We present the main results of theoretical and experimental development of the NRT (noise radar technology) for the MM waveband which has been studied at the Laboratory of Nonlinear Dynamics of Electronic Systems (LNDES) of the Institute of Radiophysics and Electronics, National Academy of Sciences of Ukraine since 1990.
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Dedicated applications of Noise Radars
2015 16th International Radar Symposium (IRS), 2015a novel approach for design of Radar sensor for shot range applications based upon Noise Radar Technology is presented. This radar technology relies on transmitting of wideband noise/random signals and coherent processing of radar returns. We have carried out experiments on generation of 2D and 3D tomographic imaging using Ka-band continuous waveform ...
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Radar Noise Jamming Calculations Simplified
IEEE Transactions on Aerospace and Electronic Systems, 1981The ratio of radar jamming noise power to radar thermal noise power (J/N) is examined in a multiple noise jammer environment where jammer distances and energy levels vary. A simpler form of the computation of J/N is shown for several practical multiple noise jammer configurations.
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