Results 191 to 200 of about 166,227,053 (240)

The low probability of intercept radar systems with spatial feedback

IEEE EUROCON 2009, 2009
“The radar system with spatial positive feedback throw the target is considered. In this system there are self-oscillations, if the system is closed through a space of the signal radio-path and the target. When the target is absent (system is not closed), transmitter output power of the noise signal is insignificant, and that complicates detection of ...
S.P. Kalenichenko, V.M. Kutuzov
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Low Probability of Intercept (LPI)

1998
Low probability of intercept (LPI) is the term used for there being a low probability that a radar's emissions will be usefully detected by an intercept receiver in another aircraft or on the ground. For the air battle of the future, LPI is essential. In conventional aircraft the most important need for LPI is to avoid electronic countermeasures.
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Detection of multiple access low-probability-of-intercept networks

Proceedings of TCC'94 - Tactical Communications Conference, 2002
Increased demands for highly connective, yet covert, communications in the tactical battlefield have fueled the development of so-called multiple access low-probability-of-intercept (MALPI) networks. Although there have been a number of research efforts regarding the design of MALPI networks, detectability analyses are typically carried out for a ...
R.F. Mills, G.E. Prescott
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Low Probability of Intercept Antenna Array Beamforming

IEEE Transactions on Antennas and Propagation, 2010
A novel transmit array beamforming approach is introduced that offers low probability of intercept (LPI) for surveillance radar systems employing phased array antennas. Radar systems are often highly visible to intercept receivers due to the inherent two-way versus one-way propagation loss.
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A multicarrier CDMA based low probability of intercept network

2010 National Conference On Communications (NCC), 2010
The need for covert communication in tactical battlefields has developed the ideas of low probability of intercept (LPI) networks. Spread spectrum communication is used for LPI communication. Multicarrier CDMA is a new type of spread spectrum technique that has been developed in recent years.
Sayan Ghosal, Devendra Jalihal, K. Giridhar   +2 more
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Blind parameter estimation of low probability of intercept waveforms

Proceedings 7th International Conference on Signal Processing, 2004. Proceedings. ICSP '04. 2004., 2005
A novel algorithm to estimate the parameter of low probability of intercept waveforms is presented, based on RAT, de-chirp and FRFT. Except for carrier frequency and chirp rate of triangular linear frequency modulation continue waveform (TLFMCW), modulation bandwidth and modulation period are also given.
null Yuan Weiming, null Wu Shunjun
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The analysis and design of modern Low Probability of Intercept radar

2001 CIE International Conference on Radar Proceedings (Cat No.01TH8559), 2002
In the modern battlefield, radar faces more and more serious threats from ECM and ARM, etc. Only the Low Probability of Intercept (LPI) radar can survive. In this paper, the principle of LPI radar is introduced first. Then the effects of radar parameters on LPI performance are discussed in detail.
null GuoSui Liu, null Hong Gu, null WeiMin Su, null HongBo Sun   +3 more
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Low Probability of Intercept Radar Waveform Recognition Based on Dictionary Leaming

2018 10th International Conference on Wireless Communications and Signal Processing (WCSP), 2018
Low probability of intercept (LPI) radar waveform recognition is a challenging task in modern radar and electronic warfare (EW) systems. To solve the problem of incomplete information and the need for human experience in the existing feature-based radar recognition methods, a robust and automatic LPI radar waveform recognition method based on Choi ...
Huan Wang, Ming Diao, Lipeng Gao
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Bistatic Radar and Low-Probability-of-Intercept Radar

2004
This discussion of the fundamentals of bistatic radar follows that of Willis, who provides a history of many bistatic radar proposals and programs and a summary of many technical analyses. Figure 13.1 introduces some basic terminology. Instead of two locations of interest (the radar and the target), we now have three (transmitter, Tx; receiver, Rx; and
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Adaptive radar jamming waveform design based on low probability of intercept

2015 IEEE China Summit and International Conference on Signal and Information Processing (ChinaSIP), 2015
Low probability of intercept (LPI) has currently become a central issue in modern electronic warfare. In this paper, the problem of task-dependent adaptive radar jamming waveform design based on LPI is investigated. Firstly, the achievable signal-to-interference-plus-noise ratio (SINR) and mutual information (MI) are derived to evaluate the target ...
Chenguang Shi, Fei Wang 0011, Jianjiang Zhou, Jun Chen 0015   +3 more
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