Results 261 to 270 of about 1,464,347 (286)
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Detection of low probability of intercept signals in low SNR using multichannel sensor arrays
2014 22nd Signal Processing and Communications Applications Conference (SIU), 2014In this paper, a method is proposed for the detection of low probability of intercept, LPI signals in high noise without prior knowledge and assumption using spatially distributed multichannel wideband sensor array. The proposed detection method uses eigenvalue ratios (EVR) of wideband spatial covariance matrix as test statistic.
Uysal, Can, Filik, Tansu
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Low-Probability of Detection Communications Using Chiral Solutions
IEEE Military Communications ConferenceCovert battlefield communication is crucial for modern military operations, yet traditional radio frequency methods are easily susceptible to detection.
R. McKee, D. Barber, C. Nelson, C. Smith
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Enhanced Distributed Connectivity Control in Low Probability of Detection Operations
2020 Military Communications and Information Systems Conference (MilCIS), 2020For most military land vehicles, communication systems are the main contributor to RF emissions from the vehicle. To reduce detectability of the vehicle, the transmission power of the communications systems should be managed. Accomplishing this without adversely effecting the ability of vehicles to communicate requires a coordinated approach.
Philip Shaw +2 more
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Transmit Beamforming Based on 4-D Antenna Arrays for Low Probability of Intercept Systems
IEEE Transactions on Antennas and Propagation, 2020This article has developed a new approach to combine transmit beamforming techniques and 4-D antenna array theory for simultaneously improving the detection and low probability of intercept (LPI) capabilities of radar.
Kejin Chen +4 more
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Low Probability Detection Constrained Underwater Acoustic Communication: A Comprehensive Review
IEEE Communications MagazineThis research presents a review of low probability of detection (LPD) constrained underwater acoustic communication (UWAC). The recent surge in seabed resource exploration and overseas military operations has reignited interest in LPD CUAC.
Songzuo Liu +3 more
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A wideband, high-resolution, low-probability-of-detection FFT beamformer
IEEE Journal of Oceanic Engineering, 1994Navigation of an underwater minefield by a remotely operated vehicle (ROV) or an autonomous undersea vehicle (AUV) requires the detection, localization, and avoidance of obstacles. The sizes of obstacles to be avoided range from the diameter of cables up to the size of other vehicles.
R.F. Follett, J.P. Donohoe
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Spread spectrum signals with low probability of chip rate detection
IEEE Journal on Selected Areas in Communications, 1989Spread spectrum signals are considered which use spreading codes chosen to give a low probability of chip rate detection. Pulse shaping and pseudorandom amplitude weighting are used to defeat the interceptor who uses a nonlinear circuit to generate a tone at the chip rate. It is shown that a combination of these techniques can, ideally, defeat any such
D.E. Reed, M.A. Wickert
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Covert/Stealth/Low Probability of Detection Communications and QKD
2019This chapter is devoted to covert communications, also known as low probability of detection/intercept, as well as stealth communications, and how they can improve secret-key rate for QKD applications. The chapter starts with brief introduction to covert communications, followed by the description of their differences with respect to steganography. One
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Performance metrics for low probability of detection in cooperative communication networks
OCEANS 2016 - Shanghai, 2016This paper proposes two metrics for evaluating the low probability of detection (LPD) performance in cooperative wireless communication networks. One metric is the distance ration between the minimum range of all the interceptor-relay/transmitter pairs and the intended transmitter-destination distance.
Yahong Rosa Zheng, Li Leo Fan
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Very low probability of detection of TiH2 molecule in a cosmic object
New Astronomy, 2016Abstract In the year 1979, identification of TiH and TiO in the atmosphere of cool M-type stars has been historical, as the Titanium was first time discovered in a cosmic object. Third Titanium-bearing molecule, TiO2, also is identified in the red supergiant VY CMa. Thus, there is a natural question about the detection of TiH2 molecule, as the cosmic
M.K. Sharma, M. Sharma, S. Chandra
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