Results 11 to 20 of about 474,877 (261)

Analysis of Low Probability of Detection Capability for Chaotic Standard Map-Based FH-OFDMA System

Applied Sciences, 2021
A frequency hopping orthogonal frequency division multiple access (FH-OFDMA) can provide low probability of detection (LPD) and anti-jamming capabilities to users against adversary detectors. To obtain an extreme LPD capability that cannot be provided by
Junwoo Jung, Jaesung Lim, Sungyeol Park, Haengik Kang, Seungbok Kwon   +4 more
doaj   +1 more source

Using areas of known occupancy to identify sources of variation in detection probability of raptors: taking time lowers replication effort for surveys [PDF]

Royal Society Open Science, 2016
Species occurring at low density can be difficult to detect and if not properly accounted for, imperfect detection will lead to inaccurate estimates of occupancy.
Campbell Murn, Graham J. Holloway
doaj   +1 more source

Optimal Search Strategy of Low-Altitude Target for Airborne Phased Array Radar Using Digital Elevation Model

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
The search for low-altitude targets becomes a more challenging task for airborne phased array radar, due to the limited system resources and serious ground clutter.
Jiawei Luo, Yulin Huang, Yongchao Zhang, Deqing Mao, Wei Yang, Yin Zhang, Jianyu Yang   +6 more
doaj   +1 more source

Limits of Reliable Communication with Low Probability of Detection on AWGN Channels [PDF]

IEEE Journal on Selected Areas in Communications, 2013
Major revision in v2. Context, esp. the relationship to steganography updated. Also, added discussion on secret key length. Results are unchanged from previous version. Minor revision in v3. Major revision in v4, Clarified derivations (adding appendix), also context, esp. relationship to previous work in communication updated.
Boulat A. Bash, Dennis Goeckel, Don Towsley   +2 more
openaire   +4 more sources

Analysis of the low-probability-of-detection characteristics of ultraviolet communications

Optics Express, 2020
Deep ultraviolet wavelengths have been proposed for low-probability-of-detection (LPD) communications, particularly for non-line-of-sight (NLOS) links, because of the increased atmospheric absorption at these wavelengths. Motivated by this favorable feature, we develop a modeling framework to quantitatively study the LPD characteristics of ultraviolet ...
Michael J. Weisman, Fikadu T. Dagefu, Terrence J. Moore, C. Hakan Arslan, Robert J. Drost   +4 more
openaire   +2 more sources

Assessing respiratory pathogen communities in bighorn sheep populations: Sampling realities, challenges, and improvements. [PDF]

PLoS ONE, 2017
Respiratory disease has been a persistent problem for the recovery of bighorn sheep (Ovis canadensis), but has uncertain etiology. The disease has been attributed to several bacterial pathogens including Mycoplasma ovipneumoniae and Pasteurellaceae ...
Carson J Butler, William H Edwards, Jessica E Jennings-Gaines, Halcyon J Killion, Mary E Wood, Douglas E McWhirter, J Terrill Paterson, Kelly M Proffitt, Emily S Almberg, P J White, Jay J Rotella, Robert A Garrott   +11 more
doaj   +1 more source

Low False Alarm and Narrow-Wide Band Compatible Signal Detection Algorithm Combining the Multiscale Wavelet Transform Extremum Detection With the Spectrum Energy Detection

IEEE Access, 2023
A low false alarm and narrow-wide band compatible signal detection algorithm is proposed by combining the multiscale wavelet transform extremum detection with the spectrum energy detection. The signals with different bandwidths are detected at respective
Weiying Huang, Ren Wang
doaj   +1 more source

A Novel Frequency-Hopping Sequence for Covert Communication

IEEE Access, 2017
In this paper, a novel frequency-hopping sequence with lower probability of detection is proposed for covert communication systems. By formulating and solving a constrained optimization problem, a probability vector aiming for covert communication is ...
Ben Ning, Lei Guan, Haiyan Huang
doaj   +1 more source

Detectability models for multiple access low-probability-of-intercept networks [PDF]

IEEE Transactions on Aerospace and Electronic Systems, 2000
Increased demands for communications in the tactical battlefield have driven the development of multiple access low-probability-of-intercept (LPI) networks. Most detectability studies of LPI networks focus on the individual links of the network, in which the intercept and detectability calculations are conducted for a single network transmitter.
Prescott, Glenn Eugene, Mills, Robert F.
openaire   +2 more sources

Cooperative Anti-jamming Method of Data Link Based on Adaptive Threshold [PDF]

Jisuanji gongcheng, 2018
In order to enhance the anti-jamming capability of data link in low Signal to Noise Ratio(SNR) environment,this paper improves the energy detection method based on invariable threshold and proposes an adaptive threshold anti-jamming method based on ...
YANG Mu,CHEN Changxing,LING Yunfei,LIN Xing,WANG Xiaodong
doaj   +1 more source