Results 191 to 200 of about 2,705,955 (242)

Low probability of intercept (LPI) techniques and implementations for radar systems

Proceedings of the 1988 IEEE National Radar Conference, 2003
After a brief overview of optimal low-probability of intercept (LPI) radar design criteria, it is shown that for a given radar signal code length, many more codes are available by using higher-order Galois fields; that is, polyphase coding will supply the required diversity. Various aspects of polyphase coding are described because Doppler compensation
E.J. Carlson
semanticscholar   +4 more sources

Waveform design for MIMO radar with low probability of intercept (LPI) property

2011 IEEE International Symposium on Antennas and Propagation (APSURSI), 2011
A joint waveform and array signal processing approach is proposed to minimize MIMO radar antenna radiation power for best low probability of intercept (LPI) property in pre-selected directions and to achieve near-optimum target detection simultaneously. Some simulation results are presented.
Hai Deng
semanticscholar   +4 more sources

Personnel identification system utilizing low probability of intercept (LPI) techniques for covert operations

Proceedings of IEEE International Carnahan Conference on Security Technology, 2002
The paper documents the design of a laser/radiofrequency (RF) personnel identification (ID) system developed by Dynetics Inc., Harris Corp., and the US Army Communications and Electronics Command (CECOM). The ID system includes an interrogation unit with a programmable activation code.
C.S. Anderson, D.A. Hess, M.C. Zari, D. Chiang, K.W. Snow, A.F. Zwilling   +5 more
semanticscholar   +4 more sources

Low-Probability-of-Intercept/Detect (LPI/LPD) Secure Communications Using Phased-Arrays Employing Side-Lobe Time Modulation

2022 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM), 2022
We present an approach for achieving low-probability-of-intercept (LPI) and low-probability-of-detect (LPD) secure communications. The proposed approach uses a phased-array antenna with rapid side-lobe time modulation (SLTM) capabilities.
Jiahao Zhao, John H. Booske, Nader Behdad   +2 more
semanticscholar   +3 more sources

Soldier Identification System utilizing low probability of intercept (LPI) techniques

IEEE Aerospace and Electronic Systems Magazine, 1997
This paper documents the design of a laser/radio frequency (RF) Soldier Identification (ID) System developed by Dynetics, Inc., Harris, Corp., and the US Army Communications and Electronics Command (CECOM). The Soldier ID system includes an Interrogation Unit with a programmable activation code.
D. Chiang, A.F. Zwilling, C.S. Anderson, J. Jo, D.A. Hess, M.C. Zari   +5 more
semanticscholar   +4 more sources

Wavelength Diversity based Low Probability to Intercept (LPI) Free-Space Optical Communications in Strong Turbulence Regime

Frontiers in Optics + Laser Science 2023 (FiO, LS), 2023
In this paper we present the experimental results demonstrating improvements in BERs from wavelength diversity in the LDPC coded LPI communication over a 1.5 km long free-space optical communication in the presence of strong atmospheric turbulence.
Vijay Nafria, Ivan B. Djordjevic
semanticscholar   +3 more sources

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.
George W. Stimson
semanticscholar   +4 more sources

Frequency Hopping Patterns for Low Probability of Intercept (LPI) Radars Using Costas Arrays

Lecture Notes in Electrical Engineering, 2021
T. A. N. S. N. Varma, Anjaneyulu Gera
semanticscholar   +3 more sources

On the Sensitivity of Wideband Radiometric Detection for Low Probability of Intercept and Probability of Detection (LPI/LPD) in Frequency Hopped Systems

MILCOM 2013 - 2013 IEEE Military Communications Conference, 2013
Using radiometric detection, the detection threshold for a wideband radiometer (WR) to detect bursty signals e.g., transmission with duty cycle in frequency hopped systems is discussed in the paper. For this detector, the detection threshold is characterized by the probabilities of false alarm and detection, hopping bandwidth, duration of transmission,
Lan K. Nguyen, Mario A. Blanco, Louis J. Sparace   +2 more
openaire   +3 more sources

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Deep Learning-Enabled Deceptive Jammer Detection for Low Probability of Intercept Communications

IEEE Systems Journal, 2023
The detection of deceptive jamming in low probability of intercept/low probability of detection (LPI/LPD) tactical communications has been receiving increasing attention, especially in the context of radar communications.
Hamda Bouzabia, Tri Nhu Do, Georges Kaddoum   +2 more
semanticscholar   +1 more source