Results 131 to 140 of about 75,280 (194)

Usage of Costas arrays in Low Probability of Intercept radars [PDF]

2015 23nd Signal Processing and Communications Applications Conference (SIU), 2015
Low Probability of Intercept (LPI) radars are used to detect targets at low distances by means of coded signals without being intercepted by hostile elements. Frequency Shift Keying (FSK) is one of the signal types used by LPI radars. In LPI radars, the frequency sets of FSK signals, which are constructed with continuous wave, are obtained by using ...
Fatih Gulec, Erkan Afacan
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Detection of low probability of intercept signals in low SNR using multichannel sensor arrays [PDF]

2014 22nd Signal Processing and Communications Applications Conference (SIU), 2014
In 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.
Can Uysal, Tansu Filik
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Automated and Blind Detection of Low Probability of Intercept RF Anomaly Signals [PDF]

Proceedings of the 30th Annual International Conference on Mobile Computing and Networking
Automated spectrum monitoring necessitates the accurate detection of low probability of intercept (LPI) radio frequency (RF) anomaly signals to identify unwanted interference in wireless networks. However, detecting these unforeseen low-power RF signals is fundamentally challenging due to the scarcity of labeled RF anomaly data.
Kunal Gusain, Zoheb Hassan, David Couto, Mai Abdel Malek, Vijay K Shah, Lizhong Zheng, Jeffrey H. Reed   +6 more
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Microwave-photonics direction finding system for interception of low probability of intercept radio frequency signals [PDF]

Optical Engineering, 2018
Direction finding (DF) systems are fundamental electronic support measures for electronic warfare. A number of DF techniques have been developed over the years; however, these systems are limited in bandwidth and resolution and suffer from a complex design for frequency downconversion.
Pace, Phillip Eric, Tan, Chew Kung, Ong, Chee K.   +2 more
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Low Probability of Intercept Waveform Optimization Method for Sar Imaging

2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021
The survivability and stability of synthetic aperture radar (SAR) in the increasingly severe electromagnetic environment are widely concerned. With the development of interception receiver technology, it is very difficult to prevent the competitor from detecting the radio frequency (RF) energy of radar.
Mingyue Lou, Taineng Zhong, Min Li 0031, Xinzhou Li, Zhongyu Li 0001, Junjie Wu 0001, Jianyu Yang 0001   +6 more
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A study on the feasibility of low probability of intercept sonar

2009 43rd Annual Conference on Information Sciences and Systems, 2009
We explore the feasibility of low probability of intercept for sonar signals. Using a noise-like active sonar signal, the transmitter (platform) employs a matched filter for echo detection while the target is assumed to use an energy detector. Decision statistic distributions are developed at both the platform and target.
J. Daniel Park, David J. Miller 0001, John F. Doherty, Stephen C. Thompson   +3 more
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The metrication of low probability of intercept waveforms

2010 International Waveform Diversity and Design Conference, 2010
In recent years, military radar operators have been concerned that the transmitted radar signals will beacon the presence of the radar to an enemy. If intercepted, the radar signals alert a target to an attack which could prompt evasive measures or countermeasures to be taken by the target including the possibility of a reprisal attack using an ...
C. Fancey, C. M. Alabaster
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Low probability of intercept radar strategies

IEE Proceedings - Radar, Sonar and Navigation, 2004
To reduce probability of intercept, in most cases, the form and magnitude of the radar transmissions are designed to spread energy over as wide a range of dimensions as possible. Equally, in response to this, designs for electronic surveillance measures (ESM) systems have been postulated that increase receiver sensitivity.
A.G. Stove, A.L. Hume, C.J. Baker
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Low probability of intercept property of binary sidel'nikov sequences

2015 International Conference on Information and Communication Technology Convergence (ICTC), 2015
In this paper, we consider the low probability of intercept (LPI) property of the binary Sidel'nikov sequences. We derive the LPI property of the sequences by deriving the triple autocorrelation bound of the binary Sidel'nikov sequences. The derived bound is approximately twice of square root of the period of the sequences, which is similar to that of ...
Ji-Woong Jang, Young-Sik Kim
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Optimalwaveform design for MIMO radarwith low probability of interception

2011 17th International Conference on Digital Signal Processing (DSP), 2011
In this paper, we consider the waveform design problem of multiple input multiple output (MIMO) radar in the presence of an interceptor. By the joint considerations of high estimation accuracy and low probability of interception, we formulate the problem as maximizing the mutual information with a constraint on the Kullback-Liebler (KL) divergence ...
Songbai Wang, Jian Wang, Jianshu Chen, Xiuming Shan   +3 more
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