Results 21 to 30 of about 9,067 (287)

A Truncated Matched Filter Method for Interrupted Sampling Repeater Jamming Suppression Based on Jamming Reconstruction [PDF]

Remote Sensing, 2021
Interrupted sampling repeater jamming (ISRJ) is becoming more widely used in electronic countermeasures (ECM), thanks to the development of digital radio frequency memory (DRFM). Radar electronic counter-countermeasure (ECCM) is much more difficult when the jamming signal is coherent with the emitted signal. Due to the intermittent transmission feature
Lu Lu, Meiguo Gao
openaire   +2 more sources

The packing of granular polymer chains [PDF]

, 2009
Rigid particles pack into structures, such as sand dunes on the beach, whose overall stability is determined by the average number of contacts between particles.
Donev, Finney, H. M. Jaeger, Knight, L.-N. Zou, M. L. Rivers, Mailman, Man, S. R. Nagel, Villarruel, Williams, X. Cheng   +11 more
core   +1 more source

Interrupted-Sampling Repeater Jamming-Suppression Method Based on a Multi-Stages Multi-Domains Joint Anti-Jamming Depth Network

Remote Sensing, 2022
Jamming will seriously affect the detection ability of radar, so it is essential to suppress the jamming of radar echoes. Interrupted-sampling repeater jamming (ISRJ) based on a digital-radio-frequency-memory (DRFM) device can generate false targets at ...
Xuesi He, Kuo Liao, Shupeng Peng, Zhenjie Tian, Jiyan Huang   +4 more
doaj   +1 more source

Using EMD-FrFT filtering to mitigate high power interference in chirp tracking radars [PDF]

, 2011
This letter presents a new signal processing subsystem for conventional monopulse tracking radars that offers an improved solution to the problem of dealing with manmade high power interference (jamming).
Elgamel, Sherif, Soraghan, John
core   +1 more source

Robust Beamforming Based on Covariance Matrix Reconstruction in FDA-MIMO Radar to Suppress Deceptive Jamming

Sensors, 2022
Frequency diverse array (FDA)-multiple-input multiple-output (MIMO) radars can generate a range-angle two-dimensional transmit steering vector (SV), which is capable of suppressing mainbeam deceptive jamming in the transmit–receive frequency domain by ...
Fuhai Wan, Jingwei Xu, Zhenrong Zhang
doaj   +1 more source

Radar main‐lobe jamming suppression and identification based on robust whitening Blind Source Separation and Convolutional Neural Networks

IET Radar, Sonar & Navigation, 2022
The main‐lobe jamming causes serious degradation of radar system performance in practical applications. In recent years, the Blind Source Separation (BSS) method has been applied to suppress the main‐lobe jamming.
Sheng Gao, Xiaopeng Yang, Tian Lan, Bowen Han, Haoran Sun, Zhichao Yu   +5 more
doaj   +1 more source

Direction and distribution sensitivity of sup-DOF interference suppression for GNSS array antenna receiver

Frontiers in Physics, 2023
Introduction: Distributed wideband jamming (interference) is commonly used in navigation countermeasure. Due to the limited volume of GNSS (Global Navigation Satellite System) array antenna receiver, the number of interferences usually exceeds the number
Yifan Sun, Feiqiang Chen, Feixue Wang, Wenxiang Liu, Baiyu Li, Jie Song   +5 more
doaj   +1 more source

Sparse Bayesian learning‐based mainlobe blanket jamming suppression algorithm

The Journal of Engineering, 2019
The suppression of mainlobe jamming (MLJ) is a hard task and an open problem in the electronic counter‐countermeasures field. In this article, a sparse Bayesian learning (SBL)‐based mainlobe blanket jamming suppression algorithm is proposed for solving this problem, which can effectively suppress the MLJ and estimate the target distance and direction ...
Bilei Zhou, Keqing Duan, Weijian Liu, Rongfeng Li, Yongliang Wang   +4 more
openaire   +2 more sources

Exploiting Full-duplex Receivers for Achieving Secret Communications in Multiuser MISO Networks

, 2017
We consider a broadcast channel, in which a multi-antenna transmitter (Alice) sends $K$ confidential information signals to $K$ legitimate users (Bobs) in the presence of $L$ eavesdroppers (Eves).
Akgun, Berk, Koyluoglu, O. Ozan, Krunz, Marwan   +2 more
core   +1 more source

Enhanced Mainlobe Jamming Suppression in Distributed Array Radar via Joint Optimization of Radar Positions and Subpulse Frequencies

Remote Sensing
This study presents a joint optimization framework for radar positions and subpulse carrier frequencies to address mainlobe jamming suppression in a distributed array radar system with one main and multiple auxiliary radars.
Weiming Pu, Kewei Feng, Xiaoping Wang, Zhennan Liang, Xinliang Chen, Quanhua Liu   +5 more
doaj   +1 more source