93 AIJ Electrical & Electronics Engineering, Vol 48, No. 2, Fall 2016 Please cite this article using: Kuhestani, A., Mohammadi, A., and Emadi, M. J., 2016. “Performance Study of Untrusted Relay Network Utilizing Cooperative Jammer”. Amirkabir International Journal of Electrical and Electronics Engineering, 48(2), pp. 93–99. DOI: 10.22060/eej.2016.820 URL: http://eej.aut.ac.ir/article_820.html *...

This paper examines the interference cancellation performance in global positioning system (GPS) receivers equipped with dualpolarized antenna arrays. In dense jamming environment, different types of interferers can be mitigated by the dual-polarized antennas, either acting individually or in conjunction with other receiver antennas. We apply minimum variance distorntionless response (MVDR) met...

In this paper, we investigate the separation and dereverberation performance of frequency domain Blind Source Separation (BSS) based on Independent Component Analysis (ICA) by measuring impulse responses of a system. Since ICA is a statistical method, i.e., it only attempts to make outputs independent, it is not easy to predict what is going on in a BSS system physically. We therefore investiga...

IR active jammers or the directed infrared countermeasures(DIRCM)generate IR signals which attack the guidance signals passed to the sensors in IR-guided weapons. They provide IR signals with appropriate frequency, phase and intensity which will be superposed on those produced by the IR energy of the target passing through the reticle. When both the jamming signal and the modulated target energ...

The problem of providing robustness to the conventional narrow-band uniform linear array configuration so as to handle wide-band and moving jammers is addressed here. This robustness is achieved via the use of derivative constraints in jammer directions. However, since the jammer directions are not known a priori, these constraints are incorporated with a maximum likelihood characterization of ...

Network jammers can uncover the reliability of the wireless networks, where the position of the jammer node permit the network to cope with jamming leveraging varieties of defence strategies. Wireless Bluetooth network is a short range network, where the Bluetooth transceiver is operating in the 2.4 GHz ISM (industrial, scientific and medical) radio band, and a special type of frequency hopping...

Design and Simulation of an Infrared Jammer Source for an Infrared Seeker M. R. Mosavi; M. Asadpour; H. A. Ameri Department of Electrical and Computer Engineering, Behshahr University of Science and Technology ABSTRACT Infrared jammer source is intended for active protection of helicopters against guided missiles with IR homing devices. The majority of such known stations are intended for suppr...

An algorithm based on a space fast-time adaptive processor is presented for nulling the mainlobe jammer when the jammer and the target of interest share the same bearing. The computational load involved in the conventional processor, which blindly looks for the terrain-scattered interference (TSI), is required to stack a large number of consecutive range cell returns to form the space fast-time...

Jamming attacks are especially harmful when ensuring the dependability of wireless communication. Finding the position of a jammer will enable the network to actively exploit a wide range of defense strategies. Thus, in this paper, we focus on developing mechanisms to localize a jammer. We first conduct jamming effect analysis to examine how a hearing range, e.g., the area from which a node can...

In this paper, an uplink pairwise Non-Orthogonal Multiple Access (NOMA) scenario using a mobile access point (AP) or unmanned aerial vehicle in the presence of jamming attack is considered. To mitigate influence attack, joint power allocation and AP placement design proposed. Accordingly, closed-form expressions overall outage probability (OOP) individual (IOP) considering imperfect channel sta...