Conventional anti-jamming methods mainly focus on preventing single jammer attacks with an invariant jamming policy or from multiple jammers similar policies. These are ineffective against a following several different policies distinct Therefore, this article proposes method that can adapt its to the current attack. Moreover, for scenario, estimates future occupied channels using jammers’ in p...

Background: Airport workers are continuously exposed to different levels of radiofrequency microwave (RF/MW) radiation emitted by radar equipments. Radars are extensively used in military and aviation industries. Over the past several years, our lab has focused on the health effects of exposure to different sources of electromagnetic fields such as cellular phones, mobile base stations, mobile ...

Background: Substantial evidence indicates that exposure to electromagneticfields (EMF) above certain levels can affect human health through triggering somebiological responses. According to WHO, short-term exposure to EMF at the levelspresent in the home/environment do not cause any apparent detrimental effects inhealthy individuals. However, now, there is a debate on whether long-term exposur...

Mobile phones and Wi-Fi radiofrequency radiation are among the main sources of the exposure of the general population to radiofrequency electromagnetic fields (RF-EMF). Previous studies have shown that exposure of microorganisms to RF-EMFs can be associated with a wide spectrum of changes ranged from the modified bacterial growth to the alterations of the pattern of antibiotic resistance. Our l...

background : substantial evidence indicates that exposure to electromagnetic fields (emf) above certain levels can affect human health through triggering some biological responses. according to who, short-term exposure to emf at the levels present in the home/environment do not cause any apparent detrimental effects in healthy individuals. however, now, there is a debate on whether long-term ex...

On the one hand, all the existing blind second-order identiication methods backing on wide-sense stationarity lead to consistent estimates as soon as the statistics of the noise are known up to a constant factor; of course, the contexts where jammers may corrupt the data do not in general lead to a consistent estimation of the system. On the other hand, many received signals exhibit cyclostatio...

Because of the proliferation of wireless technologies, jamming in wireless networks has become a major research problem due to the ease in blocking communication in wireless networks. Jamming attacks are a subset of denial of service (DoS) attacks in which malicious nodes block legitimate communication by causing intentional interference in networks. To better understand this problem, we need t...

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 ...

Wireless communication systems, such as wireless sensor networks and RFIDs, are increasingly adopted to transfer potential highly sensitive information. Since the wireless medium has a sharing nature, adversaries have a chance to eavesdrop confidential information from the communication systems. Adding artificial noises caused by friendly jammers emerges as a feasible defensive technique agains...

In this paper, an anti-jamming method, which turns the single objective optimization problem into a multi-objective optimization problem by utilizing 2-norm, is proposed. The proposed jamming suppression method can reduce the wide nulls and wrong nulls problems, which are generated by the common adaptive nulling methods. Therefore a better signal-noise-ratio (SNR) can be achieved, especially wh...