This document does not contain technology or technical data controlled under either the U.S. International Traffic in Arms Regulations or the U.S. Export Administration Regulations. With the development and widespread use of wireless devices in recent years (mobile phones, Internet of Things, Wi-Fi), the electromagnetic spectrum has become extremely crowded. In order to counter security threats...

This paper aims at investigating the superiority of power allocation strategies, based on calculus of variations in a point-to-point two-way relay-assisted channel incorporating the amplify and forward strategy. Single and multilayer coding strategies for two cases of having and not having the channel state information (CSI) at the transmitters are studied, respectively. Using the notion of cal...

We analyze the error performance of distributed space-time codes in a wireless system with multiple cooperating transmitters and a single receiver. Due to the distributed nature of the system, the transmitted signals are subject to different average path losses. As our analysis shows, this effect leads to reduced diversity gains. We explain this result on the basis of an interesting duality bet...

sheikh murtaza ansārai is regarded as one of the greatest imamite jurists, and one of the prominent scholarly and juristic figures of the last centuries. his proficiency, originality and gumption are evident in his surviving works regarding problems in principles (usūl) and traditional-demonstrative jurisprudence. his precious researches on “investigation and criticism of chain of transmission ...

Adrenergic, cholinergic, and a variety of peptide neurotransmitters are known to modulate Ca currents in peripheral neurons. Using a protocol that allows for simultaneous assessment of effects on dihydropyridine (DHP)-sensitive and DHP-insensitive current components, we compared the actions of norepinephrine (NE), bethanechol (BeCh), and neuropeptide Y (NPY) on Ca currents in neonatal rat super...

MIMO systems have raised a lot of interest in the recent years. The radar community pointed out the multiple advantages of MIMO systems such as diversity gain for target detection, angle of arrival and Doppler estimation. Coherent processing also allows super-resolution for target localisation. We explore in this paper broadband MIMO sonar systems. In the current literature, the channel matrix ...