Unobtrusive determination of an intruding vehicle's length is useful for threat assessments in perimeter surveillance, law enforcement, and antiterrorism applications. We describe a passive radar architecture wherein broadcast signal from cellular mobile communication system radio transmitter bistatically scattered by moving vehicle received processed software-defined platform. Measurement the ...

In this work, we consider device-to-device (D2D) direct communication underlaying a 3GPP LTE-A network. D2D communication enables new service opportunities, provides high throughput and reliable communication while reducing the base station load. For better total performance, D2D links and cellular links share the same radio resource and the management of interference becomes a crucial task. We...

A fundamental question in a wireless cellular system is how to allocate base stations, radio transceivers, and channels in an efficient manner. This question becomes difficult when operators must react to burgeoning demand. This paper explores a pure ad hoc approach where call requests are given the first available channel that meets signal quality requirements, radio transceivers are added imm...

The problem of multi-user radio resource scheduling on the downlink of a Long Term Evolution (LTE) cellular communication system is addressed in this paper. The optimization model used imposed that the radio resources for multiple users are jointly allocated at the air-interface. The study shows that optimal and near optimal solutions to such a problem may provide reasonable gain over a simply ...

We consider Downlink (DL) scheduling for a multi-user cooperative cellular system with fixed relays. The conventional scheduling trend is to avoid interference by allocating orthogonal radio resources to each user, although simultaneous allocation of users on the same resource has been proven to be superior in, e.g., the broadcast channel. Therefore, we design a scheduler where in each frame, t...

Research department at Encsson Radw Systems. igital cellular andmicrocellularradio systems must incorporate multiple accessschemes that make efficient use of the allocated bandwidth and radio cell infrastructure with minimum cost and maximum performance 111. Time Division M u l l i ~ l e Access (TDMA) is thk multiple access techn6ue of choice for several digital cellular and PCS systcms. For ex...

Due to the increasing number of car-centered connected services, making efficient use limited radio resources is critical in vehicular communications. Hybrid networks dispose multiple Radio Access Technologies (RATs) like cellular and vehicle-to-vehicle (V2V) networks, with complementary characteristics that allow for developing smarter network traffic distribution methods. This paper proposes ...

Radio resources in wireless communication systems, implementing different multiple access techniques, must be wisely managed. This perspective is pivotal since the variations in propagation channel are very fast. This complexity in the cellular system periodically contributes to different interference levels, high or low, resulting in the degradation of the system capacity. Transmitter power co...

abstract purpose of this paper: the objectives of this paper are two folds: (1) utilizing hierarchical fuzzy technique for order preference by similarity to ideal solution (topsis) approach to evaluate the most suitable rfid-based systems decision, and (2) to highlight key risks and benefits of radio frequency identification technology in healthcare industry. design/methodology/approach: resear...

In this paper, we consider the perfonnance of a cellular radio, : direct sequence, code division multiple access system. We analyze the performance of the mobile-to-base link, and we use a model corresponding to independent flat Rayleigh fading of each user.