Introduction:  The  use  of  mobile  communication  systems  has  dramatically  increased  over  the  past  decade. Although many studies have been performed to determine the effect of radio frequency (RF) but  less attention has been paid to the possible biological impact of exposure to extremely low frequency  (ELF) components.   The objective of this study is two folds. One is to design the ...

Radio Frequency (RF) engineers are faced many times with the following two questions: “What are the effects of radio waves on human health?” and, more specifically, “What health risks are associated with the use of cell phones, mobile radios, microwave radios, microwave ovens, broadcast radio and television transmitters, power lines and X-rays?” In recent times, many people have expressed an in...

Cellular networks provide voice and data services to the users with mobility. To deliver services to the mobile users, the cellular network is capable of tracking the locations of the users, and allowing user movement during the conversations. These capabilities are achieved by the location management. Location management in mobile communication systems is concerned with those network functions...

This paper presents an efficient block Schur algorithm for the joint detection of several CDMA codes in third generation mobile radio systems. It can, for instance, be used in time-slotted CDMA mobile radio systems, mobile radio systems using multi carrier CDMA, and direct sequence CDMA systems. After rearranging the system matrix into a block Toeplitz matrix, the proposed block Schur algorithm...

In recent years, there has been an upsurge of interest in multihop-augmented infrastructurebased networks in both industry and academia, such as the seed concept in 3GPP, mesh networks in IEEE 802.16, and coverage extension of HiperLAN/2 through relays or user-cooperative diversity mesh networks. This article, a synopsis of numerous contributions to Working Group 4 of the Wireless World Researc...

Introduction The phenomenal growth in cellular telephony over the past several years has demonstrated the value people place on mobile voice communications. The goal of nextgeneration wireless systems is to enable mobile users to access, manipulate and distribute multimedia content anywhere anytime. New mobile and wireless services will include Internet access to interactive multimedia, video c...

Interference is the major limiting factor when evaluating the performance of cellular radio systems. Sources of interference could be another mobile at the same cell, a call in progress in a neighboring cell or other base stations operating in the same frequency band. Interference on voice channels causes cross talk due to an undesired transmission. On control channels, interference leads to mi...

Outage analysis is one of the primary objectives in the design and operation of the current generations of cellular mobile communications systems, in order to increase spectrum efficiency and meet the quality of service and the grade of service demands. A general and unified semi-analytical approach is presented for the direct evaluation of the outage probability in the presence of L mutually i...

Mobile wireless Internet access services face a problem of mitigating the time-varying, correlated frame losses in fading radio channels. The losses may be compounded by detrimental interactions between separate error recovery mechanisms in the link and transport protocol layers. In this work we investigate by simulations the performance of TCP Reno over IS-707, a radio link protocol standard f...

This paper explores future mobile systems with emphasis on re-configurability based on cognitive and software defined radios. 5G (Fifth Generation) network architecture consisting of reconfigurable multitechnology core and a single fully reconfigurable terminal able to autonomously operate in different heterogeneous access networks is proposed. The proposed network is enforced by nanotechnology...