Wireless Personal Communications: An International Journal

This paper presents adaptive per-spatial stream power allocation algorithms for Single User Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (SU MIMO-OFDM) systems. Three efficient and low-complexity Greedy Power Allocation (GPA)...

Connectivity in vehicular traffic environment has witnessed significant attention due to the direct impact on the performance of most of the traffic safety applications of intelligent transport system. Various parameters such as density, speed, ...

Providing successful data collection in transmitter-initiated wireless sensor networks with mobile Sink (WSN-MS) scenarios is a primary goal of a myriad of critical applications in real world. Unfortunately, the problem of broken links which may occur ...

In recent years, assistive technology has been an emerging area of research to improve the quality of life, especially for the disabled and elderly people. In this paper, a novel electro-oculogram (EOG) signal based assistive visible light communication ...

The real-time broadcast of multimedia contents such as VoIP and video traffics in recent cellular networks is increasingly becoming common. In this regard, LTE networks with the objective of providing high speed data along with QoS assurance have been ...

Vehicular ad-hoc network (VANET) is characterized as a highly dynamic wireless network due to the dynamic connectivity of the network nodes. To achieve better connectivity under such dynamic conditions, an optimal transmission strategy is required to ...

In this paper obfuscation techniques used by novel malwares presented and compared. IAT smashing, string encryption and dynamic programing are explained in static methods and hooking at user and kernel level of OS with DLL injection, modifying of SSDT ...

Wireless LANs are an integral part of todays globalized economy. WLANs are growing and so are their threats. The main security threat in a wireless network is a malicious or rogue access point (RAP). It is also observed that out of total available ...

In big data systems, data are assigned to different processors by the system manager, which has a large amount of work to perform, such as achieving load balances and allocating data to the system processors in a centralized way. To alleviate its load, ...

In this paper a variable gain low noise amplifier (VG-LNA) is designed and analyzed for X band in 0.18 µm CMOS technology. A two-stage structure is utilized in the proposed VG-LNA and its gain, which is controlled by an on-chip voltage (Vcnt), has ...

A green cellular technology is proposed to optimize the energy and spectrum resources. Such optimization will require perfect channel state information at the transmitting base station. However, reporting the channel status of the entire bandwidth ...

Magnetic induction applications mostly rely on resonance for inducing maximum magnetic fields to system loads and hence for each resonant frequency dedicated circuits are required. Unfortunately, the frequency responses of such inductive systems ...

With quad-notched band characteristic, a compact ultra-wideband (UWB) multiple-input-multiple-output antenna is proposed in the article. There are two identical monopole elements in the system. By inserting symmetrical L-shaped slots, complementary ...

As one part of our life, there are many different types of security threats in social network, and the virtual assets of social networking users has become the attack target. It is of great importance to use security patches in social network to offset ...

This paper addresses the problem of optimal resource allocation in a multi-hop cognitive radio networks. The objective of the present work is to search for the shortest possible path from the source to the destination and explores the scope of the ...

In this paper, we study the minimum free distance and error performance of turbo encoders with Möbius interleavers. In order to be capable of estimating the minimum free distance of these interleavers using binary-fixed point (BFP) algorithm, new ...

This study proposes an uncooperative-multi-cell-multiple-input---multiple-output system to increase the throughput of an ill-conditioned wireless MIMO downlink system. The proposed algorithm suppresses the inter-cell interference at each mobile station ...

The collision prevention system is one of most important research issues on vehicle safety technology. Sending worming messages within the right time and reliable transmission will get prevention of a possible vehicle accident. The communication ...

This paper studies the case of an overlay cognitive radio network where the primary user leases spectral resources to the secondary user in exchange for cooperation, considering that both type of users have specific quality of service requirements. We ...

Spectrum sharing is one of the most important stages in cognitive radio wireless networks, responsible for the opportunistic allocation of free channels to unlicensed users (SUs) to be utilized in data transmission. One of the critical issues at this ...

Cognitive radios have demonstrated its ability in improving spectrum efficiency. Along with the popularity of mobile broadband devices in future mobile communications, research for cognitive radios with mobility will be paid more and more attentions. In ...

Faster development of smart electronic devices in recent years along with significant increase in demanding higher data rates has made cognitive radio networks (CRNs) to be taken into consideration as a promising technology. A CRN has the ability to ...

Recent researches have pointed out that one third persons are aged 65 and above requires special health care. As the number of elderly person is increasing, home monitoring for healthcare applications is playing a vital role in our daily life. Falls are ...

A Single Frequency Network (SFN) reorganization approach for existing DTT networks is introduced that enables the clearing of the Digital Dividend 2 frequencies (694---790 MHz) of the UHF TV spectrum, taking into account the existing services provided ...

Under ultra-wideband indoor channels, the characteristic of fine multipath resolution allows Rake collectors to combine the multipaths as well as to maximize the signal-to-noise ratio effectively. However, the presence of long multipaths in ultra-...

The issues of content placement and content replication for video-on-demand streaming over cellular networks are addressed in this study. Using many replications of a relatively small number of the most popular items a significant performance ...

Wireless sensor network (WSN) is consisted of enormous amount of miniature devices recognized as sensor nodes empowered with sensing, processing, and computing abilities. The main role of WSN is sensing, gathering, and transmission of data to the ...

The Mobile Ad-hoc Network (MANET) is self-healing, infrastructure less network. In which, the Quality of Service (QoS) is the main issue in MANET, for number of real time applications. However, problem of cache is very crucial in reactive routing ...

An efficient multicell coordinated zero-forcing channel feedback scheme is proposed in this paper. The objective of the proposed feedback design is to control the rate of the user by adaptive allocation of feedback bits of each user as a function of ...

In recent years, the demand for spectrum continues to increase with the advent of various wireless communication applications. However, it is a limited resource and cannot be made available beyond a certain extent. Many of the times, licensed spectrum ...