In this paper, the authors propose Airshark – a system that detects multiple non-WiFi RF devices in real-time and using only commodity WiFi hardware. To motivate the need for systems like Airshark, they start with measurement study that characterizes the usage and prevalence of non-WiFi devices across many locations. They, then present the design and ...

A very promising approach for various wireless applications is to use multiple antennas at both transmitter and receiver. The error rate performance and complexity of the algorithms are evaluated for different antenna configurations, for various constellation sizes, for different channel properties with and without coding. It is shown that Maximum Likelihood Detection (MLD) outperforms the ...

The considerable increase of mobile device users in recent years causes a strong demand on secured wireless bank services and reliable mobile commerce (m-commerce) applications. Since mobile payment (m-payment) and banking is a critical part of most wireless information services and mobile commerce applications, how to build secured m-payment systems becomes a research hotspot. This ...

Android mobile operating system, which is based on Linux Kernel 2.6, has open source license and adaptability to user driven applications. As all other operating systems it has all the basic features like process scheduling, memory management, process management, etc., associated with it. Any mobile platform works smoothly when the process scheduling is performed in ...

Learn best practices, practical techniques, and guidelines for designing, planning, & implementing a wireless LAN within a high-density environment such as a university or college campus. These tips can also be applied to other organizations in need of a high-density wireless network worldwide. Subscribe to the Developer Insider Newsletter From the hottest programming languages to ...

Financial payment via mobile phones, mobile payment, as a subset of electronic payments has encountered many challenges regarding security because of public dispersion of mobile phone which increase the possibility of eavesdropping and abusing. Although this problem can be removed by using encryption protocols, however, restrictions in hardware resources of mobile phone such as low ...

While most businesses have continuity plans in place for remaining operational during a disruption, many don’t address a company’s most precious assets: its employees. This paper identifies key areas for organizations to consider as they prepare themselves to handle the human side of business disruptions. Subscribe to the Data Insider Newsletter Learn the latest news ...

In this paper, synthesis of unequally spaced linear antenna arrays based on an Inheritance Learning Particle Swarm Optimization (ILPSO) is presented. In order to improve the optimization efficiency of the PSO algorithm, the authors propose an inheritance learning strategy that can be applied to different topology of different PSO algorithms. In ILPSO algorithm, each cycle ...

Embedded GPS receivers have become commonplace with the proliferation of GPS navigation systems into all but the least expensive vehicle and cell phone lines. As more manufacturers embed low-cost GPS receivers into their products, the need for low-cost GPS signal simulators has also grown. Controlled virtual testing is vital in ensuring the expected system performance. ...

Secure Network has now become a need of any organization. The security threats are increasing day by day and making high speed wired/wireless network and internet services, insecure and unreliable. Now – a – days security measures works more importantly towards fulfilling the cutting edge demands of today’s growing industries. The need is also induced ...

Allocating slots dynamically to the service flows in heterogeneous wireless network is highly complex and non-linear. Since the link quality is continuously changing, a wireless network employing adaptive modulation like WiMAX, allocating slot in such network is based on the link quality. In this paper, the author’s present link aware packet scheduling algorithm using packet’s ...

Planar Sierpinski monopole exhibits a multiband behavior, but its parameters in operation frequency bands are not optimal. By mapping the Sierpinski monopole on a conical surface, a symmetrical Three-Dimensional (3-D) structure is obtained. In this way, a larger bandwidth and a better radiation pattern is achieved. The symmetrical 3D Sierpinski-based monopole is an original contribution ...

Today, Global Navigation Satellite Systems (GNSS), real time differential correction techniques, CORS networks, GNSS user equipments, Wireless Communications and Networking (WCN) systems, cellular systems, mobile navigation and Internet GPS are the systems used for different purposes in scientific, commercial and daily life areas. The latest innovations and developments in these systems play vital role in ...

Parallel rendezvous multi-channel MAC mechanisms are regarded as an efficient method for media access control in cognitive radio networks since they do not need a control channel and use only one transceiver. However, existing parallel rendezvous MAC mechanisms assume that all channels have the same maximum capacity and channel availability for secondary users. In this ...

In this paper, the authors focus their attention in the main two methods of cooperative communications: decode and forward, and amplify and forward and how they can be used in a new concept of cooperative satellite communications. They present an analysis of both in terms of symbol error rate and power allocation and analyze which ...