The current generation of wireless transceivers, for applications ranging from personal area networks to mobile handsets, incorporates two predominant receiver architectures that can offer significantly different benefits depending upon the system requirements. Utilizing either a direct conversion or a digital low-IF architecture, the latest GSM transceivers cleverly eliminate the second analog...

iStuff Mobile is a rapid prototyping platform that helps explore novel interactions that combine sensor enhanced mobile phones and interactive spaces. The toolkit includes sensor network platforms, mobile phone software, and a proven rapid prototyping framework. Interaction designers can use iStuff Mobile to quickly create and test novel interactions without making internal hardware modificatio...

A new broadband multiple-input multiple-output (MIMO) antenna with good isolation and compact size is proposed. The proposed antenna consists of two G-shaped elements in the upper layer and two inverted L protrude branches and a T slot etched in ground which is used to reduce the mutual coupling. This planar antenna has a bandwidth of 100% with |S11| ≤ -10 dB from 2.26GHz to 6.78 GHz. The value...

This paper describes an approach that integrates declarative policies, context, OS level device control, and existing carrier authentication techniques to control access to features of mobile devices for web applications. The approach builds upon a body of existing work and adapts it to the mobile handset scenario.

Mobility will place an efficient role in now days in the wireless communications. Mobile IP and SIP provide the mobility service to the handset users. The problems in Mobile IP and SIP s are triangular, handoff, Intra domain problems. These problems create signal lose and improper signalling to the user. To overcome these we provide add of service to the Mobile IP and SIP with the integration o...

Adaptation and use of an algorithm for recognition of connected words in an application for mobile radio telephony is described. Two data bases were collected in a compact car running about 120 km/h containing speech uttered via handset and in hands-free mode for each 10 speakers. In the first phase, a connected-words recognition algorithm was improved using the handset data base. Starting with...