1.1 Abstract Packetized speech transmission systems implemented with Voice over IP are gaining momentum against the traditional circuit switched systems despite the fact that packet switched VoIP is two to three times less efficient then its circuit switched counter part. At the time same time it is supporting just a rather bad “toll” quality. We believe that it is time to for a new architectur...

Abstract – This paper proposes a novel test circuit for SiC transistors. On-state resistance under practical application conditions is an important characteristic for the device reliability and conduction efficiency of and SiC transistors. In order to measure the on-state resistance in practical applications, high voltage is needed, and high current is also necessary to ignite performance for t...

INTRODUCTION With the explosive growth of cellular voice services in the past few years, it is expected that there will be a tremendous demand for wireless data service in the future. When the medium that people use to access to the Internet changes from wireline to wireless networks, many protocols that were originally developed in the wireline environment will face the new challenges unique t...