In this paper, we designed and implemented an internal multi-band folded monopole antenna for mobile handset. The proposed antenna covers Global System for Mobile Communications (GSM900: 880~960 MHz), Digital Communications System (DCS: 1710~1880 MHz), USPersonal Communications Service (US-PCS: 1850~1990 MHz), Bluetooth(2400~2484 MHz), WiMAX(3400~3600 MHz), and Wireless Local Area Network (WLAN...

While customer segmentation for mobile services is typically based on demographics and reported use, smartphone measurement software enables to add directly observed user behavior. This explorative paper develops customer segmentation on relevant metrics from the perspective of network operators, handset manufacturers, and application developers. We analyze the results of a smartphone measureme...

During the past few years, the mobile prepaid service has been growing exponentially all over the world. Four approaches have been proposed to provide mobile prepaid service. We describe these approaches and compare their strength and weakness. Our analysis indicates that the handset based approach is a low cost, high risk solution. The wireless intelligent network approach is a high cost, low ...

Silicon integration has delivered tremendous cost, space and power savings across a wide variety of consumer electronics products, enabling handset designers to meet strong demand for more highly integrated wireless semiconductor solutions capable of providing new voice, data and multimedia capabilities without increasing the size, cost or power requirements of next-generation mobile handsets. ...

Android, originally meaning “robot”, is a mobile operating system using a modified version of the Linux kernel. It was initially developed by Android Inc., a firm later purchased by Google,[?]and lately by the Open Handset Alliance[?]. It allows developers to write managed code in the Java language, controlling the device via Google-developed Java libraries.[8] It empolys the software stack arc...

The integration of accelerometers and gyroscopes has successfully reached a point where consumer devices can readily incorporate motion while beginning to meet cost, size, robustness, and battery life targets. As consumer electronics companies continually search for the next differentiating product functionality, they are increasingly adopting motion in gaming, mobile handset, digital still cam...

An important characteristic of a mobile handset is its ability to receive and transmit power. One way to characterize the performance of a handset in this respect is to use measurements of the spherical radiation pattern from which the total radiated power (TRP), total isotropic sensitivity (TIS), and mean effective gain (MEG) can be computed. Often this kind of measurements are made with a pha...

In this paper, we present a new approach to handset identification using Support Vector Machines (SVMs) [1]. The inconsistency of audio characteristics among different handsets significantly degrades the performance of speaker recognition [2]. If a speaker recognizer can identify the handset a speaker is using, it can perform the recognition by selecting a model trained specifically on that han...