We obtained results on the capacity of a mobile MIMO channel and on the influence of the user. Measurements were done in a configuration with three distributed transmitters equipped with single antennas and with a small wireless handset with four antennas, creating a 4Rx x 3Tx configuration. We express the quality of the radio channel in terms of the Effective Degree of Freedom (EDOF)[1]. From ...

To date, the majority of mobile network operator (MNO) customers have not used mobile Internet (MI) offerings. Therefore, it is important to gain a better understanding of (1) how MNO customers perceive MI attributes, (2) how these perceptions are related to MI acceptance, and (3) the extent to which these judgments differ as a function of an individual’s adoption status (actual compared to pot...

In this letter, a compact planar ultra-wideband mobile antenna with L-shaped extended ground stubs is presented. The proposed handset antenna consists of two planar meandered monopole radiating elements, i.e., main antenna and auxiliary antenna respectively, located at the diagonal corners of mobile phone printed circuit broad with standard size of 136 × 68mm2. Each radiating element is compose...

This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the co...

helsinki university of technology abstract of the master's thesis As smartphones are becoming more common as end-user devices in mobile networks , new advanced mobile services are made accessible to a growing number of users. This broadening user base, however, exhibits a range of distinct needs, characteristics and behavior and therefore a single product or service cannot be expected to satisf...

Use of mobile equipment has increased exponentially over the last decade. As use becomes more widespread so too does the demand for new functionalities. The limited memory and computational power of many mobile devices has proven to be a challenge resulting in many innovative solutions and a number of new standards. Despite this, there is often a requirement for additional enhancement to improv...

A number of approaches for capturing and processing location information of mobile users have been proposed in the past; however, only with the latest advances in the handset technology, a terminal-based positioning approach, using overlay SIP signaling on top of a packet switched bearer and area notification as basic functionality becomes feasible for mass applications. Especially in electroni...

In this paper we analyze a large-scale comprehensive dataset from a major European Mobile Phone Provider (EURMO). This dataset allows us to study the diffusion of the iPhone 3G. We provide evidence of contagious adoption. We show that the propensity for iPhone 3G adoption increases with the number of individuals within the social network that have previously purchase the iPhone. We bound the im...

Short Message Service (SMS) is a popular form of nonverbal mobile communication. To date, most research has focused upon the use of SMS by teenagers and young adults. Our work examines the use of SMS by middleaged users. We conducted a usability study evaluating the ease of use or difficulties experienced by middle-aged individuals whilst engaging in text message objectives and SMS tasks, in ea...

With the introduction of third generation phones, a technological transition is occurring in which the devices begin to have similar functionality to that of current personal digital assistants. The ability of these phones to store sensitive information, such as financial records, digital certificates and company records, makes them desirable targets for impostors. Current security for mobile p...