Mobile communications and belongings: Cape Verdeans in Portugal

Merger Simulation in Mobile Telephony in Portugal

This article assesses the unilateral effects on prices of a merger in the Portuguese mobile telephony market. We use aggregate quarterly data from 1999 to 2005 and a nested logit model to estimate the price elasticities of demand and the marginal costs of subscription of mobile telephony. Given these estimates, we simulate the effects of the merger. We find that the available mobile telephony s...

Wireless and Mobile Communications

Figure 1 gives a rough overview of some prominent wireless communication systems focusing on the two parameters gross data rate and relative speed between sender and receiver. Assuming a mobile end-user connected to a stationary transceiver station, the points on the (non proportional) speed axis resemble nonmoving persons, pedestrians, cars downtown, cars outside cities, and cars on a highway,...

VLSI in Mobile Communications

In recent years, the demand for mobile operation of all types of electronic systems has become significant. It seems that by merely providing the same functionality of a desktop system in a mobile unit, a significant market advantage can be obtained for virtually any electronic function. Consumer electronics companies have been highly successful by creating portable televisions, video tape reco...

Sustainable Mobile Computing and Communications

Mobile and Wireless Communications Security

This article presents an overview of security issues for mobile and wireless communications. It describes the security requirements and architectural options for these networks. Subsequently three technologies are discussed in more detail: mobile phones (GSM and 3GSM), Wireless LAN (IEEE 802.11) and Personal Area Networks (Bluetooth). A critical evaluation is given of the strengths and weakness...