The need for information access and processing inmobile computing environments presents great challenges to database researchers. Apart from advances in wireless communications and device technology, new data management techniques are needed to provide a transparent interaction between fixed and mobile devices in global information systems. A key aspect is to provide a flexible and powerful tra...

1. FOREWORD This three year project has focused on the development of decentralized algorithms for teams of mobile robots that are to operate using local interaction rules in such a way that desired, global objectives are achieved. In particular, these robots are constrained through limitations on their sensing and communications capabilities. As such, the main problem under consideration is ho...

The Bluetooth radio system is an ideal communications tool for lightweight autonomous mobile robots but little research interest has been targeted at this application. We present in this paper an environment which allows behavior-based autonomous mobile robotic simulation to take advantage of synthetic Bluetooth communications. Two components comprise our system. A highly adaptable mobile robot...

In this paper, the distribution of zeros of mobile channels is investigated and the results obtained are applied to the channel models standardized for the GSM (Global System for Mobile Communications) / EDGE (Enhanced Data Rates for GSM Evolution) system. The taps of the discrete–time overall impulse response can be modeled as correlated complex Gaussian random variables with zero or nonzero m...

We address the problem of blind identification of multiuser multiple-input multiple-output (MIMO) finite-impulse response (FIR) digital systems. This problem arises in spatial division multiple access (SDMA) architectures for wireless communications. We present a closed-form, i.e., noniterative, consistent estimator for the MIMO channel based only on secondorder statistics. To obtain this close...

The localization of handset devices gains more and more importance in various fields, such as advertisement, navigation, safety and also observation and tracking. The accuracy of localization improves by the years and offers more use to mobile applications, which make use of the knowledge of a user’s position. A well-known example of the apply of localization is the E911 mandate in the USA. It ...

The paper presents an overview of the mobile communications industry. Many aspects of the industry are analysed including the importance of mobile communications, brief history of the industry and mobile applications such as mobile phones, satellites, other handheld devices, wireless computing and m-commerce. The competitive landscape of the mobile phone market is explored based on competing pr...

It is generally believed that exploitation of Global Satellite Navigation Satellite System (GNSS) together with advanced mobile communications for signalling and train control will significantly improve safety and efficiency of railway operations. This is especially true for signalling solutions on low traffic lines and also on some long heavy haul lines where previously planned implementations...

According to space constraints of the traditional agricultural environment monitoring system, a small database called SQLite was transplanted into the ARM and Linux operation which could store and manage the field information. Users can get information anytime and anywhere through the GSM (Global System for Mobile Communications)network and the WSN(Wireless Sensor Network) by this design, inste...