ST journal of system research. Wireless Communications 0

Год: 2004
Количество страниц: 125
Язык: Английский
Формат: PDF / RAR

Формат файла: RAR

In the very dynamic field of wireless communications, an increasing number of technologies have established themselves on the market. Even more systems and technologies are on their way from the research laboratories to broader deployment in real life products. The most popular wireless communication device as of today is clearly the well-known digital mobile radio based on second-generation mobile radio standards. In the last ten years, mobile phones have become well accepted as an integral part of our daily life. This technology represents a first step towards the vision of communicating everything, everywhere at anytime. The development of other systems shows that we are indeed on the move towards a wireless world!
This ST Journal issue on Wireless Communications focuses on this broad field of system research and development. Ten papers authored by experts in the field present several aspects of wireless communications, starting with an overview of the low chip rate TDD mode and ending with the presentation of a CDMA-based Multiple Access technique for a UWB WPAN impulse radio system. The papers provide insight into existing systems like UMTS as well as potential future wireless systems and technologies such as the MC-CDMA based cellular system. In addition to STMicroelectronics' internal authors, the writers here include external contributors with links to the STMicroelectronics internal system research community.
The first three papers present an overview, the first offering a description of the 3GPP low chip rate TDD mode, similar to the Chinese TDD mode. The paper is a contribution from our Singapore colleagues Chris Aldridge, Ser Wah Oh, and Muralidhar Karthik. The second paper provides an overview of the European project MATRICE on MC-CDMA for future cellular radio systems. The authors are all participants in the project. The last paper in this section, written by Flavio Lorenzelli and Massimiliano Siti, dedicates itself to the subject of Space-Time processing and coding in general.
The next three papers present a deeper insight into aspects of the third generation UMTS mobile radio system. The contribution of the Politecnico di Milano team provides a closer look at the
performance evaluation of packet services in UMTS. The two other papers are more related to the implementation and the architecture of a UMTS terminal. The paper "A UMTS-FDD Cell Search Engine" by the STMicroelectronics development team of Nicolas Darbel in San Diego describes the first steps in the synchronization and the corresponding architecture of a UMTS terminal. The paper on code generation in Wideband CDMA from the STMicroelectronics Lab in Catania offers a novel approach for the basic CDMA code generation in such a terminal. The last four papers relate to the emerging technologies and architecture solutions for future wireless systems. This section of papers starts with the presentation of a patented flexible high throughput Turbo-Decoder architecture, the result of collaboration between STMicroelectronics and the Microelectronics System Design Research Group of the University of Kaiserslautern in Germany, headed by Prof. Norbert Wehn. The next paper by Miguel Kirsch from STMicroelectronics introduces an original algorithm for the estimation of the mobile terminal speed using the normalized autocovariance function. The third paper by Frederic Lehmann discusses the optimization of product codes for use in wireless ATM applications. The closing paper of this research issue, authored by Gian Mario Maggio, David Laney and Frederic Lehmann, discusses a multiple access technique of an emerging transmission technology called Ultra Wide Band (UWB). This issue offers a very brief peek into the exciting field of existing and future wireless systems and techniques. In the future, many more new ideas will float into the research domain, develop quickly for the mass market, and thus be made available to the consumer. In the next years, wireless technologies will change our lives at an even more accelerated pace, providing challenging opportunities and tasks to the system research community.