Transmission media: microwave, millimeter-wave, THz wave, and lightwave in fibers with Tetsuya Kawanishi

Wired and Wireless Seamless Access Systems for Public Infrastructure by Tetsuya Kawanishi provides comprehensive and detailed information on wired and wireless seamless access systems consisting of a wide variety of transmission media such as microwave, millimeter-wave, THz wave, and lightwave in fibers. The wired and wireless seamless access system can be used in transportation infrastructures, such as high-speed rails and airport runways. The number of the antenna units required for future radio services including beyond 5G would be larger than population.

Optical fiber links are the most important transmission media to construct core of information networks. Other media including radio systems would be last hops or bridges for many small antenna units, where media converters should be placed on borders between different kinds of media. In addition, waveform transfer would be very important to make seamless links consisting of wired and wireless connections. We focus on two important features of seamless access systems. The first one would be high-capacity transmission by optical fibers and wireless links. The other feature is low-latency transmission. Latency would have significant impact on particular applications such as financial transactions, online gaming. Low-latency data transfer is very important for self-driving cars as well. In future networks, sensing would be a part of networks and some networks act as high-performance sensors. This book provides a concept of sensor-over-fiber, where many antenna units are connected through optical fibers to gather sensor responses coherently.

Through 4G or 5G mobile systems, radio and optical technologies are penetrating into our daily life. In addition, public transport infrastructures such as airports, high-speed rails and highways require high-speed and dependable communication and sensing networks. In the past, precise clocks and high-performance radio transmission had been developed for maritime transportation, Now, aviation relies on navigation systems and sensing system using radio-waves. As you may know, the GPS uses atomic clocks. To enhance the safety and efficiency of public transportation, we need seamless access networks consisting of many antenna units connected by various transmission media, including microwave, millimeter-wave and optical waves. Selection of transmission media depends on the use case. This book tries to describe how to optimize the seamless access networks consisting of various transmission media, and how to enhance the performance in transmission capacity and in latency. Systems and devices dedicated for public transportation infrastructures where high-performance and dependable data links are required will be applied to beyond 5G networks which will be used in daily life. Thus, the contents in this book will be useful for professionals of public transportation systems and as well as for engineers who are interested in future mobile systems such as beyond 5G or 6G.

What are 3-5 problems this book can help technical professionals solve:

How to optimize heterogeneous networks consisting of optical fibers, microwaves, millimeter-waves and THz waves.

How to select transmission media for particular application such as airport safety.

How to design high performance access systems.

How to estimate power consumption of transmission systems.

What are features of this book, and the benefit to readers:

Basic knowledge on radio and optical transmission technologies can be provided comprehensively. In conventional books, we have to read at least two books one for radio another is for optical fibers. In addition, description of signals has some difference in optical and radio technologies, so the readers should translate the technical terms by themselves. On the other hand, in this book, the readers can get comprehensive knowledge, through a coherent way.

This book provides some basic theories and ideas of seamless access networks, as well as some practical application examples. So, the readers can easily understand how systems works.

This book describes basic communication theory such as Shannon’s theorem, by a quite unique explanation to offer a physical interpretation of the transmission capacity limit. Such information is useful for professors and students in Electronics, Computer Science, etc.

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