This book is about multipoint cooperative communication, a key technology to overcome the long-standing problem of limited transmission rate caused by inter- point interference. However, the multipoint cooperative communication is not an isolated technology. Instead, it covers a vast range of research areas such as the multiple-input multiple-outputsystem, the relay network, channel state information issues, inter-point RADIO resource management operations, coordinated or joint transmissions, etc. We suppose that any attempt trying to thoroughly analyze the multipoint cooperative communication technology might end up working on a cyclopedia for modern communication systems and easily get lost in discussing all kinds of cooperative communication schemes as well as the associated models and their variations.
標(biāo)簽： Communication Multi-point Cooperative Systems
上傳時(shí)間： 2020-05-31
上傳用戶(hù)：shancjb
his research aims at creating broadband tunable, fully integrated filters for the application of cognitive RADIO and signal classification receivers. The approach under study is the N-path filter technique which is capable of translating a baseband impedance to a reference frequency creating a tunable filter. The traditional N-path filter suffers from fundamental architectural limitations, namely : a trade-off between insertion loss and out-of-band rejection, reference clock feed- through, and jammer power handling limitations. In the first approach, the fundamental trade- off of the traditional N-path filter between insertion loss and out-of-band rejection is improved by a transmission line (T-line) N-path filter technique.
上傳時(shí)間： 2020-05-31
上傳用戶(hù)：shancjb
Rapid growth of wireless communication services in recent decades has created a huge demand of RADIO spectrum. Spectrum scarcity and utilization inefficiency limit the development of wireless networks. Cognitive RADIO is a promising tech- nology that allows secondary users to reuse the underutilized licensed spectrum of primary users. The major challenge for spectrum sharing is to achieve high spectrum efficiency while making non-intrusive access to the licensed bands. This requires in- formation of availability and quality of channel resources at secondary transmitters, however, is difficult to be obtained perfectly in practice.
標(biāo)簽： Opportunistic Spectrum Sharing
上傳時(shí)間： 2020-05-31
上傳用戶(hù)：shancjb
The purpose of this book is to introduce the concept of the Multiple Input Multiple Output (MIMO) RADIO channel, which is an intelligent communication method based upon using multiple antennas. The book opens by explaining MIMO in layman’s terms to help stu- dents and people in industry working in related areas become easily familiarised with the concept. Therefore the structure of the book will be carefully arranged to allow a user to progress steadily through the chapters and understand the fundamental and mathematical principles behind MIMO through the visual and explanatory way in which they will be written. It is the intention that several references will also be provided, leading to further reading in this highly researched technology.
標(biāo)簽： Practical Guide MIMO to
上傳時(shí)間： 2020-05-31
上傳用戶(hù)：shancjb
Wireless means different things to different people. For this book, it refers to the RADIO systems that provide point-to-point, point-to-multipoint, and Earth-space communications over transmission links that propagate outside buildings through the lower atmosphere. Wireless systems are being built that provide data transmission between computers and other devices on one’s own desk. These are part of the wireless world but not the part where, except for interference perhaps, the atmosphere has any influence. The intent of this book is to provide a description of the physical phenomena that can affect propagation through the atmosphere, present sample measurements and statistics, and provide models that system designers can use to calculate their link budgets and estimate the limitations the atmosphere may place on their design.
標(biāo)簽： Communication Propagation Handbook Wireless for
上傳時(shí)間： 2020-05-31
上傳用戶(hù)：shancjb
Thanks for purchasing the RFI Pocket Guide. The purpose of this guide to help you identify, locate and resolve RADIO frequency interference (RFI). It includes some basic theory and measurement techniques and there are a number of handy references, tables, and equations that you may find useful. The focus is to assist both amateur RADIO operators, as well as commercial broadcast and communications engineers, in resolving a variety of common interference issues.
標(biāo)簽： RADIO_Frequency_Interference_Pock et_Guide
上傳時(shí)間： 2020-06-01
上傳用戶(hù)：shancjb
By inventing the wireless transmitter or RADIO in 1897, the Italian physicist Tomaso Guglielmo Marconi added a new dimension to the world of communications. This enabled the transmission of the human voice through space without wires. For this epoch-making invention, this illustrious scientist was honored with the Nobel Prize for Physics in 1909. Even today, students of wireless or RADIO technology remember this distinguished physicist with reverence. A new era began in RADIO Communications.
標(biāo)簽： RADIO Frequency Modulation
上傳時(shí)間： 2020-06-01
上傳用戶(hù)：shancjb
It was only a few years ago that “ubiquitous connectivity” was recognized as the future of wireless communication systems. In the era of ubiquitous connectivity, it was expected that the broadband mobile Internet experience would be pervasive, and seamless connectivity on a global scale would be no surprise at all. The quality of service would be guaranteed no matter when/where/what the users wanted with the connectivity. Connectivity would even be extended to object-to-object communication, where no human intervention was required. All objects would become capable of autonomous communication.
標(biāo)簽： Protocols RADIO LTE-A LTE for and
上傳時(shí)間： 2020-06-01
上傳用戶(hù)：shancjb
Wireless communications and networking technology are advancing at a very rapid pace. Newer technologies and standards are evolving to serve the ever-increasing num- ber of users demanding different types of mobile applications and services. Research and development activities on wireless technology constitute one of the most impor- tant segments of research and development in the telecommunications area today.
標(biāo)簽： Management Resource RADIO
上傳時(shí)間： 2020-06-01
上傳用戶(hù)：shancjb
It is more than a decade since GSM was first commercially available. After some unexpected delay, it seems that finally UMTS is here to stay as a 3G system standardised by 3GPP, at least for another ten years. UMTS will enable multi-service, multi-rate and flexible IP native-based mobile technologies to be used in wide area scenarios and also pave the way for a smooth transition from circuit switched voice networks to mobile packet services.
標(biāo)簽： Management Strategies Resource RADIO
上傳時(shí)間： 2020-06-01
上傳用戶(hù)：shancjb
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