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The aim of this book, the first of two volumes, is to present selected research that has been undertaken under COST Action IC0902 ‘‘Cognitive Radio and Net- working for Cooperative Coexistence of Heterogeneous Wireless Networks’’ (http://newyork.ing.uniroma1.it/IC0902/). COST (European Cooperation in Sci- ence and Technology) is one of the longest-running European frameworks sup- porting cooperation among scientists and researchers across Europe.
上傳時間： 2020-05-26
上傳用戶：shancjb
The idea of writing this book entitled “Cognitive Networked Sensing and Big Data” started with the plan to write a briefing book on wireless distributed computing and Cognitive sensing. During our research on large-scale Cognitive radio network (and its experimental testbed), we realized that big data played a central role. As a result, the book project reflects this paradigm shift. In the context, sensing roughly is equivalent to “measurement.”
標簽： Cognitive Networked Sensing Data Big and
上傳時間： 2020-05-26
上傳用戶：shancjb
This introduction takes a visionary look at ideal Cognitive radios (CRs) that inte- grate advanced software-defined radios (SDR) with CR techniques to arrive at radios that learn to help their user using computer vision, high-performance speech understanding, global positioning system (GPS) navigation, sophisticated adaptive networking, adaptive physical layer radio waveforms, and a wide range of machine learning processes.
標簽： Technology Cognitive Radio
上傳時間： 2020-05-26
上傳用戶：shancjb
Cognitive radio has emerged as a promising technology for maximizing the utiliza- tion of the limited radio bandwidth while accommodating the increasing amount of services and applications in wireless networks. A Cognitive radio (CR) transceiver is able to adapt to the dynamic radio environment and the network parameters to maximize the utilization of the limited radio resources while providing flexibility in wireless access. The key features of a CR transceiver are awareness of the radio envi- ronment (in terms of spectrum usage, power spectral density of transmitted/received signals, wireless protocol signaling) and intelligence.
標簽： Cognitive Wireless Network
上傳時間： 2020-05-26
上傳用戶：shancjb
Cognitive radios have become a vital solution that allows sharing of the scarce frequency spectrum available for wireless systems. It has been demonstrated that it can be used for future wireless systems as well as integrated into 4G/5G wireless systems. Although there is a great amount of literature in the design of Cognitive radios from a system and networking point of view, there has been very limited available literature detailing the circuit implementation of such systems. Our textbook, Radio Frequency Integrated Circuit Design for Cognitive Radios, is the first book to fill a disconnect in the literature between Cognitive Radio systems and a detailed account of the circuit implementation and architectures required to implement such systems. In addition, this book describes several novel concepts that advance state-of-the-art Cognitive radio systems.
標簽： Cognitive Systems Design Radio RFIC for
上傳時間： 2020-06-01
上傳用戶：shancjb
Resource allocation is an important issue in wireless communication networks. In recent decades, Cognitive radio technology and Cognitive radio-based networks have obtained more and more attention and have been well studied to improve spectrum utilization and to overcomethe problem of spectrum scarcity in future wireless com- munication systems. Many new challenges on resource allocation appear in cogni- tive radio-based networks. In this book, we focus on effective solutions to resource allocation in several important Cognitive radio-based networks, including a cogni- tive radio-basedopportunisticspectrum access network, a Cognitiveradio-basedcen- tralized network, a Cognitive radio-based cellular network, a Cognitive radio-based high-speed vehicle network, and a Cognitive radio-based smart grid.
上傳時間： 2020-06-07
上傳用戶：shancjb
隨著人們對于高速無線數據業務的急切需求以及新的無線通信技術的發展，頻譜資源匱乏問題日益嚴重。無線頻譜的緊缺已經成為限制無線通信與服務應用持續發展的瓶頸。認知無線電技術(Cognitive Radio)改變了傳統的固定頻譜分配方式，它以頻譜利用的高效性為目標，允許非授權用戶擇機利用授權用戶的頻譜空洞傳輸數據，以此來解決無線頻譜資源短缺的問題。它是具有自主尋找和使用空閑頻譜資源能力的智能無線電技術。本文的目標是在基于FPGA+DSP的系統硬件平臺上，以軟件編程的方式實現認知無線電數據傳輸的功能。 軟件無線電是實現認知無線電的理想平臺。本文首先闡述了軟件無線電的基本工作原理及關鍵技術途徑，對多速率信號處理中的內插和抽取、帶通采樣、數字下變頻、濾波等技術進行了分析與探討，為設計多速率調制解調系統提供了理論基礎。然后針對軟件無線電的要求給出了基于FPFA+DSP的系統設計硬件框圖，并對其中的部分硬件(FPGA、AD9857、AD9235)做了簡要的描述并給出其初始化過程。在理解基本概念和原理的基礎上，詳細論述了在系統硬件設計平臺上實現的π/4-DQPSK、8PSK、16QAM調制解調技術。本文給出了調制解調系統實現方案中的各個功能模塊(差分編、解碼，加同步頭、內插和成形濾波，下變頻，系統同步等)具體的設計方案和通過硬件編程實現了板級的仿真和最后的硬件實現，并對其中得到的數據進行分析，進一步驗證方案的可行性。最后介紹了通信板同頻譜感知板協同工作原理，依據頻譜感知板獲取的各個信道狀況自適應的選擇π/4-DQPSK、8PSK、16QAM調制解調方式并在FPGA上實現了其中部分功能。
上傳時間： 2013-05-30
上傳用戶：fywz
·認知無線電原理與應用 北京郵電大學出版社 高清PDF內容簡介近幾年來，國際學術界和IEEE標準化組織愈來愈對認知無線電（Cognitive Radio，CR）技術感興趣，稱其為未來無線通信領域的“下一個大事件”（Next Big了hing）。本書通過5章內容來闡述認知無線電及實現認知無線電的代表性技術途徑，介紹超寬帶認知無線電和IEEE 802.22標準。第1章主要介紹Mitola提出的認知無線電
標簽： 認知無線電
上傳時間： 2013-06-19
上傳用戶：prczsf
In this paper, we describe the development of a mobile butterfly-watching learning (BWL) system to realize outdoor independent learning for mobile learners. The mobile butterfly-watching learning system was designed in a wireless mobile ad-hoc learning environment. This is first result to provide a Cognitive tool with supporting the independent learning by applying PDA with wireless communication technology to extend learning outside of the classroom. Independent learning consists of self-selection, self-determination, self-modification, and self-checking.
標簽： butterfly-watching development describe learning
上傳時間： 2014-11-26
上傳用戶：waizhang
認知無線電一些參考資料，很有借鑒價值。 Cognitive radio
上傳時間： 2014-01-01
上傳用戶：playboys0
