This book is an outgrowth of the pioneering development work done by InterDigital Com- munication Corporation in 3rd Generation TDD WCDMA Technology. Many engineers and managers were involved in this development, which spanned a wide range of tech- nology areas, including system architecture, radio interface, radio modem design, radio resource management and hardware/software implementation. In addition, TDD WCDMA technology had many direct and indirect contributors across the globe in the context of the development of the 3GPP TDD WCDMA Standard.
上傳時間： 2020-06-01
上傳用戶：shancjb
Wirelesscommunications,especiallyinitsmobileform,hasbroughtusthefreedomofmobility andhaschangedthelifestylesofmodernpeople.Waitingatafixedlocationtoreceiveormakea phone call, or sitting in front of a personal computer to send an e-mail or download a video program, has become an old story. Nowadays it is commonplace for people to talk over a cell phonewhilewalkingonthestreet,ortodownloadandwatchamoviewhiletravelingonatrain. Thisisthebenefitmadeavailabletousbythesuccessfulevolutionofwirelesscommunications over three generations, with the fourth generation being under way.
標(biāo)簽： Communications Management Wireless resource
上傳時間： 2020-06-01
上傳用戶：shancjb
The explosion in demand for wireless services experienced over the past 20 years has put significant pressure on system designers to increase the capacity of the systems being deployed. While the spectral resource is very scarce and practically exhausted, the biggest possibilities are predicted to be in the areas of spectral reuse by unlicensed users or in exploiting the spatial dimension of the wireless channels. The former approach is now under intense development and is known as the cogni- tive radio approach (Haykin 2005).
標(biāo)簽： Multi-Antenna Wireless Channels Modeling
上傳時間： 2020-06-01
上傳用戶：shancjb
HIS IS THE THIRD —and most likely the last—book in the series on information technology for energy managers and web based energy infor- mation and control systems. This book concentrates on web based enterprise energy and building automation systems, and serves as a capstone volume in this series. The thrust here is that the highest level functions of a building and facility automation system are provided by a web based EIS/ECS system that provides energy management, maintenance management, overall facility operational management, and ties in with the enterprise resource management system for the entire facility or the group of facilities being managed. If there were ever to be a fourth volume in this series, it would follow the logical progression of the first three volumes, and would probably be titled Web Based Enterprise resource Management Systems.
標(biāo)簽： Enterprise Energy Based Web
上傳時間： 2020-06-06
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.
標(biāo)簽： Cognitive Networks Radio
上傳時間： 2020-06-07
上傳用戶：shancjb
Internet-“冷戰(zhàn)”的產(chǎn)物-1957年10月和11月，前蘇聯(lián)先后有兩顆“Sputnik”衛(wèi)星上天-1958年美國總統(tǒng)艾森豪威爾向美國國會提出建立DARPA（Defense Advanced Research Project Agency），即國防部高級研究計劃署，簡稱ARPA-1968年6月DARPA提出“資源共享計算機(jī)網(wǎng)絡(luò)”（resource Sharing Computer Networks），目的在于讓DARPA的所有電腦互連起來，這個網(wǎng)絡(luò)就叫做ARPAnet，即“阿帕網(wǎng)”，是Interne的最早雛形早期的ARPAnet使用網(wǎng)絡(luò)控制協(xié)議（Network Control Protocol，NCP），不能互聯(lián)不同類型的計算機(jī)和不同類型的操作系統(tǒng)，沒有糾錯功能1973年由Kahn和Vinton Cerf兩人合作為ARPAnet開發(fā)了新的互聯(lián)協(xié)議。1974年12月兩人正式發(fā)表第一份TCP協(xié)議詳細(xì)說明，但此協(xié)議有信包丟失時不能得到有效的糾正TCP協(xié)議分成了兩個不同的協(xié)議：-用來檢測網(wǎng)絡(luò)傳輸中差錯的傳輸控制協(xié)議TCP-專門負(fù)責(zé)對不同網(wǎng)絡(luò)進(jìn)行互聯(lián)的互聯(lián)網(wǎng)協(xié)議IP從此TCP/IP協(xié)議誕生1983年ARPAnet上停止使用NCP，互聯(lián)網(wǎng)上的主機(jī)全部使用TCP/IP協(xié)議，TCP/IP協(xié)議成為Internet中的“世界語”
標(biāo)簽： TCP-IP
上傳時間： 2022-06-23
上傳用戶：
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