The first Third Generation Partnership Project (3GPP) Wideband Code Division Multiple Access (WCDMA) networks were launched during 2002. By the end of 2005 there were 100 open WCDMA networks and a total of over 150 operators having frequency licenses for WCDMA operation. Currently, the WCDMA networks are deployedinUniversalMobileTelecommunicationsSystem(UMTS)bandaround2GHz in Europe and Asia including Japan and Korea. WCDMA in America is deployed in the existing 850 and 1900 spectrum allocations while the new 3G band at 1700/2100 is expected to be available in the near future. 3GPP has defined the WCDMA operation also for several additional bands, which are expected to be taken into use during the coming years.
標簽： HSDPAHSUPA Access Speed Radio UMTS High for
上傳時間： 2020-05-27
上傳用戶：shancjb
Software Radio (SR) is one of the most important emerging technologies for the future of wireless communication services. By moving radio functionality into software, it promises to give flexible radio systems that are multi-service, multi- standard, multi-band, reconfigurable and reprogrammable by software. Today’s radios are matched to a particular class of signals that are well defined bytheircarrierfrequencies,modulationformatsandbandwidths.Aradiotransmitter today can only up convert signals with well-defined bandwidths over defined center frequencies, while, on the other side of the communication chain, a radio receiver can only down convert well-defined signal bandwidths, transmitted over specified carrier frequencies.
上傳時間： 2020-06-01
上傳用戶：shancjb
Part I provides a compact survey on classical stochastic geometry models. The basic models defined in this part will be used and extended throughout the whole monograph, and in particular to SINR based models. Note however that these classical stochastic models can be used in a variety of contexts which go far beyond the modeling of wireless networks. Chapter 1 reviews the definition and basic properties of Poisson point processes in Euclidean space. We review key operations on Poisson point processes (thinning, superposition, displacement) as well as key formulas like Campbell’s formula. Chapter 2 is focused on properties of the spatial shot-noise process: its continuity properties, its Laplace transform, its moments etc. Both additive and max shot-noise processes are studied. Chapter 3 bears on coverage processes, and in particular on the Boolean model. Its basic coverage characteristics are reviewed. We also give a brief account of its percolation properties. Chapter 4 studies random tessellations; the main focus is on Poisson–Voronoi tessellations and cells. We also discuss various random objects associated with bivariate point processes such as the set of points of the first point process that fall in a Voronoi cell w.r.t. the second point process.
標簽： Stochastic Geometry Networks Wireless Volume and
上傳時間： 2020-06-01
上傳用戶：shancjb
Software-defined radios (SDRs) have been around for more than a decade. The first complete Global Positioning System (GPS) implementation was described by Dennis Akos in 1997. Since then several research groups have presented their contributions. We therefore find it timely to publish an up-to-date text on the sub- ject and at the same time include Galileo, the forthcoming European satellite- based navigation system. Both GPS and Galileo belong to the category of Global Navigation Satellite Systems (GNSS).
標簽： A_Software-defined_GPS_and_Galile o_Receiver
上傳時間： 2020-06-09
上傳用戶：shancjb
The Verilog Hardware Description Language (HDL) is defined in this standard. Verilog HDL is a formal notation intended for use in all phases of the creation of electronic systems. Because it is both machine readable and human readable,it supports the development,verification, synthesis,and testing of hardware designs; the communication of hardware design data; and the maintenance,modification,and procurement of hardware. The primary audiences for this standard are the implementors of tools supporting the language and advanced users of the language.
上傳時間： 2021-11-09
上傳用戶：
SDN （Software defined Networking）作為當前最重要的熱門技術之一，目前已經普遍得到大家的共識。有關SDN的資料和書籍非常豐富，但入門和學習SDN依然是非常困難。本書整理了SDN實踐中的一些基本理論和實踐案例心得，希望能給大家帶來啟發，也歡迎大家關注和貢獻。本書內容包括網絡基礎SDN網絡容器網絡Linux網絡OVS以及DPDKSD-WANNFV實踐案例
上傳時間： 2021-12-09
上傳用戶：
5G中的SDN-NFV和云計算.pdf摘 要 通過介紹廣義的SDN/NFV和云計算，結合未來5G網絡的特點，分析了5G中上述技術的 應用前景和技術定位；結合5G的網絡特點和現有網絡的部署情況，總結了各技術間的邏輯關系以及運 營商的側重點。引言 SDN/NFV 和云計算都是起源于 IT 領域的技術。 如今，云計算已經非常成熟，在 IT 領域已經大規模商 用，SDN技術作為新興的轉發技術，也已經被谷歌等互 聯網巨頭部署在多個數據中心。隨著虛 擬化技術的發展，人們試圖將更多的專有 設備虛擬化和軟件化，從而達到降低成本 和靈活部署的目的，于是 NFV 的概念誕 生了。本文將結合廣義上 3 種技術本身 的特點和未來5G的網絡能力要求，分析 各技術在5G架構中的技術定位和前景， 同時結合實際的發展情況，總結未來運營 商在技術研發和業務模式上的側重點。 1.1 廣義的SDN及標準化進程 ONF 在 2012 年 4 月 發 布 白 皮 書 《Software- defined Networking: The New Norm for Networks》
標簽： 5G
上傳時間： 2022-02-25
上傳用戶：jason_vip1
Compact PCI（Compact Peripheral Component Interconnect）簡稱CPCI，中文又稱緊湊型PCI，是國際工業計算機制造者聯合會（PCI Industrial Computer Manufacturer's Group，簡稱PICMG）于1994提出來的一種總線接口標準。是以PCI電氣規范為標準的高性能工業用總線。為了將PCI SIG的PCI總線規范用在工業控制計算機系統，1995年11月PCI工業計算機制造者聯合會（PICMG）頒布了CPCI規范1.0版，以后相繼推出了PCI-PCI Bridge規范、Computer Telephony TDM規范和User-defined I/O pin assignment規范。
標簽： cpci
上傳時間： 2022-05-20
上傳用戶：
This manual documents the Microcontroller profile of version 7 of the ARM? Architecture, the ARMv7-M architecture profile. For short definitions of all the ARMv7 profiles see About the ARMv7 architecture, and architecture profiles on page A1-20.ARMv7 is documented as a set of architecture profiles. The profiles are defined as follows: ARMv7-A The application profile for systems supporting the ARM and Thumb instruction sets, and requiring virtual address support in the memory management model. ARMv7-R The realtime profile for systems supporting the ARM and Thumb instruction sets, and requiring physical address only support in the memory management model ARMv7-M The microcontroller profile for systems supporting only the Thumb instruction set, and where overall size and deterministic operation for an implementation are more important than absolute performance. While profiles were formally introduced with the ARMv7 development, the A-profile and R-profile have implicitly existed in earlier versions, associated with the Virtual Memory System Architecture (VMSA) and Protected Memory System Architecture (PMSA) respectively.
標簽： arm
上傳時間： 2022-06-02
上傳用戶：
ICN6201/02 is a bridge chip which receives MIPI? DSI inputs and sends LVDS outputs. MIPI? DSI supports up to 4 lanes and each lane operates at 1Gbps maximum; the totally maximum input bandwidth is 4Gbps; and the MIPI defined ULPS(ultra-low-power state) is also supported. ICN6201 decodes MIPI? DSI 18bepp RGB666 and 24bpp RGB888 packets.The LVDS output 18 or 24 bits pixel with 25MHz to 154MHz, by VESA or JEIDA format.ICN6201/02 support video resolution up to FHD (1920x1080) and WUXGA (1920x1200).ICN6201 adopts QFN48 package and ICN6202 adopts QFN40 package
標簽： icn6202
上傳時間： 2022-06-10
上傳用戶：kingwide
