At recent major international conferences on wireless communications, there have been several sessions on beyond third generation (3G) or fourth generation(4G)mobilecommunicationssystems,wheremodulation/demod- ulation and multiplexing/multiple access schemes related to multicarrier techniques have drawn a lot of attention. We often met at the conference venuesandrealizedthatnobookcoveredthebasicsofmulticarriertechniques to recent applications aiming at the 4G systems. Therefore, we decided to write a book on multicarrier techniques for 4G mobile communications systems.
标签： Communications Multicarrier Techniques Mobile for 4G
上传时间： 2020-05-31
上传用户：shancjb
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.
标签： Communication Multi-point Cooperative Systems
上传时间： 2020-05-31
上传用户：shancjb
The continuing vitality of spread-spectrum communication systems and the devel- opment of new mathematical methods for their analysis provided the motivation to undertake this new edition of the book. This edition is intended to enable readers to understand the current state-of-the-art in this field. Almost twenty percent of the materialinthiseditionisnew, includingseveralnewsections, anewchapteronadap- tive arrays and filters, and a new chapter on code-division multiple-access networks.
标签： Spread-Spectrum Communication Principles of
上传时间： 2020-05-31
上传用户：shancjb
The single-carrier frequency division multiple access (SC-FDMA) system is a well-known system that has recently become a preferred choice for mobile uplink channels. This is attributed to its advantages such as the low peak-to-average power ratio (PAPR) and the use of frequency domain equalizers. Low PAPR allows the system to relax the specifications of linearity in the power amplifier of the mobile terminal, which reduces cost and power consumption.
标签： Communications SC-FDMA Mobile for
上传时间： 2020-06-01
上传用户：shancjb
The continuing vitality of spread-spectrum communication systems and the devel- opment of new mathematical methods for their analysis provided the motivation to undertake this new edition of the book. This edition is intended to enable readers to understand the current state-of-the-art in this field. Almost twenty percent of the materialinthiseditionisnew, includingseveralnewsections, anewchapteronadap- tive arrays and filters, and a new chapter on code-division multiple-access networks. The remainder of the material has been thoroughly revised, and I have removed a considerable amount of material that has been superseded by more definitive results.
标签： Spread-Spectrum Communication Systems 3rd
上传时间： 2020-06-01
上传用户：shancjb
A mobile ad-hoc network (MANET) is formed by multiple moving nodes equipped with wireless transceivers. The mobile nodes communicate with each other through multi-hop wireless links, where every node can transmit and receive information. Mobile ad-hoc networks have become increasingly important in areas where deployment of communications infrastructure is difficult.
标签： Telecommunications Modeling
上传时间： 2020-06-01
上传用户：shancjb
An acronym for Multiple-In, Multiple-Out, MIMO communication sends the same data as several signals simultaneously through multiple antennas, while still utilizing a single radio channel. This is a form of antenna diversity, which uses multiple antennas to improve signal quality and strength of an RF link. The data is split into multiple data streams at the transmission point and recombined on the receive side by another MIMO radio configured with the same number of antennas. The receiver is designed to take into account the slight time difference between receptions of each signal, any additional noise or interference, and even lost signals.
标签： Understanding_the_Basics_of_MIMO
上传时间： 2020-06-01
上传用户：shancjb
Once upon a time, cellular wireless networks provided two basic services: voice telephony and low-rate text messaging. Users in the network were separated by orthogonal multiple access schemes, and cells by generous frequency reuse patterns [1]. Since then, the proliferation of wireless services, fierce competition, andthe emergenceof new service classes such as wireless data and multimediahave resulted in an ever increasing pressure on network operators to use resources in a moreefficient manner.In the contextof wireless networks,two of the most common resources are power and spectrum—and, due to regulations, these resources are typically scarce. Hence, in contrast to wired networks, overprovisioning is not feasible in wireless networks.
标签： Maximization Nonconvex Wireless Utility Systems in
上传时间： 2020-06-01
上传用户：shancjb
The advent of modern wireless devices, such as smart phones and MID 1 terminals, has revolutionized the way people think of personal connectivity. Such devices encompass multiple applications ranging from voice and video to high-speed data transfer via wireless networks. The voracious appetite of twenty-first century users for supporting more wireless applications on a single device is ever increasing. These devices employ multiple radios and modems that cover multiple frequency bands and multiple standards with a manifold of wireless applications often running simultaneously.
标签： Architectures Wireless Receiver Design and
上传时间： 2020-06-01
上传用户：shancjb
产品型号：VK1650 产品品牌： VINTEK/元泰 封装形式：SOP16 产品年份：新年份 联 系 人：许先生 Q Q：191 888 5898 联系手机：188 9858 2398（信） 台湾通泰一级代理，原装现货更有优势！工程服务，技术支持，让您的生产高枕无忧！ 概述 VK1650 是一种带键盘扫描电路接口的 LED 驱动控制专用电路。内部集成有 MCU 输入输出控制数字 接口、数据锁存器、LED 驱动、键盘扫描、辉度调节等电路。本芯片性能稳定、质量可靠、抗干扰能力 强，可适应于 24 小时长期连续工作的应用场合。 功能特点 显示模式：8 段×4 位 段驱动电流不小于 25mA，字驱动电流不小于 150mA 提供 8 级亮度控制 键盘扫描：7×4bit 高速两线式串行接口 内置时钟振荡电路 内置上电复位电路 支持 3V－5.5V 电源电压 提供 DIP16（VK1650P）及 SOP16(VK1650M)封装 此资料为产品概述，可能会有错漏。如需完整产品PDF资料可以联系许先生索取！ 产品型号：VK1651 产品品牌： VINTEK/元泰 封装形式：SOP16 产品年份：新年份 联 系 人：许先生 Q Q：191 888 5898 联系手机：188 9858 2398（信） 台湾通泰一级代理，原装现货更有优势！工程服务，技术支持，让您的生产高枕无忧！ 量大价优，保证原装正品。您有量，我有价！ 概述 VK1651 是一种带键盘扫描电路接口的 LED 驱动控制专用电路。内部集成有 MCU 输入输出控制数字 接口、数据锁存器、LED 驱动、键盘扫描、辉度调节等电路。本芯片性能稳定、质量可靠、抗干扰能力 强，可适应于 24 小时长期连续工作的应用场合。 功能特点 显示模式：8 段×4 位 段驱动电流不小于 25mA，字驱动电流不小于 150mA 提供 8 级亮度控制 键盘扫描：7×4bit 高速两线式串行接口 内置时钟振荡电路 内置上电复位电路 支持 3V－5.5V 电源电压 提供 DIP16（VK1650P）及 SOP16(VK1650M)封装 此资料为产品概述，可能会有错漏。如需完整产品PDF资料可以联系许先生索取！ 产品型号：VK1616 产品品牌： VINTEK/元泰 封装形式：SOP16 产品年份：新年份 联 系 人：许先生 Q Q：191 888 5898 联系手机：188 9858 2398（信） 台湾通泰一级代理，原装现货更有优势！工程服务，技术支持，让您的生产高枕无忧！ 量大价优，保证原装正品。您有量，我有价！ 概述 VK1616 是 1/5～1/8 占空比的 LED 显示控制驱动电路。具有 7 根段输出、4 根栅输出，是一个由显示存储器、控制电路组成的高可靠性的 LED 驱动电路。串行数据通过三线串行接口输入到 VK1616，采用SOP16/DIP16 的封装形式。 二、 特性说明 CMOS 工艺 低功耗 显示模式 7 段×4 位 8 个层次的亮度调节电路 三线串行接口 内置 RC 振荡 封装形式为 SOP16(M)/DIP16(P) 永嘉原厂LED/LCD液晶控制器及驱动器系列 芯片简介如下： 内存映射的LED控制器及驱动器 VK1628 --- 通讯接口:STb/CLK/DIO 电源电压:5V(4.5～5.5V) 驱动点阵:70/52 共阴驱动:10段7位/13段4位 共阳驱动:7段10位 按键:10x2 封装SOP28 VK1629 --- 通讯接口:STb/CLK/DIN/DOUT 电源电压:5V(4.5～5.5V) 驱动点阵:128 共阴驱动:16段8位 共阳驱动:8段16位 按键:8x4 封装QFP44 VK1629A --- 通讯接口:STb/CLK/DIO 电源电压:5V(4.5～5.5V) 驱动点阵:128 共阴驱动:16段8位 共阳驱动:8段16位 按键:--- 封装SOP32 VK1629B --- 通讯接口:STb/CLK/DIO 电源电压:5V(4.5～5.5V) 驱动点阵:112 共阴驱动:14段8位 共阳驱动:8段14位 按键:8x2 封装SOP32 VK1629C --- 通讯接口:STb/CLK/DIO 电源电压:5V(4.5～5.5V) 驱动点阵:120 共阴驱动:15段8位 共阳驱动:8段15位 按键:8x1 封装SOP32 VK1629D --- 通讯接口:STb/CLK/DIO 电源电压:5V(4.5～5.5V) 驱动点阵:96 共阴驱动:12段8位 共阳驱动:8段12位 按键:8x4 封装SOP32 VK1640 --- 通讯接口: CLK/DIN 电源电压:5V(4.5～5.5V) 驱动点阵:128 共阴驱动:8段16位 共阳驱动:16段8位 按键:--- 封装SOP28 VK1640A --- 通讯接口: CLK/DIN 电源电压:5V(4.5～5.5V) 驱动点阵:128 共阴驱动:8段16位 共阳驱动:16段8位 按键:--- 封装SSOP28 VK1640B --- 通讯接口: CLK/DIN 电源电压:5V(4.5～5.5V) 驱动点阵:96 共阴驱动:8段12位 共阳驱动:12段8位 按键:--- 封装SSOP24 VK1650 --- 通讯接口: SCL/SDA 电源电压:5V(3.0～5.5V) 共阴驱动:8段4位 共阳驱动:4段8位 按键:7x4 封装SOP16/DIP16 VK1651 --- 通讯接口: SCL/SDA 电源电压:5V(3.0～5.5V) 共阴驱动:7段4位 共阳驱动:4段7位 按键:7x1 封装SOP16/DIP16 VK1616 --- 通讯接口: 三线串行 电源电压:5V(3.0～5.5V) 显示模式：7段4位 按键:7x1 封装SOP16/DIP16 VK1668 ---通讯接口:STb/CLK/DIO 电源电压:5V(4.5～5.5V) 驱动点阵:70/52 共阴驱动:10段7位/13段4位 共阳驱动:7段10位 按键:10x2 封装SOP24 VK6932 --- 通讯接口:STb/CLK/DIN 电源电压:5V(4.5～5.5V) 驱动点阵:128 共阴驱动:8段16位17.5/140mA 共阳驱动:16段8位 按键:--- 封装SOP32 RAM映射LCD控制器和驱动器系列 VK1024b 2.4V～5.2V 6seg*4com 6*3 6*2 偏置电压1/2 1/3 S0P-16 VK1056b 2.4V～5.2V 14seg*4com 14*3 14*2 偏置电压1/2 1/3 SOP-24/SSOP-24 VK1072B 2.4V～5.2V 18seg*4com 18*3 18*2 偏置电压1/2 1/3 SOP-28 VK1072C 2.4V～5.2V 18seg*4com 18*3 18*2 偏置电压1/2 1/3 SOP-28 VK1088b 2.4V～5.2V 22seg*4com 22*3 偏置电压1/2 1/3 QFN-32L（4MM*4MM） VK0192 2.4V～5.2V 24seg*8com 偏置电压1/4 LQFP-44 VK0256 2.4V～5.2V 32seg*8com 偏置电压1/4 QFP-64 VK0256b 2.4V～5.2V 32seg*8com 偏置电压1/4 LQFP-64 VK0256C 2.4V～5.2V 32seg*8com 偏置电压1/4 LQFP-52 VK1621S-1 2.4V～5.2V 32*4 32*3 32*2 偏置电压1/2 1/3 LQFP44/48/SSOP48/SKY28/DICE裸片 VK1622B 2.7V～5.5V 32seg*8com 偏置电压1/4 LQFP-48 VK1622S 2.7V～5.5V 32seg*8com 偏置电压1/4 LQFP44/48/52/64/QFP64/DICE裸片 VK1623S 2.4V～5.2V 48seg*8com 偏置电压1/4 LQFP-100/QFP-100/DICE裸片 VK0384 2.4V～5.2V 48seg*8com 偏置电压1/4 LQFP64(7MM*7MM) VK1625 2.4V～5.2V 64seg*8com 偏置电压1/4 LQFP-100/QFP-100/DICE VK1626 2.4V～5.2V 48seg*16com 偏置电压1/5 LQFP-100/QFP-100/DICE (高品质 高性价比：液晶显示驱动IC 原厂直销 工程技术支持！) 高抗干扰LCD液晶控制器及驱动系列 VK2C21A 2.4～5.5V 20seg*4com 16*8 偏置电压1/3 1/4 I2C通讯接口 SOP-28 VK2C21B 2.4～5.5V 16seg*4com 12*8 偏置电压1/3 1/4 I2C通讯接口 SOP-24 VK2C21C 2.4～5.5V 12seg*4com 8*8 偏置电压1/3 1/4 I2C通讯接口 SOP-20 VK2C21D 2.4～5.5V 8seg*4com 4*8 偏置电压1/3 1/4 I2C通讯接口 NSOP-16 VK2C22A 2.4～5.5V 44seg*4com 偏置电压1/2 1/3 I2C通讯接口 LQFP-52 VK2C22B 2.4～5.5V 40seg*4com 偏置电压1/2 1/3 I2C通讯接口 LQFP-48 VK2C23A 2.4～5.5V 56seg*4com 52*8 偏置电压1/3 1/4 I2C通讯接口 LQFP-64 VK2C23B 2.4～5.5V 36seg*8com 偏置电压1/3 1/4 I2C通讯接口 LQFP-48 VK2C24 2.4～5.5V 72seg*4com 68*8 60*16 偏置电压1/3 1/4 1/5 I2C通讯接口 LQFP-80 超低功耗LCD液晶控制器及驱动系列 VKL060 2.5～5.5V 15seg*4com 偏置电压1/2 1/3 I2C通讯接口 SSOP-24 VKL128 2.5～5.5V 32seg*4com 偏置电压1/2 1/3 I2C通讯接口 LQFP-44 VKL144A 2.5～5.5V 36seg*4com 偏置电压1/2 1/3 I2C通讯接口 TSSOP-48 VKL144B 2.5～5.5V 36seg*4com 偏置电压1/2 1/3 I2C通讯接口 QFN48L (6MM*6MM) 静态显示LCD液晶控制器及驱动系列 VKS118 2.4～5.2V 118seg*2com 偏置电压 -- 4线通讯接口 LQFP-128 VKS232 2.4～5.2V 116seg*2com 偏置电压1/1 1/2 4线通讯接口 LQFP-128 联系人：许先生 联系手机：188 9858 2398 （微信） 联系QQ：191 888 5898 E-mail：zes1688@163.com 以上介绍内容为IC参数简介，难免有错漏，且相关IC型号众多，未能一一收录。欢迎联系索取完整资料及样品！ 请加许先生 QQ：191 888 5898联系！谢谢 生意无论大小，做人首重诚信！本公司全体员工将既往开来，再接再厉。争取为各位带来更专业的技术支持，更优质的销售服务，更高性价比的好产品.竭诚希望能与各位客户朋友深入沟通，携手共进，共同成长，合作共赢！谢谢。
上传时间： 2020-06-02
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