LTE-Advanced becomes a truly global standard for 4g cellular communications. Relay, as one of the key technologies of LTE-Advanced, can significantly extend the coverage, and improve the system throughput. LTE-A standards and tech- nologies were described in several recent books where the limited pages for relay feature prevent the detailed explanations of the technology. In this book, we tried to provide an in-depth description of LTE-A relay development. More specifically, significant portions are spent on relay channel modeling and potential technologies during the study item phase of the development, although some of those tech- nologies, such as Type 2 cooperative relay, multi-hop relay, relay with backhaul of carrier aggregation, were not standardized in Release 10 LTE.
标签： LTE-Advanced Technology Relay
上传时间： 2020-05-27
上传用户：shancjb
Mobile multimedia communication is increasingly in demand because of the basic need to communi- cate at any time, anywhere, using any technology. In addition, to voice communication, people have a desire to access a range of other services that comprise multimedia elements—text, image, animation, high fidelity audio and video using mobile communication networks. To meet these demands, mobile communication technologies has evolved from analog to digital, and the networks have passed through a number of generations from first generation (1G) to fourth generation (4g).
标签： Communications Multimedia Concepts Mobile
上传时间： 2020-05-30
上传用户：shancjb
Wireless metropolitan area networks (WirelessMANs) is emerging as a promising broadband wireless access (BWA) technology to provide high-speed, high bandwidth efficiency and high-capacity multimedia services for residential as well as enterprise applications. It is observed that WirelessMAN (e.g., WiMAX) is even regarded as a 4g technology. For the success of the WirelessMANs, international standardization organiza- tions are very actively specifying the standards IEEE 802.16, ETSI HiperMAN and Korea WiBro.
标签： BroadbanMobile WiMAX Toward Broadband Wirelessd Wireless Mobile Toward WiMAX
上传时间： 2020-05-30
上传用户：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.
标签： Cognitive Systems Design Radio RFIC for
上传时间： 2020-06-01
上传用户：shancjb
During the past three decades, the world has seen signifi cant changes in the telecom- munications industry. There has been rapid growth in wireless communications, as seen by large expansion in mobile systems. Wireless communications have moved from fi rst-generation (1G) systems primarily focused on voice communications to third-generation (3G) systems dealing with Internet connectivity and multi-media applications. The fourth-generation (4g) systems will be designed to connect wire- less personal area networks (WPANs), wireless local area networks (WLANs) and wireless wide-area networks (WWANs).
标签： Communications Networking Wireless
上传时间： 2020-06-01
上传用户：shancjb
74HC595 A4950 MAX3232 ULN2003AD STM32F207VCT6 AD集成封装库，原理图库器件型号列表：Library Component Count : 53Name Description----------------------------------------------------------------------------------------------------1N4148 High Conductance Fast Diode1N4448 High Conductance Fast Diode1N914 High Conductance Fast Diode1N914A High Conductance Fast Diode1N914B High Conductance Fast Diode1N916 High Conductance Fast Diode1N916A High Conductance Fast Diode1N916B High Conductance Fast Diode2N3904 NPN General Purpose Amplifier74ALS86 74HC595 8M贴片晶振 A4950 直流电机驱动AO4805CAP CapacitorCAP SMD CapacitorCON2 ConnectorCON2*10 ConnectorCON2*12P ConnectorCON2*7 ConnectorCON2*9 ConnectorCON3 ConnectorCON4 ConnectorCON5 ConnectorCON7 ConnectorCap Pol 极性电解电容DIODE DiodeFUSE1 FuseFUSE2 FuseINDUCTOR2 IRF7351PbF N-MOSJS1-12V-FLED MAX487 MAX809RD R0.125 Less than 1/4 Watt Power Resistor.RES2 RGRPI*4 Res1 ResistorSGM8955XN5G/TR 测量放大器SM712 SN74LV4052AD SP3232ESST25VF016B-50-4I-S2AFI2C Real-Time Clock.STM32F107VTC6 STM32F107VTC6SW DIP-4 编码开关SW-PB SwitchTPS54302 45UA静态电流 3ATVS SMBJ30CAULN2003 XC6214XTAL Crystal OscillatorPCB封装库列表：Component Count : 40Component Name-----------------------------------------------4g模块-外置7D181K0603-LED0603C0603R0805C12061210181232255569-2*1P直针5569-2*2P直针AT-26CAP-D8DO-214AANHSOP-8J-SPDT-5JTAGL
上传时间： 2021-11-15
上传用户：ttalli
USR-15X系列产品说明书USR-15X系列体积虽小，功能不少：免插卡上电即联网，配合外置卡槽，双卡切换更可靠！蓝牙配微信小程序扫一扫，快速配置参数，告别电脑和串口线！灵活装标准导轨卡扣和隐藏式挂耳，安装灵活自如！
上传时间： 2021-12-09
上传用户：trh505
QY-nRF51822 是一个功能强大的蓝牙开发套件，支持蓝牙低功耗（BLE）协议和私有协议。它为广大的产品开发人员提供了一个平台，帮助工程师进行产品的开发、评估、测试。nRF51822 属于挪威NORDIC 公司推出的nRF51 系列2.4g 无线低功耗片上方案解决系统中的一员,已cortex M0内核为基础，结合BLE4.0 的SoC 。凭借超低的功耗、优越的性能、卓越的设计、nRF51822 得到了越来越广泛的应用。QY-nRF51822 系列目前出了两套硬件，后续会有大量新的硬件开发出来。这两套硬件分别为：nRF51822_EK 主板和USB DONGLE。
标签： 蓝牙
上传时间： 2021-12-14
上传用户：
STM32L475开发板PDF原理图+AD集成3D封装库+主要器件技术手册，集成封装库型号列表如下：Library Component Count : 44Name Description----------------------------------------------------------------------------------------------------ANT-2.4g ANT,2.4g,PCB天线ATK-TEST-1*4-2.54mm 测试点ATK_MODULE 单排母,1*6,2.54mmBEEP 3.3V有源蜂鸣器BUTTON_DIP3 拨动开关SS-12F44C-0402-SMD C-0603-SMD C-CAP-SMD-220uF/10V C-CEP-220uF/16V D-1N4148 Header-1*3-2.54mm 单排针-2.54mmHeader-2*10-2.54mm 双排针-2.54mmHeader-2*2-2.54mm 双排针-2.54mmHeader-2*3-2.54mm 双排针-2.54mmHeader-2*4-2.54mm 双排座-2.54mmIR-LED 1206红外发射管（侧）IR-LF0038GKLL-1 红外接收管SMDJ-MICRO-USB-5S Micro USB 5.9有柱脚长1.25加长针L-0420-4.7uH 电感,4.7uH,3ALCD-TFT-H13TS38A LCD,TFT,1.3'240*240,禹龙LED-0603-RED 发光二极管-红色LED-RGB-1615-0603 RGB,共阳,1615,0603MIC-6022 MICMotor-SMD 电机,SMDPhone-3-M 耳机座,三节R-0402-SMD 贴片电阻R-0805-SMD 贴片电阻RT9193-3.3S-KEY-SMD-324225 KEY,SMD,324225S8050-SMD SD-MICRO-TF SD,MICRO,TFU-AHT10 Sensor,温湿度传感器U-AP3216C Sensor.光照/距离U-AP6181 WIFI Module,SDIOU-ES8388 AUDIO,2-ch DAC,2-ch ADCU-ICM-20608 三轴陀螺仪/三轴加速度计,U-L9110S 电机驱动,800mAU-RT9013-3.3 LDO,500mAU-STM32F103C8T6 U-STM32L475VET6 MCU,LQFP100,512K FLASH,128K RAMU-W25Q128 SPI FLASH,16MY-12M-SMD 晶振 - 12M贴片Y-3215-32.768K XTAL,3215,32.768KY-3215-8M XTAL,3215,8MHz
上传时间： 2021-12-15
上传用户：
广和通是中国首家A股上市的物联网无线模组企业。致力于将可靠、便捷、安全、智能的无线通信解决方案普及至每一个物联网应用场景，丰富智慧生活。广和通提供创新的5G、4g、3G、2G、NB-IoT、LTE-M、智能、车规级无线通信模组及物联网应用一站式无线通信解决方案 。广和通拥有全球1000多名员工，产品及服务遍及100多个国家。
标签： 物联网
上传时间： 2021-12-26
上传用户：
