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.
標簽： LTE-Advanced Technology Relay
上傳時間： 2020-05-27
上傳用戶：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).
標簽： Communications Multimedia Concepts Mobile
上傳時間： 2020-05-30
上傳用戶：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.
標簽： BroadbanMobile WiMAX Toward Broadband Wirelessd Wireless Mobile Toward WiMAX
上傳時間： 2020-05-30
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
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).
標簽： Communications Networking Wireless
上傳時間： 2020-06-01
上傳用戶：shancjb
74HC595 A4950 MAX3232 ULN2003AD STM32F207VCT6 AD集成封裝庫，原理圖庫器件型號列表：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貼片晶振 A4950 直流電機驅動AO4805CAP CapacitorCAP SMD CapacitorCON2 ConnectorCON2*10 ConnectorCON2*12P ConnectorCON2*7 ConnectorCON2*9 ConnectorCON3 ConnectorCON4 ConnectorCON5 ConnectorCON7 ConnectorCap Pol 極性電解電容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 測量放大器SM712 SN74LV4052AD SP3232ESST25VF016B-50-4I-S2AFI2C Real-Time Clock.STM32F107VTC6 STM32F107VTC6SW DIP-4 編碼開關SW-PB SwitchTPS54302 45UA靜態電流 3ATVS SMBJ30CAULN2003 XC6214XTAL Crystal OscillatorPCB封裝庫列表：Component Count : 40Component Name-----------------------------------------------4g模塊-外置7D181K0603-LED0603C0603R0805C12061210181232255569-2*1P直針5569-2*2P直針AT-26CAP-D8DO-214AANHSOP-8J-SPDT-5JTAGL
上傳時間： 2021-11-15
上傳用戶：ttalli
USR-15X系列產品說明書USR-15X系列體積雖小，功能不少：免插卡上電即聯網，配合外置卡槽，雙卡切換更可靠！藍牙配微信小程序掃一掃，快速配置參數，告別電腦和串口線！靈活裝標準導軌卡扣和隱藏式掛耳，安裝靈活自如！
上傳時間： 2021-12-09
上傳用戶：trh505
QY-nRF51822 是一個功能強大的藍牙開發套件，支持藍牙低功耗（BLE）協議和私有協議。它為廣大的產品開發人員提供了一個平臺，幫助工程師進行產品的開發、評估、測試。nRF51822 屬于挪威NORDIC 公司推出的nRF51 系列2.4g 無線低功耗片上方案解決系統中的一員,已cortex M0內核為基礎，結合BLE4.0 的SoC 。憑借超低的功耗、優越的性能、卓越的設計、nRF51822 得到了越來越廣泛的應用。QY-nRF51822 系列目前出了兩套硬件，后續會有大量新的硬件開發出來。這兩套硬件分別為：nRF51822_EK 主板和USB DONGLE。
標簽： 藍牙
上傳時間： 2021-12-14
上傳用戶：
STM32L475開發板PDF原理圖+AD集成3D封裝庫+主要器件技術手冊，集成封裝庫型號列表如下：Library Component Count : 44Name Description----------------------------------------------------------------------------------------------------ANT-2.4g ANT,2.4g,PCB天線ATK-TEST-1*4-2.54mm 測試點ATK_MODULE 單排母,1*6,2.54mmBEEP 3.3V有源蜂鳴器BUTTON_DIP3 撥動開關SS-12F44C-0402-SMD C-0603-SMD C-CAP-SMD-220uF/10V C-CEP-220uF/16V D-1N4148 Header-1*3-2.54mm 單排針-2.54mmHeader-2*10-2.54mm 雙排針-2.54mmHeader-2*2-2.54mm 雙排針-2.54mmHeader-2*3-2.54mm 雙排針-2.54mmHeader-2*4-2.54mm 雙排座-2.54mmIR-LED 1206紅外發射管（側）IR-LF0038GKLL-1 紅外接收管SMDJ-MICRO-USB-5S Micro USB 5.9有柱腳長1.25加長針L-0420-4.7uH 電感,4.7uH,3ALCD-TFT-H13TS38A LCD,TFT,1.3'240*240,禹龍LED-0603-RED 發光二極管-紅色LED-RGB-1615-0603 RGB,共陽,1615,0603MIC-6022 MICMotor-SMD 電機,SMDPhone-3-M 耳機座,三節R-0402-SMD 貼片電阻R-0805-SMD 貼片電阻RT9193-3.3S-KEY-SMD-324225 KEY,SMD,324225S8050-SMD SD-MICRO-TF SD,MICRO,TFU-AHT10 Sensor,溫濕度傳感器U-AP3216C Sensor.光照/距離U-AP6181 WIFI Module,SDIOU-ES8388 AUDIO,2-ch DAC,2-ch ADCU-ICM-20608 三軸陀螺儀/三軸加速度計,U-L9110S 電機驅動,800mAU-RT9013-3.3 LDO,500mAU-STM32F103C8T6 U-STM32L475VET6 MCU,LQFP100,512K FLASH,128K RAMU-W25Q128 SPI FLASH,16MY-12M-SMD 晶振 - 12M貼片Y-3215-32.768K XTAL,3215,32.768KY-3215-8M XTAL,3215,8MHz
上傳時間： 2021-12-15
上傳用戶：
廣和通是中國首家A股上市的物聯網無線模組企業。致力于將可靠、便捷、安全、智能的無線通信解決方案普及至每一個物聯網應用場景，豐富智慧生活。廣和通提供創新的5G、4g、3G、2G、NB-IoT、LTE-M、智能、車規級無線通信模組及物聯網應用一站式無線通信解決方案 。廣和通擁有全球1000多名員工，產品及服務遍及100多個國家。
標簽： 物聯網
上傳時間： 2021-12-26
上傳用戶：
