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(biāo)簽： Communications Networking Wireless
上傳時(shí)間： 2020-06-01
上傳用戶(hù)：shancjb
The use of optical free-space emissions to provide indoor wireless commu- nications has been studied extensively since the pioneering work of Gfeller and Bapst in 1979 [1]. These studies have been invariably interdisciplinary in- volving such far flung areas such as optics design? indoor propagation studies? electronics design? communications systems design among others. The focus of this text is on the design of communications systems for indoor wireless optical channels. Signalling techniques developed for wired fibre optic net- works are seldom efficient since they do not consider the bandwidth restricted nature of the wireless optical channel.
標(biāo)簽： Communication Wireless Optical Systems
上傳時(shí)間： 2020-06-01
上傳用戶(hù)：shancjb
This book is concerned with integrated circuits and systems for wireless and mobile communications. Circuit techniques and implementation of reconfigurable low-voltage and low-power single-chip CMOS transceivers for multiband and multi- mode universal wireless communications are the focus of the book. Applications encompass both long-range mobile cellular communications (GSM and UMTS) and short-range wireless LANs (IEEE802.11 and Bluetooth). Recent advances in research into transceiver architecture, RF frontend, analogue baseband, RF CAD and automatic testing are reported.
標(biāo)簽： Communication Wireless Circuits Systems and
上傳時(shí)間： 2020-06-01
上傳用戶(hù)：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(shí)間： 2020-06-01
上傳用戶(hù)：shancjb
The planarization technology of Chemical-Mechanical-Polishing (CMP), used for the manufacturing of multi- level metal interconnects for high-density Integrated Circuits (IC), is also readily adaptable as an enabling technology in MicroElectroMechanical Systems (MEMS) fabrication, particularly polysilicon surface micromachining. CMP not only eases the design and manufacturability of MEMS devices by eliminating several photolithographic and film issues generated by severe topography, but also enables far greater flexibility with process complexity and associated designs. T
標(biāo)簽： mechanical polishing Chemical
上傳時(shí)間： 2020-06-06
上傳用戶(hù)：shancjb
adio Frequency Identification (RFID) is a rapidly developing automatic wireless data-collection technology with a long history.The first multi-bit functional passive RFID systems,with a range of several meters, appeared in the early 1970s, and continued to evolve through the 1980s. Recently, RFID has experienced a tremendous growth,due to developments in integrated circuits and radios, and due to increased interest from the retail industrial and government.
標(biāo)簽： RFID-Enabled Sensors RFID and
上傳時(shí)間： 2020-06-08
上傳用戶(hù)：shancjb
Radio frequency identification (RFID) and Wireless sensor networks (WSN) are the two key wireless technologies that have diversified applications in the present and the upcoming systems in this area. RFID is a wireless automated recognition technology which is primarily used to recognize objects or to follow their posi- tion without providing any sign about the physical form of the substance. On the other hand, WSN not only offers information about the state of the substance and environment but also enables multi-hop wireless communications.
標(biāo)簽： Architecture Integrated RFID-WSN
上傳時(shí)間： 2020-06-08
上傳用戶(hù)：shancjb
AC220V轉(zhuǎn)DC(12V15W )電源板AD設(shè)計(jì)硬件原理圖+PCB文件，2層板設(shè)計(jì)，大小為100*55mm, ALTIUM設(shè)計(jì)的原理圖+PCB文件，可以做為你的學(xué)習(xí)設(shè)計(jì)參考。主要器件型號(hào)如下：Library Component Count : 24Name Description----------------------------------------------------------------------------------------------------2N3904 NPN General Purpose Amplifier2N3906 PNP General Purpose AmplifierBRIDGE1 Diode BridgeCON2 ConnectorCap CapacitorCap Pol1 Polarized Capacitor (Radial)D Zener Zener DiodeDIODE Diode 1N914 High Conductance Fast DiodeECELECTRO2 Electrolytic CapacitorFP103 FUSE-HHeader 2 Header, 2-PinINDUCTOR2 NMOS-2 N-Channel Power MOSFETPC837 OptoisolatorRES2-B Res Varistor Varistor (Voltage-Sensitive Resistor)T TR-2B TRANS1UCC28051 Volt Reg Voltage Regulator
上傳時(shí)間： 2021-11-21
上傳用戶(hù)：kent
Texas instruments MIPI DSI to eDP converter. Input supports 2 channel, 4 lanes each, up to 1.5GBit/s. Total input bandwidth is 12Gbit/s. Output eDP 1.4 1,2 or 4 lanes up to 5.4Gbit/s. output up to 4096x2304 60fps.
上傳時(shí)間： 2021-12-22
上傳用戶(hù)：
MICRO HDMI TF卡 USBTYPE-C USB-側(cè)立式 攝像頭FPC-24P OLED屏模塊AD集成庫(kù)（原理圖庫(kù)+3D封裝庫(kù)），）.IntLib后綴文件，拆分后文件為PcbLib+SchLib格式，Altium Designer原理圖庫(kù)+PCB封裝庫(kù)，已驗(yàn)證使用，可以直接應(yīng)用到你的項(xiàng)目開(kāi)發(fā)。器件列表：ANT-Rainsun-AP5120AZ1045-04F BSN20BKR N-Channel 60 V 2.8 Ohm 310 mW 0.49 nC Surface Mount Trench MosFet - SOT-23ButtonTACT_3x4x2_180ButtonCP2102 USB轉(zhuǎn)TTLESD-0402 ESDHDR2x4_2.54 HeaderLED_0402 LEDLM4871LP2992 LDOMIC Micro-HDMI Conn Micro HDMI RCP 19 POS 0.4mm Solder RA SMD 19 Terminal 1 Port Micro HDMI Embossed T/RNL27WZU04DF OLED-6432 顯示屏OV2640 Header, 24-PinQuantum-Quark-Core RJ45座 RJ45座RT9011 TF卡座 8腳自彈USB-Type-C-TOP USB-WiFi-ANTUSB-側(cè)立式 USB A Skt, Upright/Flag, R/A GF, W/kinked shell stake, tray電容-0402 Capacitor電容-0603 Capacitor電阻-0402 Resistor二極管-5B5817WS 40V晶振-4Pin-無(wú)源 2520無(wú)源選擇跳線(xiàn) Resistor
上傳時(shí)間： 2022-01-09
上傳用戶(hù)：
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