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Rake-receiver

  • 解讀5G八大關(guān)鍵技術(shù)

    解讀 5G 八大關(guān)鍵技術(shù) 【摘要】5G 不是一次革命,5G 是 4G 的延續(xù),我相信 5G 在核心網(wǎng)部分不會(huì)有太 大的變動(dòng),5G 的關(guān)鍵技術(shù)集中在無線部分。 在進(jìn)入主題之前,我覺得首先應(yīng)該弄清楚一個(gè)問題:為什么需要 5G?不是因 為通信工程師們突然想改變世界,而炮制了一個(gè) 5G。是因?yàn)橄扔辛诵枨螅庞辛?5G。什么需求? 未來的網(wǎng)絡(luò)將會(huì)面對(duì):1000 倍的數(shù)據(jù)容量增長(zhǎng),10 到 100 倍的無線設(shè)備連接, 10 到 100 倍的用戶速率需求,10 倍長(zhǎng)的電池續(xù)航時(shí)間需求等等。坦白的講,4G 網(wǎng)絡(luò)無法滿足這些需求,所以 5G 就必須登場(chǎng)。 但是,5G 不是一次革命。5G 是 4G 的延續(xù),我相信 5G 在核心網(wǎng)部分不會(huì)有 太大的變動(dòng),5G 的關(guān)鍵技術(shù)集中在無線部分。雖然 5G 最終將采用何種技術(shù),目前 還沒有定論。不過,綜合各大高端論壇討論的焦點(diǎn),我今天收集了 8 大關(guān)鍵技術(shù)。 當(dāng)然,應(yīng)該遠(yuǎn)不止這些。 1.非正交多址接入技術(shù) (Non-Orthogonal Multiple Access,NOMA) 我們知道 3G 采用直接序列碼分多址(Direct Sequence CDMA ,DS-CDMA) 技術(shù),手機(jī)接收端使用 Rake 接收器,由于其非正交特性,就得使用快速功率控制 (Fast transmission power control ,TPC)來解決手機(jī)和小區(qū)之間的遠(yuǎn)-近問題。 而 4G 網(wǎng)絡(luò)則采用正交頻分多址(

    標(biāo)簽: 5G

    上傳時(shí)間: 2022-02-25

    上傳用戶:20125101110

  • ADC模數(shù)轉(zhuǎn)換器件Altium Designer AD原理圖庫元件庫

    ADC模數(shù)轉(zhuǎn)換器件Altium Designer AD原理圖庫元件庫SV text has been written to file : 4.4 - ADC模數(shù)轉(zhuǎn)換器件.csvLibrary Component Count : 29Name                Description----------------------------------------------------------------------------------------------------ADC0800             National 8-Bit Analog to Digital ConverterADC0809             ADC0831             ADCADC0832             ADC8                Generic 8-Bit A/D ConverterCLC532              High-Speed 2:1 Analog MultiplexerCS5511              National 16-Bit Analog to Digital ConverterDAC8                Generic 8-Bit D/A ConverterEL1501              Differential line Driver/ReceiverEL2082              Current-Mode MultiplierEL4083              Current Mode Four Quadrant MultiplierEL4089              DC Restored Video AmplifierEL4094              Video Gain Control/FaderEL4095              Video Gain Contol/Fader/MultiplexerICL7106             LMC6953_NSC         PCI Local Bus Power SupervisorMAX4147             300MHz, Low-Power, High-Output-Current, Differential Line DriverMAX4158             350MHz 2-Channel Video Multiplexer-AmplifierMAX4159             350MHz 2-Channel Video Multiplexer-AmplifierMAX4258             250MHz, 2-Channel Video Multiplexer-AmplifierMAX4259             250MHz 2-Channel Video Multiplexer-AmplifierMAX951              Ultra-Low-Power, Single-Supply Op Amp + Comparator + ReferenceMAX952              Ultra-Low-Power, Single-Supply Op Amp + Comparator + ReferenceMC1496              Balanced Modulator/DemodulatorPLL100k             Generic Phase Locked LoopPLL10k              Generic Phase Locked LoopPLL5k               Generic Phase Locked LoopPLLx                Generic Phase Locked Loop水位計(jì)              

    標(biāo)簽: adc 模數(shù)轉(zhuǎn)換 altium designer

    上傳時(shí)間: 2022-03-13

    上傳用戶:

  • Qi無線充電原理

    近距電能傳輸——高效安全近距電能傳輸一般基于電磁感應(yīng)原理進(jìn)行。在此技術(shù)基礎(chǔ)上,當(dāng)接收器鄰近發(fā)射器時(shí)才會(huì)進(jìn)行電能傳輸。電磁感應(yīng)技術(shù)的歷史長(zhǎng)達(dá)百年,多年米一直應(yīng)用于各類電子產(chǎn)品中—如此普及全因其簡(jiǎn)單、高效以及安全技術(shù)概覽以下將為你簡(jiǎn)要介紹無線電能傳輸技術(shù)。System Overview(Communication)Receiver sends messagesTo provide control information to the transmitterBy load modulation on the power signaTransmitter receives messagesTo receive control information frorn the recelverBy de-modulation of the reflected loadPower Pick Up( Receiver)Secondary coil (L Serial resonance capacitor (C) for efficient power transfer Parallel resonance capacitor(C, )for detection purposes Rectifier: full bridge(diode, or switched)+ capacitor Output switch for(dis)connecting the loadReceiver modulates load by Switching modulation resistor(R,n),or Switching modulation capacitor(Ca)Transmitter de-modulates reflected load by Sensing pnmary coil curent (p)and/o Sensing primary coil voltage (V,

    標(biāo)簽: qi 無線充電

    上傳時(shí)間: 2022-03-31

    上傳用戶:

  • 基于TMS320F28335的超聲波流量計(jì)硬件原理圖+軟件源碼

    基于TMS320F28335的超聲波流量計(jì)硬件原理圖+軟件源碼本文以TMS320F28335 處理器為核心,設(shè)計(jì)一種用于管道流量測(cè)量的超聲波流量計(jì)。系統(tǒng)硬件由核心板,超聲波發(fā)射和接收電路,切換電路,超聲換能器,基于ADS805 的高速信號(hào)采集電路,人機(jī)交互以及電源等模塊構(gòu)成。采用時(shí)差法進(jìn)行管道流量測(cè)量,時(shí)差測(cè)量采用SCOT 加權(quán)的廣義互相關(guān)時(shí)延估計(jì)算法。本論文設(shè)計(jì)的超聲波流量計(jì)具有測(cè)量速度快、準(zhǔn)確性好、成本低等優(yōu)點(diǎn)。關(guān)鍵字:C2000,超聲波,流量,廣義互相關(guān)算法AbstractA kind of ultrasonic flowmeter using for the pipe flow measurement is designed based onTMS320F28335 in this paper. The system hardware consists of the following parts: the core board,ultrasonic signal transmitter and receiver circuits, switch circuit, ultrasonic transducer, signalacquisition circuit based on ADS805, human-computer interaction module and power supplymodule, etc. The system use the method of time difference for pipeline flow measurement and thetime difference is calculated by the time-delay algorithm of SCOT weighted generalizedcross-correlation. The ultrasonic flowmeter has the features of high testing speed, high precisionand low cost, etc.Keywords: C2000,Ultrasonic, Flow, Generalized Cross-Correlation Algorithm

    標(biāo)簽: tms320f28335 超聲波流量計(jì)

    上傳時(shí)間: 2022-05-06

    上傳用戶:

  • DP轉(zhuǎn)HDMI轉(zhuǎn)換原理圖

    CH7525 is a low-cost, low-power semiconductor device that translates the DisplayPort signal to HDMI/DVI. This innovative DisplayPort receiver with an integrated HDMI Transmitter is specially designed to target the notebook/ultrabook, tablet device and PC market segments. Through the CH7525’s advanced decoding / encoding algorithm, the input DisplayPort high-speed serialized multimedia data can be seamlessly converted to HDMI/DVI output.

    標(biāo)簽: dp hdmi

    上傳時(shí)間: 2022-06-02

    上傳用戶:

  • 基于炬芯(Actions) ATS2819的TWS藍(lán)牙音箱方案

    ATS2819/ATS2819P標(biāo)準(zhǔn)應(yīng)用方案主要分為以下功能模塊:Power Supply,BlueTooth,Audio Input/Output(包括codec、I2C、SPDIF),F(xiàn)M Receiver,disaplay(LED&LCD),USB,SPI NOR Flash Memory,SD/MMC/MS Card等。1.2原理圖設(shè)計(jì)總體原則1原理圖設(shè)計(jì)需要按照方案規(guī)格的要求實(shí)現(xiàn)各項(xiàng)硬件功能,盡量避免功能模塊相互間的資源沖突。如果存在I/O復(fù)用,接收復(fù)用等情況,除了需注意檢查I/O上電狀態(tài),接口時(shí)序等,還需要注意復(fù)用的SIO工作頻率與工作電壓域是否符合要求(如WIO),確保功能設(shè)計(jì)正確實(shí)現(xiàn)。2原理圖設(shè)計(jì)要求性能達(dá)到要求。如穩(wěn)定性,啟動(dòng)電壓,功耗,ESD,EMI等。要注意檢查模塊電源開關(guān)狀態(tài),選擇的原件標(biāo)稱及精度、材質(zhì),接口保護(hù)元件和EMI濾波器等。3系統(tǒng)時(shí)鐘26MHZ,要求CL為7~9PF,精度為+-10PPM。這樣才能保證系統(tǒng)能正常工作。4當(dāng)設(shè)計(jì)PCB受限于模具大小時(shí),各個(gè)模塊無法保證均能得到最優(yōu)的布局布線(如濾波電容要求靠近IC、走線上要求盡量少的過孔與盡可能短的走線)。因?yàn)樵诖私o出一個(gè)模塊優(yōu)先級(jí)以供設(shè)計(jì)人員參考,從而提高方案設(shè)計(jì)的效率,增加一版work的可行性。將優(yōu)先級(jí)以阿拉伯?dāng)?shù)據(jù)排列

    標(biāo)簽: ats2819 tws 藍(lán)牙音箱

    上傳時(shí)間: 2022-06-07

    上傳用戶:

  • SiI9135芯片手冊(cè)

    Introduction The Sil9135/Sil9135A HDMI Receiver with Enhanced Audio and Deep Color Outputs is a second-generation dual-input High Definition Multimedia Interface(HDMI)receiver. It is software-compatible with the Sil9133receiver, but adds audio support for DTS-HD and Dolby TrueHD. Digital televisions that can display 10-or 12-bit color depth can now provide the highest quality protected digital audio and video over a single cable. The Sil9135and Sil9135A devices, which are functionally identical, can receive Deep Color video up to 12-bit,1080p @60Hz. Backward compatibility with the DVI 1.0specification allows HDMI systems to connect to existing DVI 1.0 hosts, such as HD set-top boxes and PCs. Silicon Image HDMI receivers use the latest generation Transition Minimized Differential Signaling(TMDS) core technology that runs at 25-225 MHz.The chip comes pre-programmed with High-bandwidth?

    標(biāo)簽: sii9135 芯片

    上傳時(shí)間: 2022-06-25

    上傳用戶:

  • VIP專區(qū)-單片機(jī)源代碼精選合集系列(68)

    eeworm.com VIP專區(qū) 單片機(jī)源碼系列 67資源包含以下內(nèi)容:1. P89LPC912單片機(jī)數(shù)據(jù)手冊(cè).pdf2. P89LPC932 Flash單片機(jī)使用指南.pdf3. PC MCU串行通信的應(yīng)用設(shè)計(jì)方法.pdf4. RSA加解密系統(tǒng)及其單芯片實(shí)現(xiàn).pdf5. PCF8563實(shí)時(shí)時(shí)鐘高精度調(diào)整方法.pdf6. PAM2862 1A LED Driver with Int.pdf7. AN070219 PCF8563中斷輸出功能.pdf8. SJA1000 Stand-alone CAN contro.pdf9. PCA82C250 PCA82C251 CAN Transc.pdf10. SJA1000獨(dú)立的CAN控制器應(yīng)用指南.pdf11. PCA82C250 CAN收發(fā)器應(yīng)用指南.pdf12. SCN2681 SCN68681和SCC2691數(shù)據(jù)通信.pdf13. Philips單片機(jī)P89V51RD2簡(jiǎn)介.pdf14. 飛利浦SC16C器件和飛利浦低功耗SC16CxxxB器件之間.pdf15. P89V51RD2單片機(jī)看門狗的使用方法.pdf16. SC16C554 SC16C654 SC16C554B SC.pdf17. P89V51RD2的加密操作.pdf18. SC16C550應(yīng)用實(shí)例.pdf19. 如何在C語言中調(diào)用P89V51RD2的IAP功能.pdf20. P89LPC901實(shí)現(xiàn)ADC DAC及UART通信.pdf21. P89LPC900在高精度模數(shù)轉(zhuǎn)換場(chǎng)合的應(yīng)用.pdf22. P89C51Rx2xx硬件進(jìn)入ISP的方法.pdf23. Study-3 51單片機(jī)開發(fā)板原理圖.pdf24. 基于P87LPC760的DALI從機(jī).pdf25. PCA9515D PCA9515DP I2C中繼器.pdf26. PCA9534 8bit I2C bus and SMBus low power IO port with interru.pdf27. LPC900 Flash單片機(jī)鍵盤中斷.pdf28. PCA9516 5channel I2C hub.pdf29. PCA9535 PCA9535C 16bit I2C bus.pdf30. LPC700系列單片機(jī)看門狗復(fù)位應(yīng)注意的問題.pdf31. PCA9516 I2C中繼器.pdf32. PCA9536 4bit I2C bus and SMBus.pdf33. 內(nèi)置Reset WDT電路的串行E2PROM原理及應(yīng)用設(shè)計(jì).pdf34. PCA9517 Level translating I2C-.pdf35. PCA9537 4bit I2C bus and SMBus.pdf36. X-tal oscillators on 8-bit mic.pdf37. PCA9517低電壓I2C總線中繼器.pdf38. PCA9538 8bit I2C bus and SMBus.pdf39. 8051系列單片機(jī)應(yīng)用系統(tǒng)的PROTEUS仿真設(shè)計(jì).doc40. PCA9518 Expandable 5channel I2.pdf41. PCA9539 PCA9539R 16-bit I2C-bu.pdf42. 基于單總線技術(shù)蓄電池監(jiān)控系統(tǒng)設(shè)計(jì).pdf43. PCA9518A I2C 中繼器集線器與擴(kuò)展器.pdf44. PCA9540B 2channel I2C bus mult.pdf45. 基于AT89C51應(yīng)用系統(tǒng)的串行通信設(shè)計(jì).pdf46. PCA9519 4channel level transla.pdf47. PCA9541 2 to 1 I2C-bus master.pdf48. PCA9519 4通道I2C-bus SMBus 中繼器.pdf49. PCA9544A 4channel I2C multiple.pdf50. PCA9542A 2channel I2C bus mult.pdf51. PCA9544A I2C多路復(fù)用器.pdf52. PCA9544中文資料.pdf53. PCA9549 Octal bus switch with.pdf54. PCA9545A/PCA9545B/PCA9545C I2C.pdf55. PCA9549D/PCA9549PW/PCA9549B I2.pdf56. PCA9546A 4 channel I2C bus swi.pdf57. PCA9555 16bit I2C-bus and SMBu.pdf58. PCA9546A I2C多路復(fù)用器和開關(guān).pdf59. PCA9670 Remote 8-bit IO expand.pdf60. PCA9547 8 channel I2C bus mult.pdf61. PCA9671 Remote 16-bit IO expan.pdf62. PCA9547D/PW/BS I2C多路復(fù)用器和開關(guān).pdf63. PCA9672 Remote 8-bit IO expand.pdf64. PCA9548中文資料.pdf65. PCA9673 Remote 16-bit IO expan.pdf66. PCA9548A 8 channel I2C bus swi.pdf67. PCA9674 PCA9674A Remote 8-bit.pdf68. PCA9548AB I2C多路復(fù)用器和開關(guān).pdf69. 8-bit I2C-bus and SMBus IO port with reset.pdf70. PCA9698芯片的應(yīng)用.pdf71. PCA9698 I2C擴(kuò)展芯片.pdf72. PCF2123的中斷輸出功能.pdf73. TI新推29款Cortex-M3內(nèi)核Stelleris AR.pdf74. 端口RS-232工業(yè)PC104多串口卡.pdf75. TIPC1000帶視頻輸入接口的嵌入式觸摸平板電腦.pdf76. 串口調(diào)試助手用戶手冊(cè).pdf77. PCM8416AS自動(dòng)校準(zhǔn)功能智能型PC104高分辨率多功能.pdf78. TJA1042高速CAN 收發(fā)器.pdf79. COS-II調(diào)試插件.pdf80. PROFIBUS技術(shù)和應(yīng)用.pdf81. TJA1042 High-speed CAN transce.pdf82. TKStudio IDE集成開發(fā)環(huán)境升級(jí)記錄.pdf83. Replacement of NXP PCA9518 wit.pdf84. TJA1051高速CAN 收發(fā)器.pdf85. 1A SIMPLE STEP-DOWN SWITCHING.pdf86. RSM232隔離RS-232收發(fā)器.pdf87. TJA1051 High-speed CAN transce.pdf88. DUAL RS-232 DRIVER RECEIVER WI.pdf89. RSM-4055 8通道隔離數(shù)字量輸入輸出模塊.pdf90. 外部工具用戶手冊(cè).pdf91. XGate COP10 CANopen 嵌入式通信模塊.pdf92. RSM-6505 5通道熱電偶測(cè)量模塊.pdf93. 十六進(jìn)制編輯器.pdf94. ZigBee模塊ZICM2410應(yīng)用開發(fā)指南.pdf95. RSM-65055通道熱電偶測(cè)溫模塊.pdf96. 圖片字模助手.pdf97. ZY00xxGD-10W交直流兩用全電壓輸入AC-DC電源模.pdf98. TKStudio下SDCC_8051用戶使用手冊(cè).pdf99. 定壓輸出隔離穩(wěn)壓?jiǎn)屋敵鱿盗?pdf100. ZY00xxGD-15W交直流兩用全電壓輸入AC-DC電源模.pdf

    標(biāo)簽: 電子技術(shù)基礎(chǔ) 模擬電子技術(shù) 電子教案

    上傳時(shí)間: 2013-04-15

    上傳用戶:eeworm

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