Since the principle of multi-carrier code division multiple access (MC-CDMA) was simultaneously proposed by Khaled Fazel et al. and Nathan Yee et al. at the IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC) in the year 1993, multi-carrier spread spectrum (MC-SS) has rapidly become one of the most wide spread independent research topics on the field of mobile radio communications. Therefore, the International Workshop on Multi-Carrier Spread Spectrum (MC-SS) was initiated in the year 1997. Multi-carrier and spread spectrum systems with their generic air interface and adaptive technologies are considered as potential candidates to fulfill the requirements of next generation mobile communications systems.
標(biāo)簽： Multi-Carrier Spectrum Spread 2007
上傳時(shí)間： 2020-05-31
上傳用戶(hù)：shancjb
Public telephone operators and new independent wireless operators through- out the world are deploying wireless access in an effort to drastically reduce delivery costs in the most expensive part of the network?the local loop. Available radio technology enables both existing and new entrants to access subscribers in a rapid manner and deliver their basic telephony products and broadband-enhanced services.
標(biāo)簽： Transmission Handbooks Systems Design
上傳時(shí)間： 2020-06-01
上傳用戶(hù)：shancjb
Wavelength division multiplexing (WDM) refers to a multiplexing and transmission scheme in optical telecommunications fibers where different wavelengths, typically emitted by several lasers, are modulated independently (i.e., they carry independent information from the transmitters to the receivers). These wavelengths are then multiplexed in the transmitter by means of passive WDM filters, and likewise they are separated or demultiplexed in the receiver by means of the same filters or coherent detection that usually involves a tunable local oscillator (laser).
標(biāo)簽： Multiplexing Wavelength Division
上傳時(shí)間： 2020-06-01
上傳用戶(hù)：shancjb
PW1555 is a programmable current limit switch with input voltage range selection and outputvoltage clamping. Extremely low RDS(ON) of the integrated protection N-channel FET helps toreduce power loss during the normal operation. Programmable soft-start time controls the slew rateof the output voltage during the start-up time. independent enable control allows the complicatedsystem sequencing control. It integrates the over-temperature protection shutdown andautorecovery with hystersis
標(biāo)簽： pw1555
上傳時(shí)間： 2022-02-14
上傳用戶(hù)：
對(duì)某四輪獨(dú)立驅(qū)動(dòng)電動(dòng)汽車(chē)輪轂電機(jī)進(jìn)行研究,設(shè)計(jì)一種永磁無(wú)刷直流電機(jī)控制器.以STM32F103RBT6芯片為基礎(chǔ),對(duì)電機(jī)驅(qū)動(dòng)電路、采樣電路和保護(hù)電路分別進(jìn)行硬件設(shè)計(jì)與分析;同時(shí),采用模塊化軟件設(shè)計(jì)方案,對(duì)該控制器的軟件系統(tǒng)進(jìn)行升級(jí).實(shí)驗(yàn)驗(yàn)證表明:所設(shè)計(jì)的電機(jī)控制器能使電機(jī)響應(yīng)迅速、轉(zhuǎn)速穩(wěn)定、無(wú)超調(diào),且電動(dòng)車(chē)動(dòng)力輸出性能良好.A permanent magnet brushless direct current motor controller was designed by studying the hub motor of a four-wheel independent drive electric vehicle.Based on STM32 F103RBT6 chip,the hardware design and analysis of motor drive circuit,sampling circuit and protection circuit were carried out respectively.At the same time,modular software design scheme was adopted to upgrade the software system of the controller.Experimental results show that the designed motor controller can ensure the motor fast response,stable speed,no overshoot,and good power output performances.
標(biāo)簽： 電動(dòng)汽車(chē) 永磁無(wú)刷直流電機(jī)
上傳時(shí)間： 2022-03-26
上傳用戶(hù)：qingfengchizhu
實(shí)驗(yàn)教學(xué)一直是工科教學(xué)中不可或缺的組成部分,對(duì)培養(yǎng)學(xué)生的動(dòng)手能力,獨(dú)立思考能力,創(chuàng)新思維與發(fā)散思維具有重要的作用。針對(duì)目前電路教學(xué)實(shí)驗(yàn)中電路仿真實(shí)驗(yàn)與實(shí)物電路實(shí)驗(yàn)各自獨(dú)立,無(wú)法統(tǒng)一問(wèn)題,提出將仿真電路實(shí)驗(yàn)與實(shí)物電路實(shí)驗(yàn)有機(jī)的結(jié)合同步操作,并使用Web發(fā)布實(shí)現(xiàn)遠(yuǎn)程實(shí)驗(yàn)操作。采用Multisim作為電路實(shí)驗(yàn)仿真平臺(tái),NI Eiviss II作為實(shí)物電路實(shí)驗(yàn)硬件平臺(tái),運(yùn)用LabVIEW整合Multisim電路仿真實(shí)驗(yàn)與實(shí)物電路實(shí)驗(yàn),實(shí)現(xiàn)仿真與實(shí)物實(shí)驗(yàn)有機(jī)結(jié)合,兩種實(shí)驗(yàn)可同步進(jìn)行。學(xué)生在仿真實(shí)驗(yàn)中先可探索實(shí)驗(yàn),然后做實(shí)物實(shí)驗(yàn)。同時(shí)運(yùn)用LabVIEW開(kāi)發(fā)出實(shí)驗(yàn)過(guò)程人機(jī)交互操作接口界面,使用過(guò)程中效果良好。Experimental teaching has always been an indispensable part of engineering education.And it always plays an important role in cultivating students'practical ability,independent thinking ability,innovative thinking and divergent thinking.But simulation experiment and physical experiment cannot be unified in the circuit teaching experiment at present.In order to solve this problem,this paper proposes to combine organically the simulation circuit experiment with physical circuit experiment,and synchronously operate them.This paper uses the WEB publishing to achieve remote experimental operation.Multisim is used as the circuit simulation platform,and NI Eiviss II is used as the physical circuit hardware platform.Multisim circuit simulation experiment and physical circuit experiment are implemented by LabVIEW to realize the combination of simulation experiment and physical experiment.Students do explore experiments in simulation experiment firstly,and then do physical experiment.And this paper uses LabVIEW to develop the experimental man-machine interface.
上傳時(shí)間： 2022-04-05
上傳用戶(hù)：
VIP專(zhuān)區(qū)-嵌入式/單片機(jī)編程源碼精選合集系列（40）資源包含以下內(nèi)容：1. epson公司的一個(gè)關(guān)于s1d13706的低層驅(qū)動(dòng)程序.2. ads1.2的一個(gè)工程.3. 一些FPGA的擴(kuò)展電路原理圖.4. 一些DSP的c語(yǔ)言源程序.5. 凌陽(yáng)單片機(jī)聲控小車(chē)源碼,對(duì)于想開(kāi)發(fā)聲控小車(chē)的人來(lái)說(shuō),是相當(dāng)有用的.6. ATMEL的下載線(xiàn)制作和下載軟件,有需要的可以來(lái)看.7. 一個(gè)比較老的C語(yǔ)言編譯器,WAVE的老板本仿真器只能用他.8. LM8361、TMS3450、TMS1943數(shù)字鐘電路.9. 該程序代碼實(shí)現(xiàn)對(duì)Flash Rom AM29LV160燒寫(xiě)數(shù)據(jù)的功能.10. 嵌入PIC16F77的激光傳感器程序RS485輸出.11. PIC16F77單片機(jī)I2C讀寫(xiě)程序.12. 這是家用攝像頭的源程序.13. lwIP is a small independent implementation of the TCP/IP protocol suite that has been developed by.14. 詳細(xì)的MiniGUI源代碼.15. 日本的嵌入式實(shí)時(shí)操作系統(tǒng)UITRON3.0 該系統(tǒng)以得到幾十億片的應(yīng)用業(yè)績(jī).16. IEC61131-3標(biāo)準(zhǔn)說(shuō)明.17. 一線(xiàn)通訊協(xié)議的c51例子程序源代碼.18. C字符串底層函數(shù)的實(shí)現(xiàn)。對(duì)一些想了解C的低層函數(shù)的人很有幫助.19. 使用vhdl語(yǔ)言編寫(xiě)的交通燈控制程序.20. 使用C語(yǔ)言編寫(xiě)的單片機(jī)控制LCD顯示程序.21. 此程序是一底層開(kāi)發(fā)驅(qū)動(dòng)代碼,里面包括了I2C芯片(MAX5417)及1 wire sensor、AD驅(qū)動(dòng)的源代碼！稍作改動(dòng)就能用于自己的產(chǎn)品開(kāi)發(fā)中！.22. 這是利用Mifare SDK開(kāi)發(fā)的讀寫(xiě)基于ISO14443標(biāo)準(zhǔn)RF卡的程序。.23. 這是用于Mifare卡開(kāi)發(fā)的programmer reference和DLL文件.24. C51單片機(jī)用C語(yǔ)言編寫(xiě)的SPI例程.25. CPLD7256的例子程序.26. SUMSUNG S3C44B0X ARM7的一個(gè)RTC實(shí)時(shí)時(shí)鐘的顯示和修改的例程.27. 哈工大智能電動(dòng)車(chē)軟件的源代碼.28. 這是有關(guān)單總線(xiàn)數(shù)字溫度芯片DS18B20的keilC和ASM匯編的混合編程.29. 這是一個(gè)在51單片機(jī)上用匯編實(shí)現(xiàn)的除法程序。.30. Chapter 5 "Construction case with USB host system that handles USB controller SL811" sample progra.31. "TCP/IP + Ethernet network equipment design method" sample program.32. JAPAN "RTOS technology that learns with TOPPERS".33. JAPAN RTOS TOPPERS/JSP kernel 1.4 PreRelease simulation environment JSP kernel Windows simulation.34. 鍵盤(pán)掃描程序.35. pcb EMI 資料很好 是英文資料.36. PCB EMI 的防護(hù)的資料是英文的.37. pcb EMI 的防護(hù)的資料.38. pcb EMI 的防護(hù)的資料.39. pcb EMI 的防護(hù)的資料.40. pcb EMI 的防護(hù)的資料.
標(biāo)簽： 液壓系統(tǒng) 模擬機(jī) 分
上傳時(shí)間： 2013-06-12
上傳用戶(hù)：eeworm
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