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.
标签： Multi-Carrier Spectrum Spread 2007
上传时间： 2020-05-31
上传用户：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.
标签： Transmission Handbooks Systems Design
上传时间： 2020-06-01
上传用户：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).
标签： Multiplexing Wavelength Division
上传时间： 2020-06-01
上传用户：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
标签： pw1555
上传时间： 2022-02-14
上传用户：
对某四轮独立驱动电动汽车轮毂电机进行研究,设计一种永磁无刷直流电机控制器.以STM32F103RBT6芯片为基础,对电机驱动电路、采样电路和保护电路分别进行硬件设计与分析;同时,采用模块化软件设计方案,对该控制器的软件系统进行升级.实验验证表明:所设计的电机控制器能使电机响应迅速、转速稳定、无超调,且电动车动力输出性能良好.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.
上传时间： 2022-03-26
上传用户：qingfengchizhu
实验教学一直是工科教学中不可或缺的组成部分,对培养学生的动手能力,独立思考能力,创新思维与发散思维具有重要的作用。针对目前电路教学实验中电路仿真实验与实物电路实验各自独立,无法统一问题,提出将仿真电路实验与实物电路实验有机的结合同步操作,并使用Web发布实现远程实验操作。采用Multisim作为电路实验仿真平台,NI Eiviss II作为实物电路实验硬件平台,运用LabVIEW整合Multisim电路仿真实验与实物电路实验,实现仿真与实物实验有机结合,两种实验可同步进行。学生在仿真实验中先可探索实验,然后做实物实验。同时运用LabVIEW开发出实验过程人机交互操作接口界面,使用过程中效果良好。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.
上传时间： 2022-04-05
上传用户：
VIP专区-嵌入式/单片机编程源码精选合集系列（40）资源包含以下内容：1. epson公司的一个关于s1d13706的低层驱动程序.2. ads1.2的一个工程.3. 一些FPGA的扩展电路原理图.4. 一些DSP的c语言源程序.5. 凌阳单片机声控小车源码,对于想开发声控小车的人来说,是相当有用的.6. ATMEL的下载线制作和下载软件,有需要的可以来看.7. 一个比较老的C语言编译器,WAVE的老板本仿真器只能用他.8. LM8361、TMS3450、TMS1943数字钟电路.9. 该程序代码实现对Flash Rom AM29LV160烧写数据的功能.10. 嵌入PIC16F77的激光传感器程序RS485输出.11. PIC16F77单片机I2C读写程序.12. 这是家用摄像头的源程序.13. lwIP is a small Independent implementation of the TCP/IP protocol suite that has been developed by.14. 详细的MiniGUI源代码.15. 日本的嵌入式实时操作系统UITRON3.0 该系统以得到几十亿片的应用业绩.16. IEC61131-3标准说明.17. 一线通讯协议的c51例子程序源代码.18. C字符串底层函数的实现。对一些想了解C的低层函数的人很有帮助.19. 使用vhdl语言编写的交通灯控制程序.20. 使用C语言编写的单片机控制LCD显示程序.21. 此程序是一底层开发驱动代码,里面包括了I2C芯片(MAX5417)及1 wire sensor、AD驱动的源代码！稍作改动就能用于自己的产品开发中！.22. 这是利用Mifare SDK开发的读写基于ISO14443标准RF卡的程序。.23. 这是用于Mifare卡开发的programmer reference和DLL文件.24. C51单片机用C语言编写的SPI例程.25. CPLD7256的例子程序.26. SUMSUNG S3C44B0X ARM7的一个RTC实时时钟的显示和修改的例程.27. 哈工大智能电动车软件的源代码.28. 这是有关单总线数字温度芯片DS18B20的keilC和ASM汇编的混合编程.29. 这是一个在51单片机上用汇编实现的除法程序。.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. 键盘扫描程序.35. pcb EMI 资料很好 是英文资料.36. PCB EMI 的防护的资料是英文的.37. pcb EMI 的防护的资料.38. pcb EMI 的防护的资料.39. pcb EMI 的防护的资料.40. pcb EMI 的防护的资料.
上传时间： 2013-06-12
上传用户：eeworm
