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摘要:基于通信技术的列车运行控制系统(CBTC)是铁路信号的发展方向，交频分复用
OFDM)是一种无线环境下的高速传输技术，它对高速列车控制信息传输中卞要受...
摘要:基于通信技术的列车运行控制系统(CBTC)是铁路信号的发展方向，交频分复用
OFDM)是一种无线环境下的高速传输技术，它对高速列车控制信息传输中卞要受到的由于多
径传播引起的快衰落所产生的影响有很强的抵抗能力.本文首先介绍了OFDM技术的发展和
基本原理，然后在计算机上用M atlal〕对其性能进行了仿真，仿真中将OFDM与传统的单载波
调制方式―i1，交振幅调制( 1frQAM)对抗多径十扰的性能进行了比较，最后分析了一者的仿真结果.
-Abstract: Based on the communication technology train operation control system (CBTC) is a railway signal direction for the development of cross-frequency division multiplexing OFDM) is a wireless environment of high-speed transmission technology, its high-speed train control information transmission Bian be subject to the Due to the spread of multi-path fast fading caused by the impact of a strong resistance to diseases. This paper first introduces the OFDM technology development and the basic principles, and then on the computer〕 M atlal use its performance simulation will OFDM with the traditional single-carrier modulation-i1, cross-amplitude modulation (1frQAM) against multi-path interference of the 10 properties were compared with a final analysis of
- 2022-08-24 10:19:13下载
- 积分：1
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某220KV区域性变电所一次系统设计。主变为2×120MVA，电压比为220/121/10.5KV，容量比为100/100/50，本期工程一次建成，设计中留有扩...
某220KV区域性变电所一次系统设计。主变为2×120MVA，电压比为220/121/10.5KV，容量比为100/100/50，本期工程一次建成，设计中留有扩建的余地。-220KV substation of a regional one system design. Main becomes 2 × 120MVA, voltage ratio 220/121/10.5KV, the capacity ratio of 100/100/50, the current project once completed, the design leaves room for expansion.
- 2022-01-31 10:32:24下载
- 积分：1
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： 通过 L V D S ( 低压差分信号) 传输方案与单个 L C o S ( 硅基液晶) 分时分色显示， 设计主电路
与头盔结构分离的单 L C o...
： 通过 L V D S ( 低压差分信号) 传输方案与单个 L C o S ( 硅基液晶) 分时分色显示， 设计主电路
与头盔结构分离的单 L C o S 硅片彩色头盔显示系统。-: Through the LVDS (Low Voltage Differential Signaling) transmission scheme with a single LC o S (Liquid Crystal on Silicon) color separation time showed that the design of main circuit and the structure of the separation of single-helmet LC o S silicon color helmet display system.
- 2022-01-21 19:50:04下载
- 积分：1
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NetJava.cn MMS Gateway Access System
NetJava.cn彩信网关接入系统-NetJava.cn MMS Gateway Access System
- 2022-09-20 00:40:03下载
- 积分：1
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Windows的资源管理器想必大家都用过，该程序的窗口一分为二，左边的窗口显示本机当前所有驱动器以及驱动器中的所有文件夹，当用户单击文件夹后，如果该文件夹下面还...
Windows的资源管理器想必大家都用过，该程序的窗口一分为二，左边的窗口显示本机当前所有驱动器以及驱动器中的所有文件夹，当用户单击文件夹后，如果该文件夹下面还有子文件夹，则上层文件夹展开显示下级的文件夹；否则，右边的窗口显示选择文件夹下的文件。该文档提供了实现方法。-Windows resource manager must have all used, the procedure is divided into two one window. The left window shows the current machine and all Drivers Drivers of all folders when users click the folder, If the folder Read Documents folder, the folder launched upper and lower levels show the folder; Otherwise, the right to choose a window shows folder of documents. The document provides a method.
- 2022-03-05 13:49:30下载
- 积分：1
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无刷直流有用的设计
useful design for BLDC
- 2023-03-07 20:35:03下载
- 积分：1
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在本论文中我们根据3GPP协议TR25.813,25.814，25.913和25.914的要求和参数，设计搭建了一个基于SC...
在本论文中我们根据3GPP协议TR25.813,25.814，25.913和25.914的要求和参数，设计搭建了一个基于SC-FDMA的准静态系统级仿真器.
-In this paper, we according to 3GPP agreement TR25.813, 25.814,25.913 and 25.914 of the requirements and parameters, designed to build an SC-FDMA-based quasi-static system-level simulator.
- 2022-09-30 05:55:05下载
- 积分：1
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Project "Control a roboter via WLAN with a GUI and a webcam"
Project "Control a roboter via WLAN with a GUI and a webcam"
- 2022-03-20 10:49:11下载
- 积分：1
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BOSS storage scheme (IBM), have application in Jiangxi.
BOSS存储方案(IBM),在江西有应用.-BOSS storage scheme (IBM), have application in Jiangxi.
- 2022-03-02 12:44:22下载
- 积分：1
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是一个单一的P89LPC938
The P89LPC938 is a single-chip microcontroller, available in low cost packages, based on
a high performance processor architecture that executes instructions in two to four clocks,
six times the rate of standard 80C51 devices. Many system-level functions have been
incorporated into the P89LPC938 in order to reduce component count, board space, and
system cost.
- 2022-07-13 08:11:06下载
- 积分：1
