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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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想必编写HDL的同志们用的着，规范的代码更合理。
想必编写HDL的同志们用的着，规范的代码更合理。-HDL preparation presumably used by the comrades, and norms of the code more reasonable.
- 2022-07-17 12:25:22下载
- 积分：1
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using VXD Technology File System Protection examples.
用VXD技术实现的文件系统保护程序示例.-using VXD Technology File System Protection examples.
- 2022-01-22 13:02:55下载
- 积分：1
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234页的资源管理系统的系统设计报告.非常详细和系统.非常值得系统设计人员看呀.吐血推荐的.不过你看不懂英文就有一点麻烦.但是里面的UML图你还是会好理解的....
234页的资源管理系统的系统设计报告.非常详细和系统.非常值得系统设计人员看呀.吐血推荐的.不过你看不懂英文就有一点麻烦.但是里面的UML图你还是会好理解的.-234 of the Resource Management System Design Report. Very detailed and systems. Very system designers at it. Hematemesis recommended. But if you have not read English a little troublesome. But with the UML map you will be better understood.
- 2022-03-05 23:51:06下载
- 积分：1
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从Parlay文档3G
PARLAY DOCUMENT FROM 3G
- 2022-12-20 09:00:03下载
- 积分：1
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简易员工管理系统,自己做的，好像不太好，请多原谅！
简易员工管理系统,自己做的，好像不太好，请多原谅！-Summary staff management system, they do seem too good, please forgive!
- 2022-07-01 15:22:09下载
- 积分：1
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WIFI信号应用很好的经验列表，在不同的介质信号衰减，覆盖的具体范围...
WIFI信号应用很好的经验列表，在不同的介质信号衰减，覆盖的具体范围-WIFI signal applications experience a good list of signal attenuation in different media, covering the specific scope of
- 2022-02-04 20:49:20下载
- 积分：1
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本文论述了嵌入式系统相关理论、嵌入式Linux 的基本概念, 主要阐述了采用嵌入式Linux 进行视频图像数据的捕获、存储、显示等。采用的关键技术包括V4L、f...
本文论述了嵌入式系统相关理论、嵌入式Linux 的基本概念, 主要阐述了采用嵌入式Linux 进行视频图像数据的捕获、存储、显示等。采用的关键技术包括V4L、framebuffer、数字图像格式变换等, 提出了图像数据格式的变换方法。同时阐述了具体的实现方法。-This article discusses the theory of embedded systems, embedded Linux basic concepts, mainly on the use of embedded Linux for video image data capture, storage, display and so on. The use of key technologies including V4L, framebuffer, such as digital image format transformation, the image data format transformation method. At the same time on a specific method.
- 2022-04-22 20:33:04下载
- 积分：1
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按功能目标的不同可将电子政务的系统功能分为以下三类：内容管理（Content Management）、协同处理（Collaboration）与内务服务（Busi...
按功能目标的不同可将电子政务的系统功能分为以下三类：内容管理（Content Management）、协同处理（Collaboration）与内务服务（Business service）。-according to the function of the different objectives of the e-government system functions are divided into the following three categories : content management (Content Management), synergistic processing (Collaboration) and the House (Business service).
- 2022-08-22 00:02:40下载
- 积分：1
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摘要:报适了一种直接序列软扩频调制解调器的SAw实现方案，并给出了相应的实验结果。该方案刘一提高系统抗干扰能力、频宽利川等方而均具有与其他技术不同的特点。同时，...
摘要:报适了一种直接序列软扩频调制解调器的SAw实现方案，并给出了相应的实验结果。该方案刘一提高系统抗干扰能力、频宽利川等方而均具有与其他技术不同的特点。同时，该技术方案为进一步研究DS-0FDM下了基石出。
-Abstract: al fitness, a direct-sequence spread-spectrum modem soft Saw the realization of the program, and gives the corresponding experimental results. Liu of the program to improve system anti-interference ability, such as bandwidth Lichuan side and with other technologies have different characteristics. At the same time, the technology program for further study on DS-0FDM out under the foundation.
- 2022-05-23 04:59:29下载
- 积分：1
