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optical-fiber-transmission-
光纤传输特性 衰耗系数 是多模光纤和单模光纤最重要的特性参数之一,在很大程度上决定了多模和单模光纤通信的中继距离(Transmission characteristics of optical fiber attenuation)
- 2011-05-17 23:24:45下载
- 积分:1
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7-2-1-16-25
documents to read on developement issues.
- 2011-08-26 13:31:50下载
- 积分:1
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survey
这个对运动估计的一个综述性论文,IEEE论文,很权威,对于把握图像处理研究。很值得看看(In the motion estimation, a review paper, IEEE papers, very authoritative, for the capture image processing research. It is worth a look)
- 2013-07-31 15:34:32下载
- 积分:1
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Pivot-Point-Break-Strategy
光大证券--金融工程-股指期货量化交易策略研究:枢轴突破策略(Everbright Securities- financial engineering- Stock index futures quantify Trading Strategies: Pivot breakthrough strategy)
- 2012-06-13 17:04:01下载
- 积分:1
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lujingguihua
CAJ格式的,遗传算法的路径规划问题,需要的可以看一下(CAJ format, genetic algorithm path planning problem, the need to look at the can)
- 2008-08-07 15:18:37下载
- 积分:1
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GDBSCAN
research paper on bdscan
- 2013-01-31 02:40:54下载
- 积分:1
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biyesejitognxinxitong
中文摘要
正交频分复用( OFDM , Orthogonal Frequency Division
Multiplexing)是当前一种非常热门的通信技术。它即可以被看作是一种
调制技术,也可以被看作是一种复用技术。由于它具有抗多径衰落和频谱
利用率高的特点,因此被广泛应用于高速数字通信领域,比如应用于IEEE
802.11a无线局域网(WLAN)的物理层等等。
我的毕业设计的核心任务是:采用 FPGA 来实现一个基于OFDM 技术
的通信系统中的基带数据处理部分,即调制解调器。其中发射部分的调制
器包括:信道编码(Reed-Solomon 编码),交织,星座映射,FFT和插
入循环前缀等模块。我另外制作了相应的解调器,可以实现上述功能的逆
变换。
另外,我还对OFDM技术, IEEE 802.11a的标准文献,基于Simulink
的 OFDM 模型和仿真,ALTERA 公司的技术和 IP Core 的使用等方面进
行了研究。这些在文章中都有体现。
(Abstract
Orthogonal frequency division multiplexing (OFDM, Orthogonal the Frequency Division,
Multiplexing) is a very popular communication technology. It can be seen as a
Modulation technique can also be seen as a multiplexing technique. Because of its resistance to multipath fading and spectrum
High utilization characteristics, and is widely used in high-speed digital communications, such as used in IEEE
802.11a wireless LAN (WLAN) physical layer.
The core mission of my graduation project: FPGA to implement a technology based on OFDM
Communication systems in baseband data processing part, ie the modem. These emission part of the modulation
Includes: channel coding (Reed-Solomon coding), interleaving, constellation mapping, FFT and interpolation
Into the cyclic prefix modules. I also produced a corresponding demodulator can achieve the inverse of the above functions
Transformation.
In addition, OFDM technology, the IEEE 802.11a standard literature, based on Simulink
)
- 2012-05-20 21:58:18下载
- 积分:1
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AVS_ncm
AVS视频压缩标准,是国内AVS视频编解码算法组开发的具有自主知识产权的算法标准(AVS video compression standard, is the AVS video codec algorithm group developed a proprietary algorithm standard)
- 2013-06-26 07:58:00下载
- 积分:1
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SKC
IBM 云技术的说明,深入浅出地对IBM的易云技术进行讲解,有助于在中国地区的云技术推广和普及。(IBM cloud description of the techniques in layman' s language of IBM' s easy to cloud technology to explain, help in the cloud technology and the popularization of)
- 2012-06-27 14:54:30下载
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STK
针对STK(Satellite Tool Kit)软件在军事任务可视化仿真领域中的广泛应用,为充分挖掘
其显示潜能,重点解决了影响其三维场景构建的瓶颈问题,即三维场景数据格式的转换和数据的获取
优化。在分析构建STK 三维场景所需要素及其作用的基础上,分别对地形、地表纹理、三维模型和GIS
等四类数据格式进行分析,并利用多种辅助软件,系统地提出了由较通用格式数据向STK 所支持格式
数据的转换方法,以及在对各类原始数据的获取和转换过程中出现的问题进行处理的优化方法。最后通过实例验证表明该数据格式转换方法和数据优化方法行之有效,三维场景显示效果逼真。(STK (Satellite Tool Kit) software widely used in the field of military tasks, visual simulation, to fully tap its display potential, focus on resolving the bottlenecks that affect the construction of the three-dimensional scene, 3D scene data format conversion and data Get optimization. On the basis of the required elements and their role in the analysis of building STK three-dimensional scene analysis, respectively, of the four types of terrain, surface texture, three-dimensional model and GIS data format and use a variety of assistive software, the system proposed by the more common format The data support the format of the data to STK conversion method, as well as access to various types of raw data and conversion process issues deal with the optimization method. Finally, an example to show that the data format conversion method and data optimization method is effective, realistic three-dimensional scene display.)
- 2012-10-30 10:59:12下载
- 积分:1