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Adhoc
说明: 一篇介绍adhoc网络中DSR,AODV,DSDV协议的比较的文章,包括源代码和性能分析,(ADHOC networks introduced a DSR, AODV, DSDV protocol comparison article, including source code and performance analysis,)
- 2008-11-29 20:05:20下载
- 积分:1
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enhancedDEEC
enhanced DEEC matlab code for WSN
- 2017-05-31 06:56:30下载
- 积分:1
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ppt
本PPT着重研究了当前手游行业推广渠道的各种方式以及每种方式的利弊(The PPT focuses on the current hand travel industry marketing channels as well as the various ways the pros and cons of each approach)
- 2013-08-21 17:14:05下载
- 积分:1
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SMPTE_AFD_s2016-1-2007
SMPTE Standard AFD Description
- 2009-06-19 21:42:34下载
- 积分:1
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DudaHartToolboxUse
Duda Hart Tool Box Use manual
- 2015-09-30 00:24:04下载
- 积分:1
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m2m_sigmetrics12
m2m_sigmetrics12 物联网流量(m2m_sigmetrics12 M2M TRAFIC)
- 2013-05-24 10:46:21下载
- 积分:1
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传感器网络
传感器网络由大量能量有限的微型传感器节点组成.因此,如何保证在足够覆盖监测区域的同时延长网络的寿命,是一个需要解决的重要问题.为了达到这一目标,一种广泛采用的策略是选出部分能够足够覆盖监测区域的节点作为工作节点,同时关闭其他冗余节点.提出了一个数学模型,使得只要已知监测范围和节点感知半径的比值,就可以计算出达到服务质量期望所需要的节点数量.需要指出的是:与大部分研究覆盖的文献不同,该研究不基于节点的位置信息,因此可以极大地降低硬件成本,并且减少节点获得和维护位置信息的开销.模拟实验结果表明:在随机部署条件下,服务质量期望与实验所得到的实际覆盖度的误差不大于服务质量期望的2% 而对于相同的服务质量期望和实际覆盖度,计算所得的工作节点数量与实验所得的工作节点数量的误差小于计算数量的5%,这表明推导出的节点数量与服务质量期望之间的关系与模拟实验的结果相吻合.该结果可以广泛应用于传感器网络的节点部署、拓扑控制等领域中.()
- 2008-03-22 23:09:53下载
- 积分:1
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H6-inveter
提出一种新颖的高效率六开关逆变器(H6)拓扑,解决了无变压器单相光伏并网逆变器漏电流问题。 仿真与实验验证了该拓扑具有低共模电压、高质量的并网波形和高效率特征(This paper proposed a novel, high efficiency, transformerless single phase photovoltaic grid-connected inverter with six active switches that alleviate leakage current
issue. This topology embeds two unidirectional freewheel units
into the midpoint of a full bridge inverter, which provide novel freewheel paths and separate battery cells a grid during freewheeling time. )
- 2020-10-27 09:59:59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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Information-Storage-and--Management
EMC信息存储与管理 作 者:(美国)萨曼达 人民邮电出版社(EMC information storage and management of: (U.S.) Saman Da People' s Posts and Telecommunications Press)
- 2013-01-17 20:34:04下载
- 积分:1