Description: Signal processing theory plays an increasingly central role in the development of modern telecommunication and information processing systems, and has a wide range of applications in multimedia technology, audio-visual signal processing, cellular mobile communication, adaptive network management, radar systems, pattern analysis, medical signal processing, financial data forecasting, decision making systems, etc. The theory and application of signal processing is concerned with the identification, modelling and utilisation of patterns and structures in a signal process. The observation signals are often distorted, incomplete and noisy. Hence, noise reduction and the removal of channel distortion is an important part of a signal processing system. The aim of this book is to provide a coherent and structured presentation of the theory and applications of statistical signal processing and noise reduction methods. Platform: |
Size: 3711187 |
Author:jiezhao |
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Description: 对具有随机噪声的二阶系统的模型辨识，进行标幺化以后系统的参考模型差分方程为： y(k)=a1*y(k-1)+a2*y(k-2)+b*u(k-1)+s(k) 式中，a1=0.3366,a2=0.6634,b=0.68,s(k)为随机噪声。由于神经网络的输出最大为1，所以，被辨识的系统应先标幺化，这里标幺化系数为5。采用正向建模(并联辨识)结构，神经网络选用3-9-9-1型，即输入层i，隐层j包括2级，输出层k的节点个数分别为3、9、9、1个；由于神经网络的最大输出为1，因此在辨识前应对原系统参考模型标么化处理，辨识结束后再乘以标么化系数才是被辨识系统的辨识结果。-of random noise with the second-order system model, per-unit system after the reference model differential equation : y (k) = y* a1 (k-1) a2* y (k-2) b* u (k-1) s (k)- style, = 0.3366 a1, a2 = 0.6634, b = 0.68, s (k) as random noise. Because the neural network for a maximum output, therefore, the identification system should be per-unit, per-unit here coefficient of 5. Forward modeling (Parallel identification) structure, neural network-based selection 3-9-9-1, i input layer, hidden layer, including two j, k output layer to the number of nodes 3,9,9,1; The neural network the biggest losers up to one, in the original deal before Identification System Reference Model S Mody treatment, then multiplied by the end of Identification Standard Mody coefficient was recognition system is the ide Platform: |
Size: 874496 |
Author:孙荣超 |
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Description: 该程序比较人性化，有个友好界面，能加载图像，并根据图像训练Hopfield神经网络，你也可以通过添加噪声给图像，以判断它的识别率。-Comparison of the program user-friendly, has a friendly interface that can load images, and in accordance with the training images Hopfield neural network, you can also add noise to images, to determine its recognition rate. Platform: |
Size: 8192 |
Author:林盈 |
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Description: 假设在一个ad hoc网络中，移动节点的发射功率PTx总是恒定的。要发送数据的移动节点总是先监听信道，测量接收到的信号功率X，其中X= I + N, I为接收到的干扰，N是噪声。移动节点只有在X＜INThre时，才可以发射。式中，INThre为背景噪声门限。
在仿真中，我们规定每个移动节点的发射功率是常数，PTx = 1W；接收节点接收机的灵敏度Smin = -80 dBm；信号质量 min = 2 dB；系统的背景噪声门限INThre = 1.2e-10。
-Assuming in an ad hoc network, mobile node s transmission power is always constant PTX. To send data to the mobile node always monitor channel, measuring the received signal power X, which X = I+ N, I was received interference, N is the noise. Mobile node only when X <INThre when it is fired. Where, INThre threshold for background noise. In the simulation, we require that each mobile node s transmission power is constant, PTx = 1W receiver node receiver sensitivity Smin =-80 dBm signal quality Platform: |
Size: 7168 |
Author:飞 |
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Description: 根据有无固定基础设施，无线局域网又可分为BSS (Basic Service Set)和IBSS (Independent Basic Service Set)。我们要研究的ad hoc网络属于后者。假设在一个ad hoc网络中，移动节点的发射功率PTx总是恒定的。要发送数据的移动节点总是先监听信道，测量接收到的信号功率X，其中X= I + N, I为接收到的干扰，N是噪声。移动节点只有在X＜INThre时，才可以发射。式中，INThre为背景噪声门限。
在仿真中，我们规定每个移动节点的发射功率是常数，PTx = 1W；接收节点接收机的灵敏度Smin = -80 dBm；信号质量 min = 2 dB；系统的背景噪声门限INThre = 1.2e-10。
-According to the availability of fixed infrastructure, wireless local area network can be divided into BSS (Basic Service Set) and IBSS (Independent Basic Service Set). We have to study the ad hoc network belong to the latter. Assuming in an ad hoc network, mobile node s transmission power is always constant PTX. To send data to the mobile node always monitor channel, measuring the received signal power X, which X = I+ N, I was received interference, N is the noise. Mobile node only when X <INThre when it is fired. Where, INThre threshold for background noise. In the simulation, we require that each mobile node s transmission power is constant, PTx = 1W receiver node receiver sensitivity Smin =-80 dBm signal quality Platform: |
Size: 7168 |
Author:何炳钦 |
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Description: Signal processing theory plays an increasingly central role in the development of modern telecommunication and information processing systems, and has a wide range of applications in multimedia technology, audio-visual signal processing, cellular mobile communication, adaptive network management, radar systems, pattern analysis, medical signal processing, financial data forecasting, decision making systems, etc. The theory and application of signal processing is concerned with the identification, modelling and utilisation of patterns and structures in a signal process. The observation signals are often distorted, incomplete and noisy. Hence, noise reduction and the removal of channel distortion is an important part of a signal processing system. The aim of this book is to provide a coherent and structured presentation of the theory and applications of statistical signal processing and noise reduction methods. Platform: |
Size: 3710976 |
Author:jiezhao |
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Description: 设定无线接入点能够始终提供最大吞吐量，终端节点的冗余通信模块各自的网络信道信噪比值随机变化，由此计算得冗余网络各自的CHF值。CHF切换机制根据冗余网络各自的采样值大小进行切换判决，考虑门限的CHF切换机制根据设定的上下切换门限值进行切换判决-Configure wireless access points can always provide the maximum throughput, end-node redundant network communication module respective channel signal to noise ratio value of random changes, which calculated the respective redundant network CHF values. CHF redundant network switching mechanism in accordance with their respective values of the size of the sampling switch decision, consider the threshold of CHF switch mechanism according to set upper and lower limit switch door switch decision Platform: |
Size: 1024 |
Author:王一 |
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Description: 教学实验源代码，提供对滑动窗口协议的实验演示，协议分层和协议软件的设计与实现有基本的认识利用所学数据链路层原理，自己设计一个滑动窗口协议并在仿真环境下编程实现有噪音信道环境下的
可靠的双工通信。信道模型为 8000bps 全双工卫星信道，信道传播时延 270 毫秒，信道误码率为 10-5，信道提供字节流传输服务，网络层分组长度在240~256字节范围-Teaching experiment source code, on the Sliding Window Protocol provides experimental demonstration of the agreement stratification and protocol software design and implementation of a basic understanding of the use of the data link layer principle, its own design of a sliding window protocol and simulation programming environment the realization of the noise channel environment duplex reliable communication. Channel model for 8000bps full-duplex satellite channel, channel propagation delay of 270 ms, channel bit error rate of 10-5, byte-stream channel to provide transmission services, network layer packet length in the range of 240 ~ 256 bytes Platform: |
Size: 414720 |
Author:Tony Yau |
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Description: 本书较为详细的介绍了移动通信的基本知识，内容包括移动通信中的调制解调，信道传播特性，抗衰落技术，噪声干扰，组网技术，cdma,tdma,fdma等多址技术。-The book describes in some detail the basic knowledge of mobile communications, including mobile communications in the modulation and demodulation, channel propagation characteristics, anti-fading technology, noise interference, network technology, cdma, tdma, fdma such as multiple access technology. Platform: |
Size: 15280128 |
Author:朱丽平 |
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Description: 该程序是卡曼滤波法在语音处理上的应用,能有效的去除噪声,达到语音增强的目的!-The program is Kaman filtering method in the voice processing application, can effectively remove the noise, to achieve the purpose of speech enhancement! Platform: |
Size: 1024 |
Author:zhjuna |
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Description: 用于图像识别的新型神经元网络
提出了一种用于图像识别的映封正交神经元网络。
在一般情况下待识别的样本空间的维数相当大,
为了有效地进行识别,必须把样本空间的维数降下来。目前常用的方法就是特征提取法,本文采用映射正交过程把样本空间映射成正交分类空间,并在此基础上,采用网络进行图像分类。计算机上模拟结果表明此网络县有时缺损和噪声图像进行正确识别的能力-Image recognition for a new type of neural network used in a video image recognition of the orthogonal neural network closure. In general, the sample space to be recognition of the considerable dimensions, in order to effectively identify, must be the dimension of sample space down. Commonly used method at present is the feature extraction method, this paper, the process of mapping the sample space orthogonal mapping classification into orthogonal space, and on this basis, the use of network image classification. Computer simulation results show that the county and sometimes the network image defects and noise of the ability to correctly identify Platform: |
Size: 441344 |
Author:wang kun |
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Description: 采用MATLAB实现Hopfield神经网络算法，并用其来进行字符识别。实验包括单个噪声字符的识别和多个噪声字符的识别两部分。并从这两方面对实验数据进行了分析与对比。-Hopfield neural network implementation using MATLAB algorithm, and use it to carry out character recognition. Experiments included a single noise, character recognition and character identification number of the noise in two parts. From both the experimental data were analyzed and compared. Platform: |
Size: 3072 |
Author:caoliang |
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Description: This dissertation contributes a jam-resistant communications protocol for use in
mobile ad-hoc network (MANET). Speci c focus is given to the network layer rout-
g of packets within a MANET. A MANET is a self-organizing multi-hop wireless
twork that is comprised of many mobile hosts communicating wirelessly. As a result
their mobility and dependence on wireless communications, network layer routing
especially prone to errors. An algorithm has been developed using the concept concurrent codes to allow for jam-resistant wireless communications without a pre-
shared secret. The algorithm allows for the recovery of messages even in the presence
of signi cant noise. Experimental results show that a cross-layer protocol designed
to take advantage of this property allows for more e ective communications in noisy
environments such as disaster sites where current network protocols experience signif-
icant packet loss rates. Ultimately, this research presents a communications protocol Platform: |
Size: 6118400 |
Author:venkata |
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Description: Cognitive Radio systems with liscense and Rental Users in addtion to adding noise and attenuation.(Beautiful)-Cognitive Radio systems with liscense and Rental Users in addtion to adding noise and attenuation.(Beautiful) Platform: |
Size: 2048 |
Author:M.Shehab |
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Description: 光纤通信以其损耗低、高带宽、抗电磁干扰、保密性好等优点越来越多地应用在视频通信中[1～ 5 ]. 针对
光纤综合业务传输平台, 本文提出了一种将三路视频信息复用为一路视频信息的数字复接器的硬件电路
设计. 提高了传输容量和传输效率, 达到抗干扰、抗噪声的能力, 从而改善了传输平台的环境适应性及工作
性能. 该复接器硬件电路的设计采用EDA 技术, 以FPGA 器件为载体, 使用VHDL 硬件描述语言进行电路-Optical fiber communication with its low loss, high bandwidth, anti-electromagnetic interference, security and good benefits are increasingly used in video communications in the [1 ~ 5]. For the fiber optic integrated services delivery platform, this paper presents a three-way will be video information re-used as the way digital video multiplexer hardware circuit design. to improve the transmission capacity and transmission efficiency, to achieve anti-jamming, anti-noise capability, thereby improving the transmission platform, environmental adaptability and work performance. The re- connector hardware circuit design using EDA technology to FPGA devices as the carrier, using the VHDL hardware description language circuit Platform: |
Size: 325632 |
Author:renxiang |
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Description: 移动通信中排队的阻塞率编程计算，运用C语言编写-Mobile Communications line of blocking probability calculation program, using C language. . . . . Platform: |
Size: 1024 |
Author:hehe |
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Search - noise in network