Description: 这是一个在利用密钥产生随机序列，他能实现在伪随机序列的产生-This is a key generated using random sequence, he can achieve the pseudo-random sequence generation Platform: |
Size: 2048 |
Author:杨永 |
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Description: 伪随机数的产生程序 有m序列还有同余序列等等 用与嵌入信息位置的选择或密钥的制作-Pseudo-random number generation process has m sequences are congruent with and embedded in sequence and so the choice of location information or the production of key Platform: |
Size: 5120 |
Author:长风 |
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Description: 随着蜂窝移动通信市场的巨大发展，下一代通信将是移动多媒体通信。这种情况产生了一个问题，如何对语音信源以外的多媒体信源进行功率控制。在探讨这个问题上，我们引入微观经济学中的数学模型和概念以及博弈论理论。在本文中，电话的通话质量被称为“效度”，对于一个CDMA电话通信的分布式功率控制被看作是一个‘非协作的博弈’。-CDMA mobile communication system is a technology which will be used in the next-generation communications system, so wideband CDMA technology has been unprecedented attention, and a large number of improved algorithm to improve the performance of CDMA system has emerged in its various research on key technologies. Platform: |
Size: 15360 |
Author:飞云 |
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Description: 本文在分析移动无线信道衰落特性的基础上,阐述了OFDM系统的基本原理,主要研究了OFDM通信系统中的基于导频符号的信道估计问题,分析了几种经典的信道估计算法以及相关的关键技术环节。 在此基础上介绍了OFDM技术在现实中的一个应用——WLAN IEEE802.11a系统模型,利用Matlab仿真软件完成OFDM系统信号生成、噪声生成、导频插入、循环前缀、调制、解调等部分的设计,最后结合计算机仿真对系统关键技术(导频、循环前缀、估计算法)的有效性和可行性进行了全面的分析与比较。适合matlab研究-Based on the analysis of mobile channel fading characteristics based on the OFDM system on the basic principles of research in the OFDM communication system of the pilot symbols based on channel estimation problem, an analysis of several classical channel estimation algorithm and the associated key technical links. On this basis, introduced OFDM technology in a practical application- WLAN IEEE802.11a system model, using Matlab simulation software to complete OFDM signal generation, noise generation, pilot insertion, cyclic prefix, modulation, demodulation and other parts of the design, the final combination of computer simulation of the system of key technologies (pilots, cyclic prefix, it is estimated that algorithm) the effectiveness and feasibility of a comprehensive analysis and comparison. Suitable for research matlab Platform: |
Size: 1339392 |
Author:赵洪森 |
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Description: special AES key generation algorithm for using secure transformation of the data from one user to another Platform: |
Size: 1024 |
Author:Madhuram |
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Description: 正交频分复用(OFDM)是第四代移动通信的核心技术,它是实现宽带无线通信和多媒 体业务发展的基础。对OFDM 技术的基本原理，关键技术以及实现进行了研究，并且通过 matlab 中的通信仿真系统simulink 对OFDM 系统进行了模拟和分析，直观和形象地得到了 OFDM 系统在时域和频域的传输性能，得出的结果表明OFDM 系统可以明显地表现出抗多 径效应引起的频率选择性衰落和提高了频谱利用率，这一特性使得它能够在高数据传输速率 的无线信道中发挥优势。-Orthogonal Frequency Division Multiplexing (OFDM) is the fourth generation mobile communication core technology, which is broadband wireless communications and multimedia development. The basic principle of OFDM technology, key technology and implementation have been studied, and by matlab simulink simulation system in the OFDM communication system was simulated and analyzed, intuitive, and get the image of the OFDM system in time domain and frequency-domain transmission performance , the results show that OFDM system can be apparent in the anti-multipath effect caused by frequency selective fading and improve the spectrum efficiency, this allows it to transmit at high data rate wireless channel advantage. Platform: |
Size: 258048 |
Author:foxlili |
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Description: 用间断有限元方法求解二维Euler方程。
算例是一个圆柱绕流问题。压缩文件里面还包含了一个用MATLAB写的网格生成程
序，只需要做很小的改动就可以生成稀疏程度不同的网格。
程序还有些问题如下：
1. 因为没有对边界处作处理，所以计算的残差不会收敛到一个给定的小数，如
0.001等。当最大残差为0.1左右时，按下键盘上的ESC键，程序计算结束，会输出
一个文件Result.dat，用tecplot软件打开这个文件，可以得到一些结果，如流线
等。因为结果不收敛，在圆柱的后面会有两个涡出现，如果计算时间更长，会有
涡脱落的现象出现。如果想计算收敛，则需要对边界作特殊处理。处理方法见
2006年的文献High-order accurate implementation of solid wall boundary
conditions in curved geometries 。或者使用高阶的单元，如6节点三角形单元
。
2. 现在还不能捕捉激波，因为没有加限制器。
如果您在这个程序的基础上解决了上面提到的问题，请联系我，也共享一下程序
哦 ^_^-Send a written discontinuous finite element program--- for solving two-dimensional Euler equations
The attachment is a C language program I wrote it myself. Discontinuous finite element method for solving two-dimensional Euler equations.
Example is the flow around a cylinder. Zip file which also contains the mesh generation process to write a MATLAB
Sequence, just do small changes can generate sparse different grid.
The program also some problems as follows:
Because there is no boundary, so the residuals of the calculation will not converge to a given decimal, such as
0.001 and so on. When the maximum residual is about 0.1, press the ESC key on the keyboard, the program calculates the end, will output
A file Result.dat, the use tecplot software to open this file, you can get some results, such as flow lines
And so on. Because the result does not converge, there will be two in the back of the cylinder vortices appear, if the calculation of longer, there will be
Th Platform: |
Size: 38912 |
Author:刘刚 |
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Description: OFDM
MIMO-OFDM is a key technology for next-generation cellular communications (3GPP-LTE, Mobile WiMAX, IMT-Advanced) as well as wireless LAN (IEEE 802.11a, IEEE 802.11n), wireless PAN (MB-OFDM), and broadcasting (DAB, DVB, DMB). In MIMO-OFDM Wireless Communications with MATLAB, the authors provide a comprehensive introduction to the theory and practice of wireless channel modeling, OFDM, and MIMO, using MATLAB programs to simulate the various techniques on MIMO-OFDM systems Platform: |
Size: 2048 |
Author:raju |
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Description: 本文以GPS中频数字信号的仿真为目标,以Matlab/Simulink为平台,对真实环境
下中频信号的生成算法!接收算法进行了研究和仿真实现"论文详细论述了GPS中频
数字信号的数学模型!导航信号的误差模型,和信号仿真时应注意的关键问题,给出了
中频信号软件模拟器结构"同时,论文对中频信号的接收算法也进行了简单的研究,并
用仿真生成的数字中频信号对软件接收机的捕获和跟踪性能进行了验证"实验结果表明
该系统基本实现了GPS中频信号的产生和接收功能,接收端能正确解扩解调,能在一
定精度下得到伪码初始相位和载波频率"
-GPS IF digital signal simulation in Matlab/Simulink platform, the paper discusses in detail the mathematical model of the GPS IF digital signal received IF signal generation algorithm in a real environment! Algorithm research and simulation! Navigation error model of the signal, and the signal simulation should pay attention to the key issues, given the structure of the IF signal simulator software the same time, the paper also the IF signal reception algorithm simple, and digital IF signal generated by the simulation software The receiver acquisition and tracking performance is verified experimental results show that the system is the basic realization of the GPS IF signal generating and receiving functions, the receiving side can correctly despread demodulation, the initial phase and carrier frequency of the pseudo-code can be obtained under certain precision " Platform: |
Size: 5351424 |
Author:luchan |
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Description: MIMO-OFDM is a key technology for next-generation cellular communications (3GPP-LTE,
Mobile WiMAX, IMT-Advanced) as well as wireless LAN (IEEE 802.11a, IEEE 802.11n),
wireless PAN (MB-OFDM), and broadcasting (DAB, DVB, DMB). This book provides a
comprehensive introduction to the basic theory and practice of wireless channel modeling,
OFDM, and MIMO, with MATLAB programs to simulate the underlying techniques on
MIMO-OFDM systems. This book is primarily designed for engineers and researchers who are
interested in learning various MIMO-OFDM techniques and applying them to wireless
communications. It can also be used as a textbook for graduate courses or senior-level
undergraduate courses on advanced digital communications. The readers are assumed to have
a basic knowledge on digital communications, digital signal processing, communication
theory, signals and systems, as well as probability and random processes. Platform: |
Size: 11264000 |
Author:Robin |
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Description: MIMO-OFDM is a key technology for next-generation cellular communications (3GPP-LTE,
Mobile WiMAX, IMT-Advanced) as well as wireless LAN (IEEE 802.11a, IEEE 802.11n),
wireless PAN (MB-OFDM), and broadcasting (DAB, DVB, DMB). This book provides a
comprehensive introduction to the basic theory and practice of wireless channel modeling,
OFDM, and MIMO, with MATLAB programs to simulate the underlying techniques on
MIMO-OFDM systems. This book is primarily designed for engineers and researchers who are
interested in learning various MIMO-OFDM techniques and applying them to wireless
communications. It can also be used as a textbook for graduate courses or senior-level
undergraduate courses on advanced digital communications. The readers are assumed to have
a basic knowledge on digital communications, digital signal processing, communication
theory, signals and systems, as well as probability and random processes. Platform: |
Size: 5013504 |
Author:werad |
Hits:
Search - key generation in matlab