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MISO_Capacity
MIMO指多输入多输出，MIMO技术大致可以分为两类：发射/接收分集和空间复用。传统的多天线被用来增加分集度从而克服信道衰落，具有相同信息的信号通过不同的路径被发送出去，在接收机端可以获得数据符号多个独立衰落的复制品，从而获得更高的接收可靠性。这种技术往往要结合多天线技术，而多天线技术在移动通信中得到了广泛的研究。(MIMO refers to Multiple Input Multiple Output, MIMO technology can be broadly classified into two categories: transmit/receive diversity and spatial multiplexing. Traditional multi-antenna was used to increase the degree of diversity to overcome channel fading, the signal with the same information through different paths have been sent in the receiver-side data symbols can be multiple independent copies of the decline, which was higher reception reliability. This technology often have to combine multi-antenna technology, and multi-antenna technology in mobile communication has been widely studied.)
- 2008-06-01 20:34:32下载
- 积分：1
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Voronoin 3D matlab
说明： matlab生成泰森多边形,并到处到txt文件，可用于晶体塑性有限元建模(generate a voronoi model and export to files)
- 2020-06-25 20:00:02下载
- 积分：1
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57578869matlab--3D-reconstruction
说明： 基于matlab三维重建代码，及基础知识的了解和掌握(three-dimensional reconstruction)
- 2019-05-15 14:00:32下载
- 积分：1
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ofdm_simulation_with_matlab
OFDM信道估计和均衡的仿真程序，包括MMSE、LS、ZF等方法(OFDM channel estimation and balanced simulation program, including the MMSE, LS, ZF and other methods)
- 2013-10-31 22:07:13下载
- 积分：1
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WindTurbineBlockset
非常好的风力机模型，国外实验室下载，可根据需要组合。(Very well wind turbine model, download laboratories abroad, according to portfolio required.)
- 2021-04-16 14:58:54下载
- 积分：1
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寻找起伏度最佳窗口arcgis
均值变点是统计学中常用的变点分析方法，其主要思想如下：
假设有一组数据，随着某个指标变化（增大），其值逐渐增加并趋于稳定，如何判断在这个过程中是否出现了突变的情况，异样的情况？
均值变点分析方法提供了一种思路，大概如下：
1 计算总的均值和方差；
2 循环将这组有序数据分成两组，X1，X2
计算各组的均值和方差，
计算总方差与分组方差之和的差；
3 得到变点(The change point of mean is a commonly used change point analysis method in statistics. Its main ideas are as follows:
If there is a set of data, as a certain index changes (enlargement), its value increases gradually and tends to be stable. How to judge whether there is a sudden change in the process and the unusual situation?
The mean change point analysis method provides a way of thinking, which is as follows:
1 the total mean and variance are calculated.
The 2 cycle divides the ordered data into two groups, X1, X2.
Calculate the mean and variance of each group.
The difference between the sum of the total variance and the group variance is calculated.
3 get a change point)
- 2021-04-15 14:18:54下载
- 积分：1
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2
说明： 2. 关于无线信道的多普勒谱，请回答以下问题：
(1) 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠。请描述产生混叠的各种原因；
(2) 无线信道中的多普勒谱有一种经典谱(classic spectrum)，请解释产生这种谱形状的机理；
(3) 请用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请描述：自己用计算机产生的经典谱是正确的依据。(2. Regarding the doppler spectrum of the wireless channel, please answer the following questions:
(1) in some wireless channels, doppler frequency shift will cause aliasing of the output signals of the wireless channel.Describe the various causes of aliasing;
(2) there is a classic spectrum in the doppler spectrum in the wireless channel, please explain the mechanism of producing this spectrum shape;
(3) please use Simulink tool to write code (s-function mode) to generate a single-path Rayleigh channel, whose doppler spectrum is the classical spectrum, in which the moving rate is 120km/h.And please describe: your own computer generated classical spectrum is the correct basis.)
- 2019-01-15 10:49:35下载
- 积分：1
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RFID门禁控制
为了系统的安全性，为门禁控制系统增加了登录功能，通过从后端数据库录入管理员信息，包括用户名与密码，便可在用户界面使用数据库中的信息进行登录，极大的保证了系统的安全性。用户可以通过数据库匹配方法来对ID卡进行登记、删除等操作。(In order to ensure the security of the system, the login function is added to the access control system. By inputting administrator information from the back-end database, including user name and password, the information in the database can be logged on in the user interface, which greatly guarantees the security of the system. Users can register and delete ID cards through database matching method.)
- 2020-06-23 13:00:06下载
- 积分：1
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GA_RBF
说明： 使用遗传算法对RBF神经网络进行优化，并进行测试(Genetic algorithm is used to optimize RBF neural network and test)
- 2020-10-22 17:33:13下载
- 积分：1
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serial to parallel
直接序列扩频通信中采用QPSK调制时，须将产生的串行数据首先串并变换成两路，本程序就是实现这种串并变换！(Direct sequence spread spectrum communications using QPSK modulation, it is necessary to have a string of serial data and converted into the first two, the process is to realize such a string, and transform!)
- 2009-07-01 11:48:14下载
- 积分：1
