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2008_2
(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。并请回答：证明自己用计算机产生的经典谱是正确的可能方法。
((1) in certain wireless channel, the Doppler frequency shift will be caused by wireless channel output signal aliasing. Please describe the resulting aliasing of a variety of reasons (2) wireless channel Doppler spectrum there is a classical spectrum (classic spectrum), please explain such a spectral shape of the mechanism (3) Please use Simulink tools for writing code ( S-Function mode), resulting in a single Path Rayleigh channel, the Doppler spectrum for the classical spectrum, including mobile rate of 120km/h. And please answer: prove that they used computer-generated classical spectrum is correct possible ways.)
- 2020-12-30 11:39:00下载
- 积分：1
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DVB_T
OFDM具有很强的抗多径和抗频率选择性衰落的能力，并且可以传输高速数据，这里以DVB_T（2k模式）为例分析其加信道厚的信号频谱及信道对OFDM中频信号的影响。(The purpose of this programme is to provide Matlab code to simulate the basic processing involved in the generation and reception of an OFDM signal in a physical channel and to provide a description of each of the steps involved. For this purpose,we shall use, as an example, one of the proposed OFDM signals of the Digital
Video Broadcasting (DVB) standard for the European terrestrial digital television (DTV) service.)
- 2009-05-24 20:24:11下载
- 积分：1
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Permanent-magnet-synchronous-motor
Mysmo.mdl
永磁同步电机的主程序，可以实现有速度传感器启动运行，和无速度传感器运行。
SMOmodel.m
改进的滑模观测器模型，实现永磁同步电机反电动势的估算。
PFCDCM0hm5
用的是0.5hm的电感，实现220V交流电变换成400V的直流电，电流断续。
由于是仿真，如果要硬件实现的话，除了需要电压采样外，还需要一个输入电压过零检测
PFCCM320percent98k50
用的是5hm的电感，实现220V交流电变换成320V的直流电，电流连续。功率因数可以达到0.98，用的开关频率为50K
PFCCM400percent97k50.mdl
用的是5hm的电感，实现220V交流电变换成400V的直流电，电流连续。功率因数可以达到0.97，用的开关频率为50K
(Permanent magnet synchronous motor Mysmo.mdl main program, you can achieve the speed sensor up and running, and speed sensors run. SMOmodel.m improved sliding mode observer model permanent magnet synchronous motor back-EMF estimates. PFCDCM0hm5 with is 0.5hm inductor to achieve 220V AC transform into a 400V DC current is interrupted. As the simulation, hardware implementation, then, in addition to the voltage sampling an input voltage over zero detection PFCCM320percent98k50 the is 5hm inductance to achieve transformation 220V AC 320V DC continuous current. The power factor can reach 0.98, the switching frequency for 50K PFCCM400percent97k50.mdl with is 5hm inductance 220V AC transform 400V DC continuous current. The power factor can reach 0.97, with the switching frequency is 50K)
- 2012-07-26 18:03:33下载
- 积分：1
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source_matlab
mô phỏ ng watermaking
- 2013-11-27 00:54:10下载
- 积分：1
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wc5
Bilinear Series Parameter Estimation
- 2009-11-04 03:52:52下载
- 积分：1
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dscdma_ann
Modelisation of DS-CDMA transmission system using Artificial Neural Network
- 2011-05-21 20:37:59下载
- 积分：1
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RF-Lab-1
practicals that used for microwave transmission and check the power
- 2014-09-07 18:05:49下载
- 积分：1
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ARMA_adaptive_gm
自适应，arma ，gm ，都是根据论文写得，结果和论文一样，仅供参考。(Adaptive, arma, gm, are based on written papers, and papers as a result, are for reference only.)
- 2013-12-23 22:19:06下载
- 积分：1
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鸢尾花分类
使用四种方法进行鸢尾花分类：最小距离分类器，K 近邻法，感知器，Fisher 准则。(Four methods are used to classify iris: minimum distance classifier, K-nearest neighbor method, perceptron and Fisher criterion.)
- 2020-09-17 18:37:56下载
- 积分：1
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SVM-KM
一个支持向量机的matlab工具箱，具有分类、拟合等功能，希望大家下载研学阿！(A support vector machine matlab toolbox, with a classification, fitting functions, I hope you download the research study Ah!)
- 2011-08-15 15:48:20下载
- 积分：1
