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wodewodewode
对于移动通信系统主要有两类衰落：大规模衰落和小规模衰落。大规模衰落表示由于大范围内移动而引起的平均信号能量的减少或路径损耗。而小规模衰落则表现为两种机制：信号的时延扩展和信道的时变特性。对于无线应用，信道的时变特性是由于发射机和接收机相对移动而造成传输路径的变化。这些传播条件的变化速率影响衰落率。如果存在大量反射路径而不存在视行信号分量，此时的小规模衰落称为瑞利衰落(Rayleigh fading)，接收信号的包络由瑞利概率分布函数统计描述。这种衰落也就是这次实验我准备研究的(system for mobile communications fading there are two main categories : large-scale and small-scale fading fading. In view of large-scale decline of large scale movement of the average energy of the signal path to reduce or loss. And the decline of small-scale, it was manifested as two mechanisms : signal delay expansion and channel time-varying characteristics. For wireless applications, channel time-varying characteristics as transmitter and receiver relative movement caused transmission path changes. These conditions spread of the rate changes affect the rate of decline. If there is a large number of pathways exist without depending on the signaling component, At that time, the decline of small-scale known as Rayleigh fading (Rayleigh fading). The received signal envelope from Rayleigh )
- 2007-06-20 23:44:47下载
- 积分：1
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nsa
人工免疫系统中的阴性选择算法，适合于初学者(Artificial immune system, negative selection algorithm, suitable for beginners)
- 2011-10-18 11:17:36下载
- 积分：1
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dianji
有关无刷电机的仿真程序，适合研究电机的人
(something about brushless dc motor)
- 2013-03-18 22:35:57下载
- 积分：1
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Matlab-simulink
Matlab simulink中S函数的写法,效果不错，可以仿真。(Written in Matlab simulink S function, good results can be simulated.)
- 2014-11-20 22:08:05下载
- 积分：1
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simulink-robot
两关节机械臂的独立PD控制，控制算法和机械臂模型均采用s_function函数编写。(Two independent joint manipulator PD control, control the preparation of the algorithm and manipulator model are used s_function function.)
- 2012-09-19 14:59:49下载
- 积分：1
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chengxu
聚集了光学相位测量的一些基本算法程序，包括相移量，相位算法等(We gathered some basic optical phase measurement algorithm program, including the amount of phase shift, phase algorithm)
- 2015-05-21 18:48:46下载
- 积分：1
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NeighborhoodCLASSIFIER
ALGORITHME DE CLASSIFFICATION
- 2010-10-02 18:13:07下载
- 积分：1
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doppler
多普勃效应因子与表观时间和表观长度,网上是要花钱买的，(Multi-factor and the apparent effect of普勃time and the apparent length, the Internet is to spend money, and)
- 2008-12-30 12:06:33下载
- 积分：1
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let
一个非常有用 的工具箱，可以用来计算常规的常微分动力系统的李指数和维数(A very useful toolbox that can be used to calculate the conventional system of ordinary differential power index and the dimension of Li)
- 2011-05-15 21:54:37下载
- 积分：1
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1206
数字通信离散频谱、相位等仿真，采用matlab平台(Discrete spectrum digital communication, phase and other simulation, using matlab platform)
- 2010-12-09 13:19:51下载
- 积分：1
