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two_ray_model
Modelo de dos rayos de Andrea Goldsmith (figura 2.5, según expresión
2.12)
f = 0.9 frecuencia en GHz
landa = 0.3/f en m
R = -1 coeficiente de reflexión en tierra
ht = 10 altura del transmisor en m
hr = 2 altura del receptor en m
Gt = 1
Gr = 1
Pt = 1
d=10:.1:100000
phase_diff = 4*pi*ht*hr./(landa*d) aproximación
Pr = Pt*((landa/(4*pi))^2)*((abs((sqrt(Gt)./d) + (R*sqrt(Gr).*(exp(-sqrt(-1)*phase_diff)))./d)).^2)
Pr = Pt*((landa/(4*pi))^2)*(1./d).*((abs((sqrt(Gt)) + (R*sqrt(Gr).*(exp(-sqrt(-1)*phase_diff))))).^2)
figure(1), clf,
plot((d),10*log10(Pr/max(abs(Pr))))
grid
xlabel( log_1_0(d) )
ylabel( Potencia recibida (dBm) )
- 2010-02-08 06:31:54下载
- 积分:1
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decomposition-and-reconstruction
说明: 基于lena图像的3层小波的图像分解与重构(Lena image-based 3-layer wavelet decomposition and reconstruction of images)
- 2011-04-18 15:28:59下载
- 积分:1
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face_detection_by_template_tutorial
基于模板匹配的人脸检测教程,matlab代码(tutorial of face detection by template)
- 2013-04-16 19:46:22下载
- 积分:1
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Matlabfreescale
基于MATLAB的无标度网络仿真,对于学习复杂网络很很好的启迪(MATLAB-based simulation of scale-free network, complex network is very good for learning inspired)
- 2011-01-11 15:52:44下载
- 积分:1
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IPToolbox
matlab image processing toolbox
- 2014-09-19 02:25:18下载
- 积分:1
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65850aa6cee2df523eb85276f49179b1
Calendar Application” Using C/C++
- 2015-03-02 03:28:55下载
- 积分:1
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minenframe
此函数实现含噪语音的信噪比的计算,以最小帧算法为基础。(Implementation of this function of the signal to noise ratio of noisy speech has calculated that, with the smallest frame-based algorithm.)
- 2009-03-28 11:59:56下载
- 积分:1
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kmeans
说明: 基于kmeans,用于计算客户价值等(Based on kmeans, used to calculate customer value, etc.)
- 2008-09-08 11:40:12下载
- 积分:1
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ga-bp
用遗传算法来改善BP神经网络模型,可以很好的用于最优化、预测等问题的求解(Using genetic algorithms to improve the BP neural network model, can be very good for optimization, forecasting and other problem solving)
- 2011-07-24 13:07:09下载
- 积分:1
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svmtest
简单地支持向量机的测试程序,希望对你们有用,它是测试两个线性分类的。(A simple test program to support vector machine, and I hope useful to you.)
- 2014-08-26 18:52:42下载
- 积分:1