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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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xihao
说明: 运用MATLAB编程得到简单信号、简单信号运算、复杂信号的谱和功率谱图,复杂信号的谱存在线谱和连续谱,并分析其组成。(Be simple to use MATLAB programming signal, a simple signal computing, complex signal and power spectrum of the spectrum, the existence of complex signal spectrum line spectrum and continuous spectrum, and to analyze its composition.)
- 2009-07-30 18:17:04下载
- 积分:1
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qpsk_fading
说明: matlab的qpsk-fading的程序代码 是初学者的福音(The qpsk-fading matlab program code is the gospel for beginners)
- 2011-03-30 12:55:47下载
- 积分:1
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cylinder_test5_somenodes
格子Boltzmann方法,D2Q9模型,模拟多孔介质流动(Lattice Boltzmann method, D2Q9 model to simulate the flow in porous media)
- 2013-12-04 09:42:48下载
- 积分:1
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hw2_ar
对一随机信号进行AR模型的谐波估计,包括不同采样点数(Harmonics of a random signal AR model estimates, including different sampling points)
- 2014-01-15 20:04:51下载
- 积分:1
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mysegyImage
说明: 读取地震数据的道头字并画出剖面图, 没有读出所有的道头,只读取了几个角为重要的(read headers of seismic data and draw the profile)
- 2011-04-14 15:31:49下载
- 积分:1
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kkk
greypred.rar用于GDP预测,较为精准,误差小,程序简单,容易操作,实用。是很好的预测程序。(liner fit)
- 2012-04-07 11:11:03下载
- 积分:1
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1234444
说明: 时频分析工具箱,还有说明和源程序。很好的东西(Time-frequency analysis toolbox, as well as notes and source code)
- 2010-05-04 16:30:17下载
- 积分:1
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Nco_gen
NCO产生正余弦振荡波的matlab程序,很实用。(NCO generate cosine Sasser' s matlab program is very practical.)
- 2010-05-24 19:12:12下载
- 积分:1
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cpso
根据cpso算法给出的一个matlab代码,全,添加测试函数即可运行(According cpso given an algorithm matlab code, full, add test functions to run)
- 2014-01-21 10:28:01下载
- 积分:1