一维推力滑动轴承习题解答20180602(1)

工具箱，控制理论发展的最新成果，很好的东西，分分享(Toolbox, the latest development of control theory, very good, sub-share)

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) )

说明：  the code for numerical computation in matlab

基于维特比译码算法的BPSK解调方式，survivor_state是一个矩阵，它显示了通过网格的最优路径，这个矩阵通过一个单独的函数metric(x,y)给出，这个算法既能用于硬判决译码也能用于软判决译码。 (BPSK demodulation method based on viterbi decoding algorithm, survivor_state is a matrix, the optimal path of it shows through the grid, the metric matrix through a separate function (x, y), the algorithm can not only used for decoding hard decision can also be used to the soft decision decoding. )

ici cancellation on ofdm its important to see how cancel intercell interference on ofdm

给出算例的蜜蜂算法，可以用于智能优化，有实例，可供参考修改应用(Colony algorithm)

《信号与系统——MATLAB综合实验》配套资料谷源涛、应启珩、郑君里著，《信号与系统——MATLAB综合实验》，北京：高等教育出版社，2008年1月(" Signals and Systems- MATLAB comprehensive experimental" support information Gu Yuan Tao, should Kai Heng, Zheng Junli with, " Signals and Systems- MATLAB comprehensive experiment" , Beijing: Higher Education Press, January 2008)

基于MATLAB环境下的数字信号的调制（四种调制方式的具体实现方法）(Based on digital signal modulation MATLAB environment (the concrete realization of the four modulation method))

BER for BPSK using Rayleigh fading channel

SOR迭代法与高斯赛德尔迭代在洋流分析中的应用(Two iterative method in the analysis of the application of the ocean currents )