Resonance_test2

光纤光栅反射谱曲线，用以描述光栅反射谱特性(FBG reflection spectrum curve, which describes the grating reflection spectrum)

说明：  主要介绍QPSK的matlab编程，初步学习matlab语言在通信中的运用(the introduction of QPSK)

绕射模型下的场强预测 对于复杂环境下的电磁场的预测还是较为准确的(Field strength prediction under diffraction model)

采用累计贡献率的方法，BP神经网络的整个训练过程,有信道编码，调制，信道估计等。( The method of cumulative contribution rate The entire training process BP neural network, Channel coding, modulation, channel estimation.)

说明：  x=2*sin(4*pi*t)+5*cos(8*pi*t) 对其进行快速傅立叶变换 加入高斯噪声 再进行频谱分析(x = 2* sin (4* pi* t) 5* cos (8* pi* t) makes its rapid Fourier transform to re-Gaussian noise spectral analysis)

对识别的指纹进行二值化处理，可以让指纹的纹路更清晰。(On binary fingerprint recognition processing, fingerprint patterns can be more clear.)

说明：  用于各种潮流计算和最有潮流计算的matpower 中文手册(For various flow calculation and the most current computing matpower Chinese manual)

曲线标记，设计与所画曲线中标记为圆形星形，或其他形状，方便读者识别(Curve marked)

应用交替方向乘子法来求解L1正则化问题、BP问题、LASSO问题的一种算法，(Application alternating direction multiplier method to solve L1 regularization problem, BP issue LASSO problem an algorithm)

仿真2×1瑞利信道，分别考虑三种接收分集技术：最大比合并、等增益合并、选择性合并，并给出误码率比较。(In a one transmitting antenna and two receiving antenna collocate,calculate the bits error rates of the maximum ratio combining,equal gain combining ,selective combining and SISO system)