FFT_practise_and_analysis

用过完备字典的压缩感知进行频率估计，画出频谱图(Compressed sensing frequen cy estimation)

说明：  0_Linear：线性回归练习 1_LogistRegression：逻辑回归练习 2_boston：波士顿房价预测 3_regularization：正则化 5_stock：股票价格预测 6_CTR：点击率预测 7_all_model：回归与分类模型 8_muticlass：多分类练习 9_regression_implement：不同回归算法tf实现(0_Linear. 1_LogistRegression. 2_boston. 3_regularization. 5_stock. 6_CTR. 7_all_model. 8_muticlass. 9_regression_implement.)

说明：  小波变换对脑电信号处理有用，采用db4小波对脑电信号7层分解(Wavelet is useful for EEG signal processing)

LDPC码编译码源程序，可生成任意非规则二进制校验矩阵，并可进行LLR BP译码(LDPC codec source code can be generated non-arbitrary rules binary check matrix, LLR BP decoding can be carried out)

一个MATLAB的课件提纲，对初学者应该有一点帮助(A MATLAB courseware outline, there should be some help for beginners)

说明：  该程序的主要功能是用于产生LFＭ线性调频信号(The program' s main function is used to generate LFM chirp signal)

遗传算法优化 B P 神经网络非线性函数拟合 根据遗传算法和 B P 神经网络理论(Genetic algorithm optimization BP neural network - non-linear function fitting B P based on genetic algorithms and neural network theory)

Fast_Infogram MATLAMB程序，包含时域谱负熵、频域谱负熵和平均谱负熵(Fast_Infogram MATLAMB program, including time-domain spectral negativity, frequency-domain spectral negativity and average spectral negativity)

说明：  求解大规模无约束最小化问题，使用信赖域算法，其中信赖域子问题使用截断共轭梯度法(The trust region algorithm is used to solve the large-scale unconstrained minimization problem, in which the truncated conjugate gradient method is used for the trust region subproblem)

pdf file and matlab code for space time block coding for wireless communications