modem

说明：  bp神经网络按照误差逆向传播算法训练的多前馈神经网络(BP neural network multi feedforward neural network trained by error back propagation algorithm)

gabor变换 用于时频分析 可以得到时频分析谱(gabor transform for time-frequency analysis can be time-frequency analysis spectral)

This code implements the concept of content based image retrieval concept using the technique described in The Application of DWT and SVD in Image Retrieval.

本文根据移动通信衰落信道的工作机理, 基于加性高斯白噪声信道( AWGNChannel) 、 落信道( RayleighFading Channel) 、莱斯衰落 icianFadingChannel) 的仿真模型, 并利用M 行了衰落信道的误比特率性能的仿真分析。(Based the working mechanism of the mobile communications fading channel, Based on the additive white Gaussian noise channel (AWGNChannel), The down channel (RayleighFading Channel), Rice fading icianFadingChannel) simulation model, and the use of M Line simulation analysis of the the fading channel bit error rate performance.)

基于杂草算法Kohonen网络入侵检测 (Weeds algorithm based on Kohonen network intrusion detection)

GPS精密星历卫星轨道插值运算（采用切比雪夫拟合）matlab程序。直接运行chebshev2.mat文件即可，结果显示在doucument2.mat文件中(Precise GPS satellite orbit ephemeris interpolation operation (using Chebyshev fitting) matlab program. Can run directly chebshev2.mat file, the results are displayed in the doucument2.mat file)

说明：  MATLAB信号检测仿真例子 参数都已知的GLRT检测(MATLAB signal detection simulation example)

Matlab仿真实现LDPC算法。BPSK调制，适用于AWGN信道(Matlab simulation implements the LDPC algorithm. BPSK modulation, suitable for the AWGN channel)

重磁异常体（球、圆柱、板状等）正演模拟程序(Gravity and magnetic anomalies body (sphere, cylinder, plate, etc.) forward modeling program)

stenography a dip technique good one