中文说明： ldpc码的编解码实现，详细画出了时域和频域的相关图，关于神经网络控制，旋转机械二维全息谱计算的实用例程，自己编的5种调制信号，处理信号的时频分析。
English Description：
Encoding and decoding of LDPC codes implementation details painted in time domain and frequency domain correlation diagrams, on neural network control, calculation of two-dimensional holospectrum in rotating machinery and practical routines made up of 5 kinds of modulation signals, time-frequency analysis for signal processing.