LDPC_QPSK

说明：  MATLAB技术论坛电子期刊第三期，matlabsky专业MATLAB技术交流平台！(MATLAB Technical Forum Electronic Journal III, matlabsky professional technical exchange platform for MATLAB!)

matlab的优化算法，经典算法，可用于数学建模(matlab optimization algorithm, the classical algorithm can be used for mathematical modeling)

用改进的周期图（Bartlett）法求1KHz方波信号加高斯白噪声的功率谱密度(Use the Bartlett to compute the power spectral density)

数据与计算机通信相关知识的详细介绍和研究。( Data and computer communications)

OFDM中的关于扰码器的个人设计的MATLAB的算法，比较经典的 ！(OFDM on the scrambler design of the personal MATLAB algorithm, more classic!)

模糊PID调节，并且通过与普通PID调节对比得出较好的效果(Fuzzy PID control, and by contrast with the ordinary PID regulator obtained better results)

这是TD算法的逆过程，首先将时间序列，划分为相邻点的短序列，当然此时的拟合误差为0，因为第一点和第二点的连线，原始点都落在线段上。将相邻两个线段连接起来，此时每条线段包含三个原始点，计算中间那个点的拟合误差。这样，所有这些三个点的线段中的中间点的拟合误差计算出来后，找出误差最小且误差小于阀值R的分段，作为第一条包含三个点的线段。 在上面的基础上，第一条分段同样的和相邻线段连接，然后计算每一条分段的拟合误差，再找出误差最小且小于阀值R的分段，作为第二个分段。依次方式循环，直到所有分段的拟合误差都小于阀值R，分段结束。 (This is the reverse process of TD algorithm, the first time series is divided into short sequences adjacent dots, of course fitting error is zero at this time, because the first and second points of connection, the original point fall line on. The two adjacent segments are connected, then each segment contains three original point, the intermediate fitting error calculated that point. Thus, after all these segments fitting error of three points in the intermediate point calculated to find the minimum error and the error is less than the threshold R segment, as the first line contains three points. Based on the above, the first segment and the adjacent line segment connecting the same, and then calculate a fitting error for each segment, and then find the smallest error and less than the threshold R segment, as the second segment . Followed by a cyclic manner until all segments fitting error is less than the threshold R, segment ends.)

说明：  光伏并网逆变器仿真，包括直接功率控制和svpwm控制（基于PI）(Photovoltaic grid-connected inverter simulation, including direct power control and SVPWM control (based on PI))

说明：  乘用车制动防抱死制动稳定性simulink仿真分析(vehicle anti brake steability simulink)

NSCT非下采样Contourlet变换，实现对图像的多尺度多方向分解，是一种真正的二维图像表示方法(NSCT nonsubsampled Contourlet transform, to achieve multi-scale multi-orientation image decomposition, is a true two-dimensional image representation)