QPSKwithmatlabcode

Flexible construction of girth-six QC-LDPC Codes(The program constructs girth-six QC-LDPC codes given row-weight,k, column-weight,j, and sub-matrix size,m. The obtained parity-check matrix is stored in H. The construction has flexibility in that j,k and m can be varied.The program achieves girth-six by applying the row-column constraint. There are m rows in j submatrices. No two rows should share the same column more than once. This constraint is applied to avoid 4-cycles. The construction has flexibility in that j,k and m can be varied.)

LS-SVM实用的matlab工具箱，精度还可以，欢迎下载(the MATLAB tool box of LS-SVM )

利用matlab实现的HEFT算法，其中包含计算rank值(HEFT algorithm)

hysys and matlab link

说明：  非线性方程组的牛顿迭代方法与非线性方程解法类似，也是求解非线性方程组的常用方法。(Nonlinear equations of the Newton iteration method and nonlinear equations similar to solving nonlinear equations is a common method.)

Dynamic Matrix Control is the first MPC algorithm developed in early 1980s. It is probably also the most widely used MPC algorithm in industry due to the fact that its internal model, the step response model is easy to obtain in an industrial process. The package provides a dmc function to perform dynamic matrix control and to show the principal of DMC. An example file is included to show how the dmc function can be used to solve a control problem. It only uses basic MATLAB commands. No any other toolboxe is required.

说明：  完整的ofdm仿真程序，在matlab上实现(Complete OFDM simulation program in matlab to achieve)

模拟FM信号的解调子程序，包括下变频、A/D采样、正交解调，最后输出基带信号。(Subroutine analog FM demodulation signal, comprising down-conversion, A/D sampling, orthogonal demodulation, and finally outputs a baseband signal.)

利用matlab软件，采用时程分析法，对结构的地震响应进行分析(Using matlab software, time history analysis method to analyze the seismic response of structures)

matlab的gscale函数功能是将强度图像等映射到别的值范围(Function of matlab gscale intensity image is mapped to a different range of values, etc.)