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Compute symmetric trapezoid region based on its sides and height length.

BLOCK CODE MODULATION SIM

使用高阶累积量对MPSK信号进行调制识别，通过matlab代码，代码里有很完整的注释和解释。( Using high-order cumulants of MPSK signal modulation recognition, By matlab code, Code, there are very complete notes and explanation.)

数值分析中几个基础的matlab程序，包括选主元的高斯消去，矩阵的LU分解以及Jacobi迭代(Numerical analysis of several matlab-based procedures, including the election of the principal Gaussian elimination, LU decomposition of matrices and Jacobi iteration)

关于AR模型的burg、yulear功率谱估计算法，与系统自带的pburg相比，精确度更高(ar burg yulear)

说明：  1、ofdm信道仿真 2、基于梳妆导频的OFDM信道估计 (1, ofdm channel simulation 2, based on the dressing pilot channel estimation of OFDM)

已修改调试，可以运行.有图像结果，易以观察结果(it can be used in matlab, because it have amend.)

pcm编码设计和最佳量化器设计仿真程序。建议在matlab 6.1 或以上的版本，可直接运行。(pcm coding design and the best quantitative design simulation program. Recommendations in Matlab 6.1 or more versions can run.)

解决储罐内的二维扩散对流问题，可用在多孔介质中的运算，能够很好的解决问题(Solve the problem of one dimensional convection diffusion)

将一个512×512的lena.bmp图像进行DCT变换，对得到的DCT系数按8×8块进行分层（分三层），重组填充得到新的系数矩阵，结果发现原图像的能量集中在了新图像的左上角低频部分。(The lena.bmp an image of 512 × 512 is subjected to DCT transform, the DCT coefficients obtained by layering 8 × 8 block (of three), to obtain a new recombinant filling coefficient matrix, the energy of the original image is found concentrated in upper left corner of the low-frequency part of the new image.)