根据ａｂｉｎｉｔ输出的势文件，计算体系的平均势-According abinit potential output file, calculate the average potential of the system

基于穷搜算法的向量扰动预编码脚本，用于测试该算法的误比特率性能。系统模型为4×4的MIMO系统。调制方式为4QAM。参数可以更改。-vector perturbation(VP) precoding algorithm based on exhaustive search (ML). 4*4 MIMO system with 4QAM.

增量奇异值分解算法，来至MIT大学的wingate教授，含3个源码.-Given the thin SVD of a matrix (X=USV ), update it in a number of interesting ways, while preserving the rank of the result. svd_update.m- update the SVD to be [X+ A *B]=Up*Sp*Vp (a general matrix update). add

Each code generates GIF files of group/phase velocity animations where vp>vg, vp=vg, and vp<vg. In the animation, two markers are used to show the movements of the wavepacket and envelope.