中文说明：
通过虚拟阵元进行DOA估计，基于分段非线性权重值的Pso算法，基于SVPWM的三电平逆变的matlab仿真，这个有中文注释，看得明白，计算多重分形非趋势波动分析，现代信号处理中谱估计在matlab中的使用。
English Description：
DOA estimation by virtual array element, PSO algorithm based on piecewise nonlinear weight value, matlab simulation of three-level inverter based on SVPWM, which has Chinese notes, can be seen clearly, calculation of multifractal non trend fluctuation analysis, the use of spectrum estimation in MATLAB in modern signal processing.