中文说明：现代信号处理中谱估计在matlab中的使用，单径或多径瑞利衰落信道仿真，pwm整流器的建模仿真，包括回归分析和概率统计，保证准确无误，是学习通信的好帮手，能量谱分析计算。
English Description：
In modern signal processing spectral estimation in Matlab using, single path or multipath Rayleigh fading channel simulation, the modeling and Simulation of PWM rectifier, including regression analysis and the probability statistics, to ensure the accuracy, is a good helper to learn communication, energy spectrum analysis and calculation.