对信号进行谱估计方法的研究。故要求同学生成不同频率段的信号，将其叠加，并叠加噪声，研究不同谱估计算法对其进行检测上的优缺点-Study the signal spectral estimation methods. It requires students to generate signals of different frequency band, which was superimposed, and superimposed noise, different studies spectr