分数延迟FIR滤波器的实现，分别使用了最小二乘法，拉格朗日插值法以及优化加权最小二乘法。-Fractional delay FIR filter implementation, using the least square method, the Lagrange interpolation method and optimization of weighted least squares.

相控阵天线的方向图（切比雪夫加权），利用最小二乘法进行拟合多元非线性方程，包含CV、CA、Single、当前、恒转弯速率、转弯模型。- Phased array antenna pattern (Chebyshev weights), Multivariate least squares fitting method of nonlinear equations, It contains CV, CA, Single, current, constant turn rate, turning m