In this paper, the general normalized least mean square (NLMS) adaptive algorithm was modified to ensure the linear phase of the FIR filter obtained in this way without the gradient noise amplifying.

• 它用经过改进的归一化最小均方(NLMS)算法来保证所得结果具有线性相位，且克服了梯度噪声放大问题，同时也不必选择步长。