针对当前广泛应用的自适应滤波器,提出了一种改进的变步长NLMS自适应算法,在不增加计算复杂度的条件下获得了更好的收敛速度。在硬件实现过程中,利用FPGA并行处理的特点,采用自上而下的设计方法和流水线设计技术,获得了较好的滤波效果和较快的处理速度,完全满足自适应信号处理领域中实时性的要求。 Aiming at the widely used adaptive filters, an improved variable step size NLMS adaptive algorithm is proposed, which can obtain better convergence speed without increasing the computational complexity. In the process of hardware implementation, the use of FPGA parallel processing characteristics, using top-down design and pipeline design techniques, get better filtering and faster processing speed, fully meet the real-time adaptive signal processing Request.