FPGA的D-LMS自适应滤波器设计

Adaptive Filter Design of D-LMS Based on FPGA

针对无线探测节点在震源定位过程中,节点不能快速且有效地将采集的数据实时去噪的问题,设计了一种基于FPGA的D-LMS自适应滤波器,首先,通过MATLAB确定时延长度和步长因子等参数;其次,通过FPGA设计数据锁存模块、滤波器模块、误差计算模块和权值更新模块;最后,通过MATLAB和VIVADO联合仿真验证。仿真结果表明,该设计极大提高了输入信号的信噪比,提升了定位速度,有较高的工程应用价值。

In the process of source location,the wireless detection node cannot quickly and effectively de-noising the collected data in real time.An adaptive D-LMS filter based on FPGA is designed.Firstly,parameters such as delay length and step factor are determined by MATLAB.Secondly,data lock module,filter module,error calculation module and weight update module are designed by FPGA.Finally,through MATLAB and VIVADO joint simulation,the results show that the design greatly improves the signal-to-noise ratio of the input signal,improves the positioning speed,and has high engineering application value.