An Improved Delayed LMS Adaptive Filter and Its FPGA Implementation

Least Mean Square adaptive filter has been widely used such as geological exploration signal processing etc.because of its simple structure and small calculation amount.Aiming at the shortcomings of slow speed of the ordinary structure LMS adaptive filter,using the cutset timing reforming technology and pipeline relaxation,the structure of the LMS adaptive filter was optimized,an improved delayed structure of the LMS adaptive filter was acquired at first in the paper.Then an model of four-order ordinary and improved delayed LMS structure adaptive filter was built based on the DSP Builder tool and a series of simulation and comparative analysis was fulfilled with a variety of EDA tools respectively.The results show that the improved delayed structure LMS adaptive filter has a faster response speed than the ordinary structure,and the resources were used little less.