A high-speed realization of the delayed dual sign LMS algorithm

Wang, Mingjiang; Zhao, Boya; Liu, Ming

doi:10.1587/elex.15.20180116

Cited by 3 publications

(1 citation statement)

References 13 publications

(22 reference statements)

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“…e size of the step factor μ affects the convergence speed and steady-state error of the LMS algorithm [29]. A small step size gives a smaller steady-state error and a slower convergence rate; with a large step size, the convergence rate is faster, but the steady-state error becomes larger too [30].…”

Section: Step Factor μmentioning

confidence: 99%

The On-Chip D-LMS Filter Design Method of Wireless Sensor Node Based on FPGA

Meng

et al. 2020

Shock and Vibration

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In the real-time position technology of underground shallow source, the signal denoising performance of wireless sensor nodes directly determines the location speed and accuracy of underground burst point. Because of the complexity and randomness of the underground medium and the fact that underground explosion is a nonstationary transient process, the problems of low convergence rate and poor steady-state performance of the filter exist when the existing LMS algorithm is used for signal denoising. In light of the above concerns, this paper comes up with a signal denoising algorithm and hardware implementation method based on D-LMS (delay-LMS). Firstly, according to the autocorrelation function characteristic of random signal, using the principle that the autocorrelation function time delay characteristic of narrowband signal such as explosion vibration signal is better than that of wideband random signal such as ground noise, the D-LMS filter algorithm is constructed by introducing the time delay parameter. Secondly, the selection method of key parameters in D-LMS hardware implementation is analyzed. Thirdly, the corresponding hardware circuit is designed by FPGA, and the simulation is carried out. Numerical simulation and experimental verification show that compared with the existing LMS improved algorithm, the D-LMS algorithm proposed in this paper has higher denoising stability and better denoising effect. Compared with the signal postprocessing method based on the host computer, the signal denoising speed of this method is significantly improved. This method will provide a powerful theoretical method to solve the problem of high-precision and fast source positioning and provide technical support for the development of high-speed and real-time source positioning instruments.

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Section: Step Factor μmentioning

confidence: 99%