Wavelet Denoising Technique for Improvement of the Low Cost MEMS-GPS Integrated System

Abstract

In this paper, wavelet signal processing technique is applied to improving navigation signals. Low cost MEMS signals can be distorted with conventional pre-filtering method such as low-pass filtering which causes unwanted smoothing on real signals. However, wavelet thresholding method does not distort the rapidly-changing signal but reduces signal noise. This paper has applied thresholding method to low cost MEMS/GPS integrated navigation system and verified the improvement of the navigation performance by the experiment.