Measurement of GPS Road Roughness under the Multiplicative Noise
LI Wei-ya · Science Technology and Engineering · 2014
The GPS signal transmission channel exists a large number of nonlinear and non- stationary multiplicative noise,it interferences on GPS signals. The traditional method of GPS signals to eliminate multiplicative noise denoising effect can't meet the requirements,which redused the coordinate system of precision and the accuracy of measurement of road roughness. A kind of road roughness measurement method was proposed based on the the multiplicative noise optimization. The receive GPS signals were used in the discrete wavelet transform method to eliminate the multiplicative noise to get accurate data. GPS road roughness measurement model is established 3d space coordinate system by using. Experiments show that this method can eliminate the multiplicative noise of GPS signals,and accurate measurement of road roughness.