摘要
作者提取南宁实验GPS控制网观测数据中的原始载波信号,对提取的原始载波信号、单差观测值、双差观测值采用db10小波函数进行1～6层小波分解,研究不同分层条件下小波去噪的效果,并在评价去噪效果指标均方误差(RMSE)和信噪比(SNR)的基础上加入平滑度指标。通过综合考虑三种指标后得到的小波去除干扰后的数据,较好地提高了GPS信号的质量。
The author extracts the original carrier signal in GPS control network observation data of Nanning experiment, the extracted original carrier signal, single-difference observation values, double difference observations values are carried out 1 - 6 wavelet decomposition using dh10 wavelet functions, and the wavelet de-noising effect is studied under different hierarchical conditions. Based on the evaluation of root mean square error （RMSE） and signal to noise ratio （SNR index, the smoothness index is ively considering three indexes, the wavelet data is obtained after removal nal quality is greatly improved. also considered. Through comprehensof interference data, and the GPS signal quality is greatly improved.
出处
《勘察科学技术》
2012年第4期18-19,57,共3页
Site Investigation Science and Technology
基金
广西教育厅立项
广西财政资助项目(2009ⅡLX524)
关键词
小波
GPS
去噪
wavelet
GPS
de-noising
