基于db10小波基函数的GPS信号去噪效果分析  

Analysis on De-Noising Effect of GPS Signal based on db10 Wavelet Function

作　　者：李海文[1] 周海峰[1] 蒋霖[1] 

机构地区：[1]广西建设职业技术学院,南宁市530003

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)

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.

关 键 词：小波 GPS 去噪 

分 类 号：P228.4[天文地球—大地测量学与测量工程]