A New Multipart Estimation Method for GPS Signals

摘要：

An integration and frequency analysis based method was put forwarded suitable for estimating close-in GPS multipath parameters of code and carrier in low sNR (signal to noise ratio) environment. With the proposed method, the robustness of the algorithm under various SNR was obtained. The paper built the multipath model and noise model, and proposed the SNR enhancement method based on integration. Later the relationship between the sampling rate and the multipath resolution was deduced. The relationship between integration time and SNR enhancement was also deduced. Simulations validated the correctness of theoretical derivations and the low SNR multipath estimation method for both carrier and code parameters based on frequency analysis and integration. It is shown that the mew method can distinguish multipath of 0.05C/A chips delay and estimate parameters of code and carrier in -20dB SNR in case of 20.46MHz sampling rate with L=30.

关键词： GPS multipath delay estimation carrier SNR

作者: Yanxin Yao Dongkai Yang Qishan Zhang

作者单位: School of Electronic and Information Engineering,Beihang University,China

会议类型: 国际会议

会议名称: 2009 9th International Conference on Electronic Measurement & Instruments(第九届电子测量与仪器国际会议 ICEMI2009)

会议地点: 北京

会议语种:英文

页码: 2212-2215

在线出版日期: 2009-08-16（万方平台首次上网日期，不代表论文的发表时间）