Design and Simulation of a Direct Digitization Scheme for GNSS Receiver Front-ends
In the near future, RF front-ends of GNSS receivers may become very complicated when multi-frequency signals are available from at least four global navigation systems. Based on the direct RF sampling technique, fully digitized receiver front-ends may solve the problem. In this paper, a direct digitization RF front-end scheme is presented. The entire spectrum of GNSS signal is directly digitized through RF sampling at a very fast sampling rate. Then a decimation and filtering network is designed to lower the sampling rate. It also realizes the digital down-conversion of the signal of interest and the separation of narrow band signals from different navigation systems. The scheme can be flexibly implemented in software. Its effectiveness is proved through the experiment using simulated and true signals.
direct RF sampling sampling rate selection multi-rate signal processing GNSS receiver RF front-end
Yu Yuan Chang Qing Chen Yuan
School of Electronic and Information Engineering, Beihang University (BUAA), Beijing 100191 China
国际会议
2010 International Conference on Future Information Technology(2010年未来信息技术国际会议 ICFIT 2010)
长沙
英文
47-51
2010-12-14（万方平台首次上网日期，不代表论文的发表时间）