Design of multi-stage interpolation digital upconverter in LEO satellite DS-CDMA system
Li Zu, Yi Zheng · Application of Electronic Technique · 2010
In this paper,interpolation method of digital upconverter in LEO DS-CDMA satellite systems was researched,and a multi-stage interpolation structure including shaping filter,half-band filter and CIC filter was introduced for sample rate conversation. The shaping filter based on polyphase filter and the improved CIC filter were used,and with this method the performance of the digital upconverter and the usage of resource have been remarkably improved.