Aiming at improving digitized level of satellite navigation receiver architecture

a down conversion method based on digital signal decimation is proposed.By using separating and accumulating method

direct down-conversion of a digitized carrier signal with relative high frequency is realized. This method has virtues of simpler structure

high speed and less calculation

so it can guide the low power consumption and low-cost integrated chip design.Also it can well preserve navigation message and Doppler information.Analysis and simulation results show that it has no effect on positioning precision of receiver.