The Design And Realization Of Satellite Navigation Receiver Baseband Hardware System

Satellite navigation baseband processing system is a direction of the development ofthe current high performance satellite navigation receiver, navigation receiver, which isdifferent from traditional more embedded in the baseband processing system existing in avariety of satellites, communications, automotive and aircraft systems provide navigation.And achieve this main part of the core technology is the high performance, miniaturization,low power consumption of the construction of the baseband processing system. This papermainly studied how to design and implement a miniaturization, stable and reliable, lowpower consumption of satellite navigation baseband processing system hardware platform,the project has good application background and practical value.This paper first introduces the concept and theory of satellite navigation system,detailed elaborated the basic principle of satellite navigation receiver, and analyzed thedeficiency of the whole aircraft navigation receiver architecture and compatibility of thesimilarities and differences in architecture. Summarizes the study out a suitable for generalhardware architecture of the baseband processing of satellite navigation system, analyzedthe advantages and features of architecture, and highlights its flexible architecture, ease ofuse and the characteristics of strong extensibility.Then, based on the key technology in the architecture of through the signal integritytheory research and simulation of signal and related model, summarizes the need to payattention to in the board design is the key link. For the determination of the parameters ofthe system module by contacting related theory, by means of mathematical simulation,determine the A/D sampling digits. According to the bandpass sampling theorem, determinethe sampling clock., according to the characteristics of the compatibility of the card,emphasize, summarizes from input to output interface design, the main points of the designof protection and the corresponding interface extension scheme, as well as customizeddesign key points of multi-functional radio frequency (RF) scheme, a detailed analysis of the RF input transmission model, improve the quality of the signal and enriched the wholefunction.,Finally, according to a navigation receiver requirements of the project, and has designthe standardized interface card at this stage to support military navigation signals of thesmallest navigation module, and through the test and application example, verify the boardand the function of the system. Detailed design, and test results. The above results havebeen verified in practical application, the whole system and the design for the board hasobtained the good effect.