| The global satellite position system(such as GPS,GLONASS)has been extremely mature by the navigation technology, but sometimes satellite navigation is still getting a limit in some aspects and some special districts, so it could not get a good navigation accuracy. Therefore in recent years, the pseudo-satellite position technique provides a new research direction for improving satellite position system.In the thesis, it is combined with GPS pseudolite's widely application in whole field and huge foreground in future, do a research for the theory of pseudolite technique. Pseudolite greater anti-jamming ability because they are much closer to user receivers than navigation satellite are. Therefore, whist the satellite navigation technology is improved by all possible means, it is proposed that using pseudolite differential technique to improving position system. According to the principle of DGPS, separately discusses the problem in three aspects which is influenced position accuracy, that is time synchronization, near-far effect, geometric dilution of precision (DOP). Analyzed its effects in navigation system and several needed questions, then drawing up the solutions. The simulation results show that the solution is validity and feasibility, as well as using pseudolite to improving satellite position system, could enhancing usability, reliability, stability and measure accuracy of whole system. |
PDF Full Text Request