伪卫星的远近效应研究

Research on the Near-far Effect of Pseudolites

介绍了全球卫星导航系统及其伪卫星在近些年的部署情况和应用，对伪卫星的远近效应进行了深入的研究。用频分多址、码分多址、时分多址结合伪卫星的特点来解决其远近效应问题。得出实际应用中，在多颗伪卫星的复杂应用场合，最好的解决方案应该是时域、频域和码域的技术组合。

Introduces the current development of Global Navigation Satellite System and the important function on improving and enhancing the positioning performance of Global Navigation Satellite,then carried on the thorough research of the near-far effect of pseudolites.Solve the problem of the near-far effect through the technology of the FDMA,CDMA,TDMA combined with the characteristic of pseudolites.In practical applications of mutiple pseudolites,the combination of time and frequency and code domain technology is the best solution.