The Star Selecting and Distributing Algorithm of Beidou/Ground Pseudo-Satellite Integrated System

Abstract

The number of the traceable satellites and their GDOP(geometric distribution of precision) has significant influence on precision, reliability and availability of Beidou navigation system. Therefore, it is concluded that the construction of the ground pseudo-satellite systems can be solved the bottleneck of the vulnerable navigation signal interfered in the complex electromagnetic environment. However, there are two problems of Beidou/pseudo-satellite system to be solved, one is the increased amount of calculation and satellite positioning fault due to the increased amount of satellites, the other is how to effectively deploy ground pseudo-satellite position. So, the paper provide an effect algorithm. It is directly selected the most similar satellite station location from the optimal GDOP in order to reduce the amount of location solution computation owe to the increased number of Pseudo-satellite, the positioning accuracy can be ensured by optimal GDOP shape, and then the balance between positioning accuracy and rapid positioning is found, and the positioning accuracy can be ensured based on the rapidity. Secondly, to avoid the GDOP time-consuming traversal, the maneuvering satellite station distribution algorithm is deduced through the matrix decomposition and the matrix eigenvalue, and the simulation result is shown that the algorithm without calculating inverse matrix is simple and stable, which can be effectively guided the pseudo-satellites distributing in the specially appointed area. Thus the effectiveness of Beidou satellite navigation system can be effectively enhanced. For all, this result would be great practical significance for promoting the application of the development of the Beidou satellite navigation system.