基于地面基站的定位系统构建和方案

For the harsh internal signal environment and the large signal attenuation of satellite navigation with the difficulties of capturing and tracking signals stably inside large-scale, complex and multifunctional buildings, the multipath effect is serious, and the short multipath has a great influence on the positioning accuracy. Taken in this sense, it is difficult to locate directly with the navigation signals. This paper proposes a method of indoor positioning method based on a large area of ground base station (building group). According to the relationship between frequency and signal penetration performance and spatial attenuation, the frequency band of very high frequency is selected as the signal carrier, with the combination of the code pseudorange and the carrier pseudorange, to achieve the coverage and positioning performance. In this paper, a basic test system is built by using the proposed new positioning method. The signal acquisition, tracking and pseudorange differential are carried out through signal generation, transmission and wireless propagation, which preliminarily verifies the feasibility and the coverage ability of the proposed method.