一种伪卫星网络双天线双频定位算法

Dual-Frequency Location Method with Dual Antennas for Pseudo-Satellite Network

伪卫星技术无论在独立组网定位还是与卫星系统组合定位方面都有重要应用,基于频率与空间分集原理,提出了一种伪卫星双频定位算法,利用伪卫星上的双天线分别发射不同频率导航定位信号,定位接收机收到信号后建立双频载波相位观测方程,经过线性化处理,再分别运用加权最小二乘算法及LAMBDA算法得到模糊度整数解,并确定接收机的准确位置。仿真实验表明,与单频定位算法相比,该算法可以显著提高伪卫星系统的定位精度。

Pseudo-satellite technology has important applications in both independent networking positioning and satellite system combined positioning. Based on the principle of frequency and space diversity, a pseudo-satellite dual-frequency localization algorithm is proposed. The navigation signals of different frequencies are respectively transmitted by using the dual antennas on the pseudo satellites. The positioning receiver establishes a dual-frequency carrier phase observation equation after receiving the signal, and after linearization processing, the weighted least squares algorithm and the LAMBDA algorithm are respectively used to obtain the ambiguity integer solution, and the accurate position of the receiver is determined. Simulation experiments indicate that compared with the single frequency positioning algorithm, this proposed algorithm could significantly improve the positioning accuracy of the pseudolite system.