Research on MEMS IMU Aided BeiDou Receiver Carrier Loop Technology

Abstract

In dynamic scenarios, the loop bandwidth of BeiDou receiver must be sufficiently wide and the integration time should be short to ensure stable tracking. It will introduce too much noise to the tracking loop with the increase of bandwidth and the reduction of integration time, resulting in the loss of lock of BeiDou receiver carrier tracking loop in high dynamic scenarios. Therefore, high dynamic position is hard to be achieved. In this paper, steady tracking performance with auxiliary has been performed under different ${\text{C}}/{\text{N}}_{0}$ (carrier to noise ratio) and dynamic scenarios, and we propose the range of accuracy of the PLL effectively aided by MEMS IMU under different orders, and then analyze the auxiliary optimal bandwidth under different orders. Simulation results show the improvement of bandwidth with auxiliary under different grades of MEMS IMU and different orders of PLL.