Research on the NLoS Mitigation Algorithm for Integrated Navigation of BeiDou and TD-LTE

Abstract

The Integrated Navigation of BeiDou and TD-LTE is a positioning technology which would be broad prospects in the application of the Intelligent Transportation Systems (ITS) and public security, etc. However, it also faces many challenges. In the positioning system based on the cellular network, the error caused by Non Line of Sight (NLoS) propagation can average between 500 and 700 m [1]. NLoS propagation will bias the measurements of location parameters including Time of Arrival (TOA), Angle of Arrival (AOA) even if there is no multi-path and multi-access interference and will seriously impacts on the calculation of location. This paper mainly studies on the NLoS mitigation algorithm for integrated navigation of BeiDou and TD-LTE, analyses the affection on 700 MHz and 2.6 GHz of TD-LTE caused by NLoS propagation. According to the problems, an NLoS mitigation algorithm based on dual-frequency detection is proposed and some related simulations are accomplished. The result shows that the algorithm doing better on mitigating NLoS affection than the traditional algorithm.