Triple-Frequency Carrier Phase Positioning with Optimized Ambiguity Resolution in 5G New Radio Networks

Carrier phase positioning has been recently proposed as the potential high-accuracy positioning method in currently ongoing 3GPP 5G New Radio (NR) Release-18. The precise resolution of integer ambiguities is the key to accuracy of carrier phase positioning. In this paper, we propose a new triple-frequency ambiguity resolution in the 5G NR systems, which resolves ambiguities by combining triple-frequency observations. In additional, based on the frequency range of 5G NR systems, the optimal carrier phase combinations are analyzed in this article. Furthermore, we propose a search method based on cost function to optimize the resolution of integer ambiguities. Numerical simulations show that proposed method can achieve a centimeter-level accuracy in wireless cellular networks.