A Novel High-Accuracy Ranging Method Based on Code and Carrier

A novel high-accuracy ranging method based on code and carrier without carrier-cycle integer ambiguity resolution is proposed. Firstly, get a coarse range measurement value with low measurement accuracy base on the pseudorandom code phase measurements. Secondly, select the carrier frequencies by using the coarse range value and accuracy to make the carrier-cycle integer ambiguity disappear. And lastly, use the selected carrier frequencies phases to measure the range again without carrier-cycle integer ambiguity resolution. Experimental results show the measurement accuracy can reach millimeter-level, and even better.