BDS-3 dynamic data characteristics for new signals of B1C/B2a and PPP accuracy analysis

The vehicle dynamic data characteristics for BDS-3 new signals of B1C/B2a are analyzed using four indices, i.e. carrier noise ratio (CNR), data integrity rate, observation noise and multipath. The kinematic precise point positioning (PPP) performance for BDS-3 new signals is also tested and compared with the other GNSS. The test results show that the average CNR of BDS-3 B2a new frequency is better than those of the other BDS frequencies, but slightly worse than that of GPS L5. The data integrity rate of BDS is relatively higher compared with the other GNSS. Further, the data integrity rate of the BDS-3 B2a new frequency is the highest. The noise of BDS-3 pseudorange observation at B2b frequency is the lowest, and the pseudorange observation noise at B1C and B2a frequencies is about three times of that of the B2b signal. However, the noise of phase observations at different frequencies is in the same level. For pseudorange multipath, the BDS-3 B1C/B2a signal is slightly smaller than the B2b signal, and overall, the GPS L5 signal has the strongest ability to suppress the multipath. In terms of kinematic PPP performance, the BDS-3 B1C/B2a dual-frequency combined kinematic PPP achieves the best positioning accuracy with a three-dimensional root mean square error of 0.439 m. Compared with the BDS B1I/B3I, GPS L1/L2, GLONASS G1/G2, and Galileo E1/E5a dual-frequency combined PPP, the accuracy improvement rates are 49%、56%、81% and 42% respectively.