PT  - JOURNAL ARTICLE
AU  - Liu, Cheng
AU  - Gao, Weiguang
AU  - Liu, Tianxiong
AU  - Wang, Dun
AU  - Yao, Zheng
AU  - Gao, Yang
AU  - Nie, Xin
AU  - Wang, Wei
AU  - Li, Dongjun
AU  - Zhang, Weixing
AU  - Wang, Dongxia
AU  - Rao, Yongnan
TI  - Design and implementation of a BDS precise point positioning service
AID  - 10.1002/navi.392
DP  - 2020 Dec 21
TA  - NAVIGATION: Journal of the Institute of Navigation
PG  - 875--891
VI  - 67
IP  - 4
4099  - https://navi.ion.org/content/67/4/875.short
4100  - https://navi.ion.org/content/67/4/875.full
SO  - NAVIGATION2020 Dec 21; 67
AB  - Precise point positioning (PPP) service is of great significance for BDS. The design and implementation of the service are presented. The PPP-B2b signal of the service is constructed, which is efficient multiplexed with other signal components, and achieves compatibility between two service phases. A customized message format that can augment all visible satellites of four core constellations in mainland China is proposed. The high-gain, 64-ary, low-density parity check (LDPC) coding is used, which facilitates the integrated design of the receivers. A signal quality test has revealed that the S-curve bias (SCB) of PPP-B2b does not exceed 0.0165 ns and the coherence between the code and the carrier of the signal is only 0.137°. A performance evaluation has indicated that at its current stage, the positioning accuracy in the horizontal and vertical directions is better than 0.15 m and 0.3 m, respectively, and the convergence time does not exceed 800 s.