TY - JOUR
T1 - Impact Assessment of the Asynchronous Clocks between Reference and User Receivers in Differential Pseudolite Navigation System
AU - Dou, Jie
AU - Xu, Bing
AU - Dou, Lei
N1 - Funding Information:
Manuscript received June 29, 2020; accepted July 27, 2020. Date of publication August 4, 2020; date of current version December 4, 2020. This work was supported in part by the National Natural Science Foundation of China under Grant 60904085; in part by the Foundation of National Key Laboratory of Transient Physics; and in part by the Foundation of Defence Technology Innovation Special Filed. The associate editor coordinating the review of this article and approving it for publication was Prof. Shih-Chia Huang. (Corresponding author: Lei Dou.) Jie Dou and Lei Dou are with the School of National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, China (e-mail: [email protected]; [email protected]).
Publisher Copyright:
© 2001-2012 IEEE.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2021/1/1
Y1 - 2021/1/1
N2 - Compared with the Global Navigation Satellite System (GNSS), the asynchronous pseudolite (PL) navigation system does not provide corrections for the frequency deviation between PL signals. To realize precise positioning, a reference receiver is utilized to reduce the effect of frequency deviation between PLs via the differential method using carrier phase measurements. However, there exists time deviation between the user and reference receivers due to their asynchronous clocks. With this time deviation, the effect of frequency deviation between PLs cannot be removed thoroughly. Theoretical derivation and experimental verification indicate that the residual error in double difference of carrier phase measurements is proportional to the frequency deviation between PLs and the time deviation between receivers. To solve this problem, two approaches, refer to hardware and software methods, are proposed, which are experimentally proven to be feasible.
AB - Compared with the Global Navigation Satellite System (GNSS), the asynchronous pseudolite (PL) navigation system does not provide corrections for the frequency deviation between PL signals. To realize precise positioning, a reference receiver is utilized to reduce the effect of frequency deviation between PLs via the differential method using carrier phase measurements. However, there exists time deviation between the user and reference receivers due to their asynchronous clocks. With this time deviation, the effect of frequency deviation between PLs cannot be removed thoroughly. Theoretical derivation and experimental verification indicate that the residual error in double difference of carrier phase measurements is proportional to the frequency deviation between PLs and the time deviation between receivers. To solve this problem, two approaches, refer to hardware and software methods, are proposed, which are experimentally proven to be feasible.
KW - clock synchronization
KW - Global navigation satellite system
KW - oven controlled crystal oscillators
KW - pseudolites
UR - http://www.scopus.com/inward/record.url?scp=85097719016&partnerID=8YFLogxK
U2 - 10.1109/JSEN.2020.3014103
DO - 10.1109/JSEN.2020.3014103
M3 - Journal article
AN - SCOPUS:85097719016
SN - 1530-437X
VL - 21
SP - 403
EP - 411
JO - IEEE Sensors Journal
JF - IEEE Sensors Journal
IS - 1
M1 - 9157995
ER -