期刊
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
卷 21, 期 3, 页码 1694-1709出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TWC.2021.3106172
关键词
Distance measurement; Clocks; Location awareness; Protocols; Time-frequency analysis; Wireless communication; Particle measurements; Network ranging; localization; clock drift; time of flight; time difference of flight
资金
- Basic Research Strengthening Program of China (173 Program) [2020-JCJQ-ZD015-01]
- National Key Research and Development Program of China [2020YFC1511803]
- National Natural Science Foundation of China [61871256]
This paper presents a network localization framework that fully mitigates clock drifts with minimum signal overhead by using signal multiplexing and exploiting the interconnections of timestamps. It allows for high-precision localization even in the presence of clock drifts.
Precise range information is essential for high-precision network localization, where clock drifts will severely degrade the ranging accuracy. Two-way ranging methods are commonly adopted to mitigate those effects in localization networks but requiring a large amount of signal transmission to measure the distance between all pairs of nodes. This paper establishes a network localization framework, which fully mitigates clock drifts using only a minimum number of signal transmissions. The enabler is the proposed signal-multiplexing network ranging (SM-NR) method that minimizes communication overhead via signal multiplexing and eliminates clock drifts by exploiting the interconnections of timestamps. The proposed localization framework also allows some nodes to work in silent mode, of which the positions can be precisely determined without extra ranging signal transmissions. Simulation results show that the proposed algorithm can achieve high-precision localization in the presence of clock drifts with minimum signal overhead.
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