Citation

Gao Y, Deng Z, Zhang Y, Sun S, Li Z. Sensors (Basel) 2019; 19(20): s19204526.

Affiliation

School of Electronic Engineering, Beijing University of Post and Telecommunication, Beijing 100876, China. manniu677@gmail.com.

Copyright

(Copyright © 2019, MDPI: Multidisciplinary Digital Publishing Institute)

DOI

10.3390/s19204526

PMID

31627480

Abstract

To satisfy the service requirements of high accuracy and efficient life detection and location for search and rescue (SAR) missions after a disaster, we developed a passive positioning method to locate mobile phones by capturing the random access preamble, which can be applied to fourth-generation (4G) and even fifth-generation (5G) communication systems. We analyzed the characteristics of the random access procedure of a communication system and established a way to detect mobile phones by combining the time-difference-of-arrival (TDOA) estimation to determine the location. Then, we performed an experiment and a simulation of preamble sequence acquisition, and the results proved that the method is feasible and has high detection accuracy in high-noise conditions.

Language: en

Keywords

LTE; OFDM; passive positioning; preamble detect