Open AccessHigh accuracy phase‐matching delay estimation method based on phase correction
Author(s) -
Lu Jun,
Zhang Qunfei,
Shi Wentao,
Zhang Lingling
Publication year - 2020
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2019.3751
Subject(s) - group delay and phase delay , phase (matter) , interference (communication) , signal (programming language) , computer science , algorithm , control theory (sociology) , matching (statistics) , electronic engineering , mathematics , telecommunications , statistics , filter (signal processing) , physics , engineering , artificial intelligence , computer vision , channel (broadcasting) , control (management) , quantum mechanics , programming language
In the integrated system of underwater single‐node detection and communication, active self‐interference cancellation requires high accuracy of time delay estimation. To solve this problem, this Letter proposes a high accuracy delay estimation method based on phase correction. Initially, the normalised frequency correction is calculated according to the phase difference and time delay of the signal. Then, the discrete spectrum is reconstructed, and the phase is obtained by the least square method. Finally, the time delay is estimated by the phase difference between the received signal and the reference signal. This method corrects the phase and frequency errors caused by the Fourier transform and improves the accuracy of time delay estimation. Simulation results confirm the efficacy of the proposed method and achieve the accuracy requirement of the active self‐interference cancellation.