Frequency offset estimation in the intermediate frequency for satellite-based AIS signals

In this paper, an accurate frequency offset estimator is investigated in the intermediate frequency for the satellite-based automatic identification system (AIS) signals. Using Gaussian minimum shift keying (GMSK) modulation for transmission, the AIS signal is shown to be a plane wave with the modul...

Full description

Saved in:
Bibliographic Details
Published inOptoelectronics letters Vol. 14; no. 4; pp. 301 - 305
Main Authors Meng, Xin, Ma, She-xiang, Liu, Chen, Teng, Jian-fu
Format Journal Article
LanguageEnglish
Published Tianjin Tianjin University of Technology 01.07.2018
Springer Nature B.V
Subjects
Amplitudes
Carrier frequencies
Computer simulation
Fast Fourier transformations
Intermediate frequencies
Interpolation
Keying
Lasers
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Plane waves
A
Online AccessGet full text

Cover

More Information
Summary:In this paper, an accurate frequency offset estimator is investigated in the intermediate frequency for the satellite-based automatic identification system (AIS) signals. Using Gaussian minimum shift keying (GMSK) modulation for transmission, the AIS signal is shown to be a plane wave with the modulated phase information and carrier frequency resulting from the Doppler effects. Hence, the phase information can be eliminated with a re-modulated signal, and the frequency offset can be estimated by the ratio of the maximum spectral amplitude and its neighbor spectral amplitude based on the fast Fourier transformation (FFT) interpolation. The estimator has low complexity, and it is easy to implement. Computer simulations are used to assess the performance of the estimator.
ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-018-8044-7