Frequency offset estimation in the intermediate frequency for satellite-based AIS signals |
| |
Authors: | MENG Xin MA She-xiang LIU Chen TENG Jian-fu |
| |
Affiliation: | 1.School of Electronic Information Engineering,Tianjin University,Tianjin,China;2.Maritime College,Tianjin University of Technology,Tianjin,China;3.School of Electrical and Electronic Engineering,Tianjin University of Technology,Tianjin,China |
| |
Abstract: | 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. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
| 点击此处可从《光电子快报》浏览原始摘要信息 |
|
点击此处可从《光电子快报》下载全文 |
|