Frequency offset estimation in the intermediate frequency for satellite-based AIS signals
| Autor: | Shexiang Ma, Jianfu Teng, Chen Liu, Xin Meng |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
05 social sciences Fast Fourier transform Estimator 020206 networking & telecommunications 02 engineering and technology Minimum-shift keying Condensed Matter Physics Signal Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Intermediate frequency Transmission (telecommunications) Modulation 0502 economics and business 0202 electrical engineering electronic engineering information engineering Frequency offset Electrical and Electronic Engineering Algorithm 050203 business & management |
| Zdroj: | Optoelectronics Letters. 14:301-305 |
| ISSN: | 1993-5013 1673-1905 |
| DOI: | 10.1007/s11801-018-8044-7 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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