Joint Modulation Format Identification and Frequency Offset Estimation Based on Superimposed LFM Signal and FrFT

We propose a novel technique for joint modulation format identification and frequency offset (FO) estimation. The linear frequency modulation signal which is obtained by a direct current signal and Fractional Fourier Transform (FrFT) is superimposed on the data symbols to mark and identify the modul...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	IEEE photonics journal 2019-10, Vol.11 (5), p.1-12
Hauptverfasser:	Guo, Yuxiao, Wang, Muguang, Li, Yaozu, Mu, Hongqian, Wu, Beilei, Liu, Yan, Yan, Fengping
Format:	Artikel
Sprache:	eng
Schlagworte:	Chirp Direct current Estimation Fiber optic communications Format Fourier transforms Fractional Fourier Transform Frequency analysis Frequency modulation Frequency offset estimation Linear frequency modulation Modulation format identification Optical communication Peak to average power ratio Phase shift keying Quadrature amplitude modulation Signal to noise ratio
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	We propose a novel technique for joint modulation format identification and frequency offset (FO) estimation. The linear frequency modulation signal which is obtained by a direct current signal and Fractional Fourier Transform (FrFT) is superimposed on the data symbols to mark and identify the modulation formats. Simulation results demonstrate our method can identify the DPBPSK, DPQPSK, DP8PSK, DP16QAM, DP32QAM and DP64QAM modulation formats correctly before chromatic dispersion compensation even the optical signal to noise ratio is extremely low. Additionally, due to the excellent time and frequency analysis properties of FrFT, the FO estimation range is greatly extended compared with the traditional Viterbi-Viterbi method.
ISSN:	1943-0655 1943-0647
DOI:	10.1109/JPHOT.2019.2944064