Title :
Frequency Estimation for Optical Coherent MPSK System Without Removing Modulated Data Phase
Author :
Cao, Yinwen ; Yu, Song ; Shen, Jing ; Gu, Wanyi ; Ji, Yuefeng
Author_Institution :
Key Lab. of Inf. Photonics & Opt. Commun. (Minist. of Educ.), Beijing Univ. of Posts & Telecommun., Beijing, China
fDate :
5/15/2010 12:00:00 AM
Abstract :
By investigating the spectrum property of the frequency offset in an optical coherent M -ary phase-shift-keying system, a frequency estimation is presented based on fast Fourier transform of the signal´s argument. Different from the previous algorithms, it does not require removing modulated data phase. The principle of the algorithm is proven and a flowchart is proposed to illustrate the algorithm. Numerical simulations are performed to demonstrate the algorithm.
Keywords :
fast Fourier transforms; flowcharting; frequency estimation; light coherence; phase shift keying; M-ary phase-shift-keying system; fast Fourier transform; flowchart; frequency estimation; numerical simulations; optical coherent MPSK system; Coherent detection; fast Fourier transform (FFT); quadrature phase-shift keying (QPSK);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2010.2044170
