Open AccessTiming, carrier frequency and phase recovery for OFDM and Nyquist signals using a mean modulus algorithm
Author(s) -
R. Schmogrow,
B. Nebendahl,
Arne Josten,
P. C. Schindler,
C. Koos,
W. Freude,
J. Leuthold
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.009344
Subject(s) - nyquist–shannon sampling theorem , carrier frequency offset , orthogonal frequency division multiplexing , computer science , algorithm , nyquist rate , phase noise , carrier recovery , qam , quadrature amplitude modulation , electronic engineering , phase (matter) , bit error rate , optics , frequency offset , sampling (signal processing) , telecommunications , physics , carrier signal , transmission (telecommunications) , engineering , decoding methods , channel (broadcasting) , quantum mechanics , detector , computer vision
Efficient algorithms for timing, carrier frequency and phase recovery of Nyquist and OFDM signals are introduced and experimentally verified. The algorithms exploit the statistical properties of the received signals to efficiently derive the optimum sampling time, the carrier frequency offset, and the carrier phase. Among the proposed methods, the mean modulus algorithm (MMA) shows a very robust performance at reduced computational complexity. This is especially important for optical communications where data rates can exceed 100 Gbit/s per wavelength. All proposed algorithms are verified by simulations and by experiments using optical M-ary QAM Nyquist and OFDM signals with data rates up to 84 Gbit/s.
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