Wide-range frequency offset estimation method for a DD-OFDM-PON downstream system

Author

Chen, Longquan ; Qiao, Yaojun ; Zhao, Yuan ; Ji, Yuefeng

Author_Institution

State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun. (BUPT), Beijing, China

Volume

4

Issue

7

fYear

2012

fDate

7/1/2012 12:00:00 AM

Firstpage

565

Lastpage

570

Abstract

We propose a wide-range frequency offset estimation algorithm used in a direct detection orthogonal frequency division multiplexing passive optical network (DD-OFDM-PON) downstream system. Using this method, frequency offset is estimated according to the spectrum of the received DD-OFDM signal. The estimated frequency offset is used for frequency down-conversion in the digital domain to obtain the baseband OFDM signal. With this method, all data-bearing subcarriers should fall into the OFDM bandwidth after frequency down-conversion. The validity of the method is confirmed by an experiment with 20 Gb/s OFDM-PON downstream transmission.

Keywords

OFDM modulation; passive optical networks; DD-OFDM-PON downstream system; baseband OFDM signal; bit rate 20 Gbit/s; data-bearing subcarriers; direct detection orthogonal frequency division multiplexing passive optical network; wide-range frequency offset estimation; Estimation; Frequency estimation; OFDM; Optical filters; Optical modulation; Optical receivers; Passive optical networks; Frequency offset (FO); Optical fiber communication; Orthogonal frequency division multiplexing (OFDM); Passive optical network (PON);

fLanguage

English

Journal_Title

Optical Communications and Networking, IEEE/OSA Journal of

Publisher

ieee

ISSN

1943-0620

Type

jour

DOI

10.1364/JOCN.4.000565

Filename

6235190