Real-Time 10.4-Gb/s Single-Band Optical 256/64/16QAM Receiver for OFDM-PON

Author

Ming Chen ; Jing He ; Jin Tang ; Xian Wu ; Lin Chen

Author_Institution

Coll. of Comput. Sci. & Electron. Eng., Hunan Univ., Changsha, China

Volume

26

Issue

20

fYear

2014

fDate

Oct.15, 15 2014

Firstpage

2012

Lastpage

2015

Abstract

In this letter, a 10.4-Gb/s real-time baseband orthogonal frequency division multiplexing (OFDM) receiver utilizing 256/64/16-quadrature amplitude modulation (QAM) adaptive modulation format, incorporating several key functionalities, including symbol synchronization, channel equalization, as well as sampling clock frequency synchronization is successfully implemented using a commercial field programmable gate array chip and a sample rate of 5-GS/s analog-to-digital converter. The performance of the real-time baseband OFDM receiver is experimentally investigated in an intensity-modulation and direct-detection optical communication system. The offline generated 10.4-Gb/s adaptively modulated 256/64/16QAM encoded optical OFDM signal with a high spectral efficiency of 4.84 bit/s/Hz can be successful transmitted over 20-km standard single mode fiber with a bit error rate <;3.8 × 10^-3. In addition, the frame miss probability is real-time measured in the receiver to obtain an optimal threshold value for the symbol synchronization.

Keywords

OFDM modulation; adaptive modulation; analogue-digital conversion; error statistics; field programmable gate arrays; intensity modulation; optical modulation; optical receivers; passive optical networks; quadrature amplitude modulation; synchronisation; telecommunication channels; 256-64-16-quadrature amplitude modulation adaptive modulation format; OFDM-PON; analog-to-digital converter; bit error rate; bit rate 10.4 Gbit/s; channel equalization; direct-detection optical communication system; distance 20 km; field programmable gate array chip; frame miss probability; intensity-modulation; key functionality; offline generated adaptively modulated 256-64-16QAM encoded optical OFDM signal; passive optical networks; real-time baseband OFDM receiver; real-time baseband orthogonal frequency division multiplexing receiver; real-time single-band optical 256-64-16QAM receiver; sample rate; sampling clock frequency synchronization; spectral efficiency; standard single mode fiber; symbol synchronization; Adaptive optics; OFDM; Optical receivers; Passive optical networks; Real-time systems; Synchronization; Real-time digital signal processing (DSP); intensity-modulated direct-detection (IMDD); orthogonal frequency division multiplexing (OFDM); spectral efficiency (SE);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2014.2344175

Filename

6868959