Analysis of RoF-echo effect on OFDM signal transmission with EPWM format

Author

Xiaoxue Yu ; Matsuura, Motoharu ; Yamao, Yasushi

Author_Institution

Adv. Wireless Commun. Res. Center, Univ. of Electro-Commun., Chofu, Japan

fYear

2013

fDate

24-27 June 2013

Firstpage

1

Lastpage

5

Abstract

Radio over Fiber (RoF) technology integrates wireless access into optical networks. It contributes much for spreading broadband wireless access services to in-building areas and outdoor dead-spots. However, OFDM signals which are widely employed in current broadband wireless access systems suffer from nonlinearity and echoes in RoF channels. The echoes are caused by multiple reflections of light and have long delay compared to the OFDM symbol duration. In this paper, a RoF-echo channel model is proposed and employed in the analysis of the echo effect on the RoF transmission. The validity of the model is confirmed by experimental results. The combined effects of nonlinear distortion and echoes in the RoF channel on normal OFDM and EPWM (Envelop Pulse-Width Modulation) formatted OFDM signals are analyzed and evaluated by measuring their EVM (Error Vector Magnitude) performances.

Keywords

OFDM modulation; broadband networks; optical fibre subscriber loops; optical transmitters; pulse width modulation; radio access networks; radio transmitters; radio-over-fibre; radiotelemetry; wireless channels; EPWM format; EVM; OFDM signal transmission; OFDM symbol duration; RoF channel; RoF-echo analysis effect; broadband wireless access service system; envelop pulsewidth modulation; error vector magnitude; nonlinear distortion; optical network; radio over fiber technology; wireless access network; Generators; OFDM; EPWM; Echo; OFDM; RoF; nonlinear distortion;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Personal Multimedia Communications (WPMC), 2013 16th International Symposium on

Conference_Location

Atlantic City, NJ

ISSN

1347-6890

Type

conf

Filename

6618561