Experimental evaluation of a digitized fiber-wireless system employing sigma delta modulation

• Type: Article in International Scientific Journal
• Date: 2014

Authors

L. M. Pessoa (Author) FEUP; Tavares, JS (Author) Other; Coelho, D (Author) Other; H. M. Salgado (Author) FEUP

Journal

Title: Optics Express

Vol. 22

Pages: 17508-17523

ISSN: 1094-4087

Publisher: Optical Society of America

Indexing

ISI Web of Knowledge - 27 Citations

Scopus - 29 Citations

Other information

Authenticus ID: P-009-PDH

DOI: 10.1364/oe.22.017508

Abstract (EN): Digitized radio-over-fiber (D-RoF) transport schemes are being pointed as viable alternative solutions to their analog counterparts, in order to avoid distortion/dynamic range problems. Here we propose a novel D-RoF architecture that takes advantage of a bandpass sigma-delta modulator at the transmitter which subsequently permits the usage of a simpler/cheaper base station that avoids the employment of a digital to analog converter. The proposed architecture exploits the properties of the digital signal to enable the extraction of an higher carrier frequency through the employment of a bandpass filter. Furthermore, we present a comprehensive analysis regarding the impact of a low-cost electro-optic modulation on the quality of received demodulated signal. Finally, a comparison performance analysis between the conventional D-RoF and the proposed architecture is presented. We conclude that although the proposed architecture performs similarly to conventional D-RoF schemes, it is more competitive for either upgrading installed systems as well as for new deployments. (C) 2014 Optical Society of America

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 16