Open AccessSelf-interference cancellation using dual-drive Mach-Zehnder modulator for in-band full-duplex radio-over-fiber system
Author(s) -
Yunhao Zhang,
Shilin Xiao,
Huijin Feng,
Lu Zhang,
Ziyou Zhou,
Weisheng Hu
Publication year - 2015
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.033205
Subject(s) - radio over fiber , radio frequency , multi band device , single antenna interference cancellation , wideband , orthogonal frequency division multiplexing , bandwidth (computing) , optical carrier transmission rates , wavelength division multiplexing , electro optic modulator , modulation (music) , broadband , telecommunications link , physics , optics , telecommunications , computer science , optical modulator , optical fiber , antenna (radio) , wavelength , phase modulation , phase noise , acoustics , channel (broadcasting) , detector
In this paper, we design a self-interference cancellation (SIC) scheme for in-band full-duplex (IBFD) radio-over-fiber (RoF) systems based on wavelength division multiplexing passive optical network (WDM-PON) architectures. By using a single dual-drive Mach-Zehnder modulator (DDMZM), over various bands up to 25 GHz, this proposed SIC system can simultaneously cancel the in-band downlink (DL) self-interference and modulate the recovered uplink (UL) radio frequency (RF) signal. OFDM-RF signals are used to study the cancellation performances of optical SIC system for the first time. Experimental results show more than 32-dB cancellation depth over 250-MHz bandwidth within 1-GHz RF band, as well as 300-MHz within 2.4-GHz and 400-MHz within 5-GHz band. As for 2.4-GHz RF band, 390.63-Mbps 16-QAM OFDM UL signal buried by strong in-band DL OFDM signal is well recovered. For broadband applications, more than 27-dB cancellation depth is achieved over 10 MHz~25 GHz wideband, so that up to 25 GHz RF band can be expanded for this IBFD WDM-RoF system.