Open AccessExperimental study of wideband in-band full-duplex communication based on optical self-interference cancellation
Author(s) -
Yunhao Zhang,
Shilin Xiao,
Yinghong Yu,
Cao Chen,
Meihua Bi,
Lu Zhang,
Weisheng Hu
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.030139
Subject(s) - wideband , bandwidth (computing) , broadband , spurious free dynamic range , single antenna interference cancellation , optics , computer science , electronic engineering , interference (communication) , adjacent channel interference , detector , telecommunications , wireless , channel (broadcasting) , physics , dynamic range , engineering
In this paper, we experimentally demonstrate and study a wideband in-band full-duplex (IBFD) wireless communication system based on optical self-interference cancellation (SIC). The optical SIC performances based on antennas for broadband IBFD are firstly evaluated within high frequency bands (> 10GHz). In this system, two electro-absorption-modulated lasers (EMLs) and a balanced photo-detector (BPD) are employed to remove the wideband self-interference within received wireless signal. By theoretical derivation and experimental verification, the impact factors of SIC are analyzed, especially for non-flatness wireless channel case. Experimental results show more than 30-dB cancellation depth in 100-MHz bandwidth with employment of horn antennas. Besides, IBFD transmission performance based on OFDM signals for different bandwidth with 11.15-GHz center frequency is also demonstrated, and ~52.2- dB•Hz 2/3 spurious-free dynamic range (SFDR) is obtained.