Wideband Over-the-Air RF Self-Interference Cancellation by an EML-Based Optical System With Baseband Predistortion

IEEE Photonics Journal

Yinghong Yu¹  Weisheng Hu¹  Yunhao Zhang¹  Longsheng Li¹  Meihua Bi¹  Shilin Xiao¹ 

[1] State Key Lab of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, China;

关键词: RF self-interference cancellation;    pre-distortion;    microwave photonics;    IBFD;    OFDM.;   

DOI  :  10.1109/JPHOT.2017.2747561

来源: DOAJ

【 摘 要 】

In this paper, we propose and experimentally demonstrate an optical self-interference cancellation (OSIC) system with baseband predistortion for wideband over-the-air in-band full-duplex (IBFD) communication. The key factors of OSIC bandwidth limitation are analyzed, and the solution toward it is proposed for the first time. Experimental results show that, by traditional OSIC under over-the-air condition, only narrow even zero band is with enough cancellation depth to satisfy IBFD. But with our proposed baseband predistortion scheme, deep OSIC depth is achieved over the whole 1 GHz/5 GHz baseband within the total 7–25 GHz available band of horn antennas. The employment of baseband predistortion obviously broadens the cancellation bandwidth of an EML-based OSIC system. The largest OSIC bandwidth for over-the-air IBFD communication is demonstrated so far.

【 授权许可】

Unknown