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Optical Engineering

Directly modulated laser-based optical radio frequency self-interference cancellation system
Author(s): Shaojie Zhang; Shilin Xiao; Yunhao Zhang; Hanlin Feng; Lu Zhang; Zhao Zhou
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Paper Abstract

We propose a microwave photonics system for radio frequency self-interference cancellation using optical techniques. With a simple structure, this system employs two low-cost directly modulated lasers and a balanced photodetector to subtract the strong self-interference signal from a corrupted received signal. For commonly used wireless applications, 40-dB cancellation within 900-MHz band and 33-dB cancellation within 2.4-GHz band are experimentally obtained, both over 400-MHz bandwidth. Moreover, for ultra-wideband cancellation, this system achieves more than 27-dB cancellation over 6-GHz bandwidth. The experimental results show good recovery of the weak signal of interest buried by strong self-interference after the cancellation.

Paper Details

Date Published: 18 February 2016
PDF: 5 pages
Opt. Eng. 55(2) 026116 doi: 10.1117/1.OE.55.2.026116
Published in: Optical Engineering Volume 55, Issue 2
Show Author Affiliations
Shaojie Zhang, Shanghai Jiao Tong Univ. (China)
Shilin Xiao, Shanghai Jiao Tong Univ. (China)
Yunhao Zhang, Shanghai Jiao Tong Univ. (China)
Hanlin Feng, Shanghai Jiao Tong Univ. (China)
Lu Zhang, Shanghai Jiao Tong Univ. (China)
Zhao Zhou, State Grid Hunan Electric Power Co. (China)

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