Journal
SCIENCE CHINA-INFORMATION SCIENCES
Volume 65, Issue 11, Pages -Publisher
SCIENCE PRESS
DOI: 10.1007/s11432-021-3303-0
Keywords
full duplex; self-interference cancellation; PA nonlinearity; digital domain; performance analysis
Funding
- National Natural Science Foundation of China [61771107, 61701075, 61601064]
- National Key R&D Program of China [2018YFB1801903]
Ask authors/readers for more resources
This paper presents the theoretical analysis and comparison of digital nonlinear self-interference cancellation using RF signal feedback and nonlinear modeling in full-duplex systems. The theoretical capabilities of the two methods are derived and validated through simulations, along with the discussion of factors affecting their performance.
As the impairments of hardware circuits, such as the nonlinearities of power amplifiers (PAs), limit the self-interference suppression performance in full-duplex systems, nonlinear self-interference cancellation (SIC) has attracted much research attention. According to some existing studies, nonlinear SIC in full-duplex systems can be implemented with either nonlinear modeling or radio frequency (RF) signal feedback. However, to the best of our knowledge, there is no theoretical analysis and comparison of the cancellation performance with the two methods. In this paper, the performance of the digital nonlinear SIC with RF signal feedback and nonlinear modeling is analyzed and compared for the first time. The theoretical SIC capabilities of the two methods are derived, and the closed-form solutions are obtained. The factors affecting the performance of the two methods are discussed with the theoretical analysis. Then, by simulations, the theoretical results are verified and the performances of the nonlinear SIC with the two methods are compared in different environments.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available