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SCIENCE CHINA Information Sciences, Volume 59, Issue 4: 042303(2016) https://doi.org/10.1007/s11432-015-5365-z

Self-mixed self-interference analog cancellation in full-duplex communications

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  • ReceivedJun 15, 2015
  • AcceptedAug 11, 2015
  • PublishedFeb 3, 2016

Abstract

rather than using existing self-interference cancellation methods, which essentially consist of reconstruction and subtraction, this paper proposes a novel approach, based on multiplication, to cancel self-interference in the analog domain in full-duplex communications. This approach is called self-mixed self-interference analog cancellation (SM-SIAC). Moreover, rather than using an individual analog cancellation circuit in existing self-interference cancellation methods, SM-SIAC can merge the analog cancellation circuit and the receiver. SM-SIAC is configured with three auto-tuning loops, consisting of one delay loop and two gain loops. SM-SIAC is further simplified with the Gaussian minimum shift keying (GMSK) self-interference signal. When these loops converge, the paper analyzes the cancellation capacity and derives a closed-form expression for the quadrature amplitude modulation self-interference signal and the GMSK self-interference signal. Simulation results illustrate the convergence of the gain loops and the cancellation capacity in the presence of engineering errors.


Funded by

national Natural Science Foundation of China(61271164)

national Natural Science Foundation of China(61471108)

national Natural Science Foundation of China(61201266)

national Major Projects(2014ZX03003001-002)

national High-tech R&D Program of China(863 Program)

(2014AA01A704)

(2014AA01A706)


Acknowledgment

Acknowledgments

This work was supported by national Natural Science Foundation of China (Grant Nos. 61271164, 61471108, 61201266), national Major Projects (Grant No. 2014ZX03003001-002), and national High-tech R&D Program of China (863 Program) (Grant Nos. 2014AA01A704, 2014AA01A706).


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