Novel multi-tap analog self-interference cancellation architecture with shared phase-shifter for full-duplex communications
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Multi-tap analog self-interference (SI) cancellation structures adopt parallel taps to reconstruct and then cancel SI in full-duplex radios. Each tap is usually comprised of one fixed delay line, one variable attenuator, and one optional variable phase shifter. To balance the quantity of the variable phase shifters and the achievable SI cancellation (SIC) performance, this paper proposes a novel analog SIC cancellation structure, called shared-phase-shifter constrained multi-tap structure (SMTS). In the proposed architecture, all taps share one phase shifter to emulate the dominated phase offset of the SI channel, which reduces the complexity of the implementation of the multi-tap analog SIC structure and avoids the SIC performance degradation. Then, the proposed SMTS and the existing structures are compared in terms of SIC performance and power dissipation. Finally, extensive simulations show that SMTS provides the close-to-optimal SIC performance as well as the lowest power dissipation relative to the existing multi-tap structures.
Keywordsfull-duplex multi-tap structure power dissipation phase shifter self-interference cancellation
This work was supported by National Natural Science Foundation of China (Grant Nos. 61531009, 61501093, 61271164, 61471108) and Fundamental Research Funds for the Central Universities.
- 2.Ma Z, Zhang Z Q, Ding Z G, et al. Key techniques for 5G wireless communications: network architecture, physical layer, and MAC layer perspectives. Sci China Inf Sci, 2015, 58: 041301Google Scholar
- 4.Zhang G P, Yang K, Liu P, et al. Using full duplex relaying in device-to-device (D2D) based wireless multicast services: a two-user case. Sci China Inf Sci, 2015, 58: 082301Google Scholar
- 5.Zhang Z L, Shen Y, Shao S H, et al. Full duplex 2×2 MIMO radios. In: Proceedings of International Conference on Wireless Communications and Signal Processing (WCSP’14), Hefei, 2014. 1–6Google Scholar
- 6.Kolodziej K E, McMichael J G, Perry B T. Adaptive RF canceller for transmit-receive isolation improvement. In: Proceedings of IEEE Radio and Wireless Symposium (RWS’14), Newport Beach, 2014. 172–174Google Scholar
- 7.Chen T Y, Liu S. A multi-stage self-interference canceller for full-duplex wireless communications. In: Proceedings of IEEE Global Communications Conference (GLOBECOM’15), San Diego, 2015. 1–6Google Scholar
- 9.Choi J, Jain M, Srinivasan K, et al. Achieving single channel, full duplex wireless communication. In: Proceedings of the 16th Annual International Conference on Mobile Computing and Networking (MobiCom’10), Chicago, 2010. 1–12Google Scholar
- 10.Jain M, Choi J I, Kim T, et al. Practical, real-time, full duplex wireless. In: Proceedings of the 17th Annual International Conference on Mobile Computing and Networking (MobiCom’11), Las Vegas, 2011. 301–312Google Scholar
- 12.Bharadia D, Katti S. Full duplex MIMO radios. In: Proceedings of the 11th USENIX Conference on Networked Systems Design and Implementation (NSDI’14), Seattle, 2014. 359–372Google Scholar
- 14.Wu X Y. The measurement and analysis of the co-time co-frequency full-duplex self-interference channel. Dissertation for the Doctoral Degree. Chengdu: University of Electronic Science and Technology of China, 2015. 40–41, 66–67Google Scholar
- 17.Goldsmith A. Wireless Communications. New York: Cambridge University Press, 2005. 26–27Google Scholar
- 21.Petersen K B, Pedersen M S. The Matrix Cookbook. Massachusetts Institute of Technology (MIT) Tech Rep. 2012Google Scholar