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

Lu, Hongtao; Shao, Shihai; Deng, Kai; Tang, Youxi

doi:10.1007/s11432-015-5365-z

Cited by 8 publications

(4 citation statements)

References 22 publications

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“…which is the well-known Wiener solution 3) . Then the SIC performance provided by CMTS is computed with (11) and given as…”

Section: Appendix a Sic Performance Provided By Cmtsmentioning

confidence: 92%

“…In the past years, full-duplex (FD) communications have been attracting increasing research interests [1][2][3][4]. The most challenging problem for implementing FD radios is to cancel the extremely strong selfinterference (SI) from its transmitter to the local receiver.…”

Section: Introductionmentioning

confidence: 99%

“…The most challenging problem for implementing FD radios is to cancel the extremely strong selfinterference (SI) from its transmitter to the local receiver. For this purpose, various analog SI cancellation (SIC) schemes have been developed [1][2][3], among which multi-tap analog SIC scheme was shown to achieve excellent SIC performance [1].…”

Section: Introductionmentioning

confidence: 99%

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Novel multi-tap analog self-interference cancellation architecture with shared phase-shifter for full-duplex communications

Huang

Shao

et al. 2017

Sci. China Inf. Sci.

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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.

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“…which is the well-known Wiener solution 3) . Then the SIC performance provided by CMTS is computed with (11) and given as…”

Section: Appendix a Sic Performance Provided By Cmtsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Novel multi-tap analog self-interference cancellation architecture with shared phase-shifter for full-duplex communications

Huang

Shao

et al. 2017

Sci. China Inf. Sci.

Self Cite

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“…However, this method is easily affected by the related noise and other factors. Reference [27] adopts a self-mixing RF SI cancellation structure to achieve better SI cancellation for a gaussian minimum shift keying(GMSK) narrowband full duplex signal at a lower hardware complexity, but its application scope is limited, and the improvement of RF cancellation abilities based on this structure is not large.…”

Section: Introductionmentioning

confidence: 99%

A Novel Self-Interference Cancellation Method Using an Optimized LMS Algorithm in CCFD Systems for a 5G Communication Network

Sun

Zhao

2019

Applied Sciences

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The Co-frequency Co-time Full Duplex (CCFD) is a key concept in 5G wireless communication networks. The biggest challenge for CCFD wireless communication is the strong self-interference (SI) from near-end transceivers. Aiming at cancelling the SI of near-end transceivers in CCFD systems in the radio frequency (RF) domain, a novel time-varying Least Mean Square (LMS) adaptive filtering algorithm which is based on step-size parameters gradually decrease with time varying called the DTV-LMS algorithm is proposed in this paper. The proposed DTV-LMS algorithm in this paper establishes the non-linear relationship between step factor and the evolved arct-angent function, and using the relationship between the time parameter and error signal correlation value to coordinately control the step factor to be updated. This algorithm maintains a low computational complexity. Simultaneously, the DTV-LMS algorithm can also attain the ideal characteristics, including the interference cancellation ratio (ICR), convergence speed, and channel tracking, so that the SI signal in the RF domain of a full duplex system can be effectively cancelled. The analysis and simulation results show that the ICR in the RF domain of the proposed algorithm is higher than that in the compared algorithms and have a faster convergence speed. At the same time, the channel tracking capability has also been significantly enhanced in CCFD systems.

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Near-field self-interference suppression with subscriber beamforming in full-duplex communications

Shao

et al. 2016

AEU - International Journal of Electronics and Communications

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

Cited by 8 publications

References 22 publications

Novel multi-tap analog self-interference cancellation architecture with shared phase-shifter for full-duplex communications

Novel multi-tap analog self-interference cancellation architecture with shared phase-shifter for full-duplex communications

A Novel Self-Interference Cancellation Method Using an Optimized LMS Algorithm in CCFD Systems for a 5G Communication Network

Near-field self-interference suppression with subscriber beamforming in full-duplex communications

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