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

Wu, Fei; Li, Si; Shao, Shihai; Tang, Youxi

doi:10.1016/j.aeue.2016.10.006

Cited by 15 publications

(6 citation statements)

References 17 publications

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“…Rx, receiver; Tx, transmitter same location, but the IUI is not known at mobile user U2. Note that SI may be easily processed 1,2,[4][5][6][7][13][14][15][16][17][18] as the SI information is locally available at the FD BS. However, handling IUI is much more challenging as it is between distributed users who cannot share data information without sacrificing bandwidth resources.…”

Section: Bs U2 U1mentioning

confidence: 99%

“…Full‐duplex (FD) wireless communications simultaneously operate over the same frequency channel, which have the potential to double spectrum efficiency. () Full‐duplex communications contrast with half‐duplex (HD) communications, which are time‐division, frequency‐division, or code‐division for transmitting and receiving. In the past decades, the main obstacle of implementing the FD transceiver has been the large self‐interference (SI) leaking from the local transmitter because of the closeness of the transmitter and receiver chains.…”

Section: Introductionmentioning

confidence: 99%

“…The distinction between these 2 types of interference is that the SI signal is known at the BS receiver because the transmitter and the receiver are deployed at the same location, but the IUI is not known at mobile user U2. Note that SI may be easily processed () as the SI information is locally available at the FD BS. However, handling IUI is much more challenging as it is between distributed users who cannot share data information without sacrificing bandwidth resources.…”

Section: Introductionmentioning

confidence: 99%

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An interuser interference suppression approach in full‐duplex wireless communications

Zhang

et al. 2018

Trans Emerging Tel Tech

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Considering that a full‐duplex network is composed of a full‐duplex base station (BS) and 2 half‐duplex users, one user transmits on the uplink channel and the other receives through the downlink channel on the same frequency. The uplink user will generate interuser interference (IUI) on the downlink user through the interference channel. In this paper, we propose a novel IUI suppression scheme when the BS knows the full channel state information. The main idea of this scheme is to retransmit the weighted uplink signal as soon as it has been received by the BS. For the narrowband case, we first assess the performance of the proposed scheme through simulation with residual self‐interference at the BS. Specially, we derive the closed‐form expression of the optimum weighted coefficient when self‐interference is perfectly canceled at the BS and then discuss the performance of the proposed IUI suppression scheme in practical considerations. Furthermore, the proposed IUI suppression scheme can be extended to the broadband case using a time‐domain weighted filter. Simulation results show the advantage over existing IUI suppression schemes.

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Section: Bs U2 U1mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An interuser interference suppression approach in full‐duplex wireless communications

Zhang

et al. 2018

Trans Emerging Tel Tech

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“…[8][9][10][11] In theory, FD communications can double the spectral efficiency of the current wireless communication systems compared with conventional half-duplex systems. 16,17 Then, whether SI can be effectively eliminated is important to realize the double of the spectral efficiency. 16,17 Then, whether SI can be effectively eliminated is important to realize the double of the spectral efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…[12][13][14][15] However, FD communications suffer from very high self-interference (SI) coupled from the own transmitter to the receiver chain, with a little attenuation due to the short distance. 16,17 Then, whether SI can be effectively eliminated is important to realize the double of the spectral efficiency.…”

Section: Introductionmentioning

confidence: 99%

Multicast beamforming with LOS self‐interference cancellation in full‐duplex wireless communications

Liu

2018

Int J Communication

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In this paper, we consider a full-duplex system where the access point installed with multiple transmitting antennas and a single receiving antenna serves several single-antenna remote users. In this case, there are 2 kinds of interferences. One is the near-field self-interference (SI) induced by the simultaneous transmitting and receiving over the same band, and the other is the cochannel interference caused by the multicast broadcasting in the same band. A problem of near-field SI cancellation and the cochannel interference suppression using transmit beamforming is formulated at the access point. This problem of ensuring the near-field line-of-sight SI suppression benchmark and maximizing the minimum received signal-to-interference-plus-noise ratio of remote receivers leads to a nonconvex NP-hard optimization. Furthermore, we introduce a semidefinite relaxation technique coupled with linear program power adjustment and an outer bisection search loop to transform the problem into a convex optimization. This can be solved by the modern interior point methods. Simulations show that the proposed method is feasible even when the local receive antenna in near-field and the remote receivers in far field are in the same direction. KEYWORDSbeamforming, cochannel interference, full-duplex, self-interference cancellation, semidefinite relaxation Int J Commun Syst. 2018;31:e3544.wileyonlinelibrary.com/journal/dac

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An Auxiliary Antenna Based Inter-User Interference Mitigation Approach in Full-Duplex Wireless Networks

Wang

et al. 2018

Mobile Netw Appl

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

Cited by 15 publications

References 17 publications

An interuser interference suppression approach in full‐duplex wireless communications

An interuser interference suppression approach in full‐duplex wireless communications

Multicast beamforming with LOS self‐interference cancellation in full‐duplex wireless communications

An Auxiliary Antenna Based Inter-User Interference Mitigation Approach in Full-Duplex Wireless Networks

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