A Survey of In-Band Full-Duplex Transmission: From the Perspective of PHY and MAC Layers

Kim, Dongkyu; Lee, Haesoon; Hong, Daesik

doi:10.1109/comst.2015.2403614

Cited by 552 publications

(322 citation statements)

References 180 publications

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“…3) It is also assumed that the relay suffers M CCI interferers in addition to additive white Gaussian noise (AWGN), while the destination is corrupted by AWGN. The practical justification of such an assumption is that two mobile users which are far from the cell edge exchange information with the aid of a relay that is close to the cell edge 3 . 4) Channels are modeled as quasi-static block flat fading and remain constant over the block time T , and varies independently and identically from one block to the next.…”

Section: The System Modelmentioning

confidence: 99%

MIMO Full-Duplex Relaying in the Presence of Co-Channel Interference

Almradi

Hamdi

2017

IEEE Trans. Veh. Technol.

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Abstract-This paper studies the deployment of multiple-input multiple-output (MIMO) full-duplex (FD) relaying systems in a multi-cell environment, where the source and destination nodes are equipped with single antenna and communicating via a dualhop amplify-and-forward (AF) relay station with multiple receive and transmit antennas in the presence of co-channel interference (CCI). This paper addresses the fundamental challenges of loopback self-interference (LI) and CCI when incorporating FD relaying in cellular systems. Due to the higher frequency reuse in FD relaying compared to its half-duplex (HD) relaying counterpart, the CCI is expected to double as the FD relay station simultaneously schedule uplink and downlink transmission on the same channel. The optimal design of relay receive and transmit precoding weight vectors which maximizes the overall signal-to-interefernce-plus-noise ratio (SINR) is formulated by a proper optimization problem, then a closed-form suboptimal solution based on null space projection is proposed. The proposed precoding vectors are based on the added receive and transmit zero-forcing (ZF) constraints used to suppress the co-channel interference and loopback self-interfernce, respectively. To this end, exact closed-form expressions for the outage probability and ergodic capacity are derived, where a simpler lower-bound expressions are also presented. In addition, the asymptotic high signal-to-noise ratio (SNR) outage probability approximation is also considered, through which the diversity order of the null space projection (ZF/ZF) scheme is found to achieve min (NR − M, NT − 1), where NR and NT are the number of relay receive and transmit antennas, respectively, and M is the number of CCI interferers. Numerical results sustained by Monte-Carlo simulations show the exactness of the proposed analytical expressions as well as the tightness of the proposed lower-bound expressions. In addition, simulation results for the minimum mean square error (MMSE)/ZF scheme is also considered for comparison purposes. Our results reveal that MIMO FD relaying could substantially boost the system performance compared to its conventional MIMO HD relaying counterpart.Index Terms-MIMO relaying, full-duplex relaying, halfduplex relaying, zero-forcing (ZF), minimum mean square error (MMSE), outage probability, ergodic capacity, co-channel interference.

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Section: The System Modelmentioning

confidence: 99%

MIMO Full-Duplex Relaying in the Presence of Co-Channel Interference

Almradi

Hamdi

2017

IEEE Trans. Veh. Technol.

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“…The canceling needs to be done either at the antennas, or before the A/D converter or in the digital baseband. Recently, there has been a significant progress in the self-interference cancellation, which presents a great opportunity to realize full duplex communications for the next generation of cellular networks [17].…”

Section: Full Duplexmentioning

confidence: 99%

Will 5G become yet another wireless technology for industrial automation?

Gidlund

Lennvall

Åkerberg

2017

2017 IEEE International Conference on Industrial Technology (ICIT)

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Abstract-With the growing interest in adoption of wireless technologies in industrial automation and the continuous search for new revenue streams new players are entering the arena in order to make their business grow further. One of the emerging wireless technologies aiming to support industrial automation applications is 5G, targeting anything from extreme throughput (> 10 Gbit/s) to extreme low latency (≤ 1 ms) to ultra high reliability (≥ 99.999%). In this article we intend to discuss the potential and challenges of adopting 5G in real industrial environments and give a more balanced picture compared to previous articles mainly written by telecom researchers and vendors as a way to promote their technology. Specifically, this article will discuss and provide some real industrial requirements, describe the main technical features of 5G and try to assess what applications it will support that are not by already supported by existing technologies. In the end, the success of 5G will depend on appealing business models and scalability, i.e., whether or not the same equipment can be deployed worldwide without any changes and spectrum rules, and the migration paths beyond 5G for reasonable business risks.

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“…Note that the SVD based approach in [14] and [7] is considered under specific assumptions on the number of relay receive and transmit antennas. However, to our best knowledge, the effect of co-channel interference (CCI) 1 on the overall performance of FD relaying with multipleantenna terminals has not been investigated yet, i.e., the general case of multiple antenna terminals with CCI at the relay and destination, utilizing transmit (receive) ZF beamforming (combining) has not been analyzed in the literature for both HD and FD relaying modes 2 . Note that ZF beamforming is employed particularly due to its robustness against the severe effects of CCI and fading, where this is achieved by steering the transmitted signal along the strongest eigenmodes of the source → relay (S → R) and relay → destination (R → D) null-space-projected channels.…”

Section: Introductionmentioning

confidence: 99%

“…This considerable amendment alongside the developments in antennas and radio-frequency (RF) circuit design render full-duplex communications feasible as the LI mitigation problem becomes viable. Various LI attenuation approaches have been proposed in the literature which may be classified into three phases: propagation (passive) domain LI cancellation, analog and digital (active) domain LI cancellation, and spatial domain LI cancellation (in the presence of multiple receive and/or transmit antennas at the FD node) [2], [4]- [12]. Owing to the significant hardware adjustment, high cost and power required by the terminal to operate in the FD mode, only infrastructure base stations are upgraded to operate on the FD mode, while user terminals persist to operate in the HD mode.…”

Section: Introductionmentioning

confidence: 99%

Hop-by-Hop ZF Beamforming for MIMO Full-Duplex Relaying With Co-Channel Interference

Almradi

Xiao

Hamdi

2018

IEEE Trans. Commun.

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Abstract-In this paper, a comprehensive design and analysis of multiple-input multiple-output (MIMO) full-duplex (FD) relaying systems in a multi-cell environment are investigated, where a multi-antenna amplify-and-forward (AF) FD relay station serves multiple half-duplex (HD) multi-antenna users. The pivotal obstacles of loopback self-interference (LI) and multiple co-channel interferers (CCI) at the relay and destination when employing FD relaying in cellular networks are addressed. In contrast to the HD relaying mode, the CCI in the FD relaying mode is predicted to double since the uplink and downlink communications are simultaneously scheduled via the same channel. In this paper, the optimal layout of transmit (receive) precoding (decoding) weight vectors which maximizes the overall signal-to-interefernce-plusnoise ratio (SINR) is constructed by a suitable optimization problem, then a closed-form sub-optimal formula based on null space projection is presented. The proposed hop-by-hop rank-1 zero-forcing (ZF) beamforming vectors are based on added ZF constraints used to suppress the LI and CCI channels at the relay and destination, i.e., the source and relay perform transmit ZF beamforming, while the relay and destination employ receive ZF combining. To this end, unified accurate expressions for the outage probability and ergodic capacity are derived in closed-form. In addition, simpler tight lower-bound formulas for the outage probability and ergodic capacity are presented. Moreover, the asymptotic approximations for outage probability is considered to gain insights into system behavior in terms of the diversity order and array gain. Numerical and simulation results show the accuracy of the presented exact analytical expressions and the tightness of the lower-bound expressions. The case of hopby-hop maximum-ratio transmission/maximal-ratio combining beamforming is included for comparison purposes. Furthermore, our results show that while multi-antenna terminals improve the system performance, the detrimental effect of CCI on FD relaying is clearly seen. Therefore, our findings unveil that MIMO FD relaying could significantly improve the system performance compared to its conventional MIMO HD relaying counterpart.Index Terms-MIMO relaying, full-duplex relaying, halfduplex relaying, beamforming, zero-forcing (ZF), outage probability, ergodic capacity, co-channel interference.

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A Survey of In-Band Full-Duplex Transmission: From the Perspective of PHY and MAC Layers

Cited by 552 publications

References 180 publications

MIMO Full-Duplex Relaying in the Presence of Co-Channel Interference

MIMO Full-Duplex Relaying in the Presence of Co-Channel Interference

Will 5G become yet another wireless technology for industrial automation?

Hop-by-Hop ZF Beamforming for MIMO Full-Duplex Relaying With Co-Channel Interference

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