Self-interference suppression in full-duplex MIMO relays

Lioliou, Panagiota; Viberg, Mats; Coldrey, Mikael; Athley, Fredrik

doi:10.1109/acssc.2010.5757643

Cited by 104 publications

(74 citation statements)

References 10 publications

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“…In this paper, we consider LI mitigation in the spatial domain, in order to keep the complexity low. For FD systems with multiple antennas, the suppression of LI in the spatial domain has been addressed in the literature i.e., [21], [24], where the low rank of the spatial LI channel is exploited to avoid the transmit signal noise, which is the main source of the residual LI. Alternatively, the LI can be mitigated in the time domain using analogue or/and digital LI cancelation.…”

Section: A Notationmentioning

confidence: 99%

“…The optimal power allocation with a total power constraint p s + p d = P T can then be optimized similar to (24).…”

Section: Joint S-d Power Allocation 1) Optimal Solutionmentioning

confidence: 99%

“…When it comes to relaying, the FD operation can utilize the channel more effectively by achieving end-to-end transmission in one channel use, as long as the loop interference (LI) that leaks from the relay output to the relay input can be addressed [19], [20]. Antenna isolation, time cancelation and spatial precoding have been proposed in the literature for the mitigation of LI [21], [22], [23], [24]. Comparison of the HD and the FD systems with transmit power adaptation is given in [25].…”

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confidence: 99%

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Improving Physical Layer Secrecy Using Full-Duplex Jamming Receivers

Zheng

Krikidis

et al. 2013

IEEE Trans. Signal Process.

371

285

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Abstract-This paper studies secrecy rate optimization in a wireless network with a single-antenna source, a multi-antenna destination and a multi-antenna eavesdropper. This is an unfavorable scenario for secrecy performance as the system is interference-limited. In the literature, assuming that the receiver operates in half duplex (HD) mode, the aforementioned problem has been addressed via use of cooperating nodes who act as jammers to confound the eavesdropper. This paper investigates an alternative solution, which assumes the availability of a full duplex (FD) receiver. In particular, while receiving data, the receiver transmits jamming noise to degrade the eavesdropper channel. The proposed self-protection scheme eliminates the need for external helpers and provides system robustness. For the case in which global channel state information is available, we aim to design the optimal jamming covariance matrix that maximizes the secrecy rate and mitigates loop interference associated with the FD operation. We consider both fixed and optimal linear receiver design at the destination, and show that the optimal jamming covariance matrix is rank-1, and can be found via an efficient 1-D search. For the case in which only statistical information on the eavesdropper channel is available, the optimal power allocation is studied in terms of ergodic and outage secrecy rates. Simulation results verify the analysis and demonstrate substantial performance gain over conventional HD operation at the destination.

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Section: A Notationmentioning

confidence: 99%

“…The optimal power allocation with a total power constraint p s + p d = P T can then be optimized similar to (24).…”

Section: Joint S-d Power Allocation 1) Optimal Solutionmentioning

confidence: 99%

mentioning

confidence: 99%

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Improving Physical Layer Secrecy Using Full-Duplex Jamming Receivers

Zheng

Krikidis

et al. 2013

IEEE Trans. Signal Process.

371

285

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“…The main drawback of this approach is that the ZF solution only exists given that the numbers of antennas at the source, full-duplex relay and the receiver satisfy a certain condition. In order to overcome this limitation, [13] adopts an alternative criterion and proposes to maximize the signal-to-interference ratios between the power of the useful signal to the power of LI at the relay input and output, respectively. Conventional ZF precoding and decoding are chosen via the singular vectors of the LI channels, however, this design does not take into account the other channels and the end-to-end (e2e) performance.…”

Section: Introductionmentioning

confidence: 99%

“…MIMO provides an effective means to suppress the LI in the spatial domain [6], [13], [14]. With multiple transmit or receive antennas at the full-duplex relay, precoding at the transmitter and decoding at the receiver can be jointly optimized to mitigate the LI effects.…”

Section: Introductionmentioning

confidence: 99%

Low-Complexity End-to-End Performance Optimization in MIMO Full-Duplex Relay Systems

Suraweera

Krikidis

Zheng

et al. 2014

IEEE Trans. Wireless Commun.

257

203

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In this paper, we deal with the deployment of full-duplex relaying in amplify-and-forward (AF) cooperative networks with multiple-antenna terminals. In contrast to previous studies, which focus on the spatial mitigation of the loopback interference (LI) at the relay node, a joint precoding/decoding design that maximizes the end-to-end (e2e) performance is investigated. The proposed precoding incorporates rank-1 zero-forcing (ZF) LI suppression at the relay node and is derived in closed-form by solving appropriate optimization problems. In order to further reduce system complexity, the antenna selection (AS) problem for full-duplex AF cooperative systems is discussed. We investigate different AS schemes to select a single transmit antenna at both the source and the relay, as well as a single receive antenna at both the relay and the destination. To facilitate comparison, exact outage probability expressions and asymptotic approximations of the proposed AS schemes are provided. In order to overcome zerodiversity effects associated with the AS operation, a simple power allocation scheme at the relay node is also investigated and its optimal value is analytically derived. Numerical and simulation results show that the joint ZF-based precoding significantly improves e2e performance, while AS schemes are efficient solutions for scenarios with strict computational constraints. Index TermsMIMO relay networks, full-duplex relaying, precoding, antenna selection, outage probability. H. A. Suraweera is with the

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Full‐Duplex in Wireless Communications

Riihonen

Wichman

2016

Wiley Encyclopedia of Electrical and Electronics Engineering

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In‐band full‐duplex transceivers are able to transmit and receive simultaneously at the same frequency band. In wireless communications, such technology can offer potentially 100% increase in throughput when uplink and downlink simultaneously share the same band(s). In practice, this requires that a full‐duplex device is able to mitigate the inherent self‐interference caused by the leakage of the transmitted signal to the receiver chain. On the network level, full‐duplex devices change the statistics of cochannel interference in the system, which must be handled with appropriate medium access control. In addition, the capability of transmitting and receiving simultaneously gives gain only when there is enough buffered data to be transmitted in both ways. In practice, the gain from full‐duplex operation is less than 100%, but nevertheless theoretical studies and full‐duplex prototypes have demonstrated that it can still be substantial. This article presents an overview of the state‐of‐the‐art full‐duplex technology in wireless communications describing its performance and discussing challenges to make full‐duplex operation widely adopted in emerging systems.

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Self-interference suppression in full-duplex MIMO relays

Cited by 104 publications

References 10 publications

Improving Physical Layer Secrecy Using Full-Duplex Jamming Receivers

Improving Physical Layer Secrecy Using Full-Duplex Jamming Receivers

Low-Complexity End-to-End Performance Optimization in MIMO Full-Duplex Relay Systems

Full‐Duplex in Wireless Communications

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