On the capacity of the interference channel with a relay

Marić, Ivana; Dabora, Ron; Goldsmith, Andrea

doi:10.1109/isit.2008.4595047

Cited by 81 publications

(87 citation statements)

References 12 publications

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“…The knowledge of the interference can either help the interfered transmit-receive pair subtract the interference, hereby increasing its direct transmission rate, or help the interfering transmitter-receiver pair increase its common message rate. This interference-forwarding strategy has been used in various studies, including interference channel models with a dedicated relay node [130], [131], [132], [133], [134].…”

Section: ) Receiver Cooperationmentioning

confidence: 99%

Multi-Cell MIMO Cooperative Networks: A New Look at Interference

Gesbert

Hanly

Huang³

et al. 2010

IEEE J. Select. Areas Commun.

1,612

1,228

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Abstract-This paper presents an overview of the theory and currently known techniques for multi-cell MIMO (multiple input multiple output) cooperation in wireless networks. In dense networks where interference emerges as the key capacitylimiting factor, multi-cell cooperation can dramatically improve the system performance. Remarkably, such techniques literally exploit inter-cell interference by allowing the user data to be jointly processed by several interfering base stations, thus mimicking the benefits of a large virtual MIMO array. Multicell MIMO cooperation concepts are examined from different perspectives, including an examination of the fundamental information-theoretic limits, a review of the coding and signal processing algorithmic developments, and, going beyond that, consideration of very practical issues related to scalability and system-level integration. A few promising and quite fundamental research avenues are also suggested.

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Section: ) Receiver Cooperationmentioning

confidence: 99%

Multi-Cell MIMO Cooperative Networks: A New Look at Interference

Gesbert

Hanly

Huang³

et al. 2010

IEEE J. Select. Areas Commun.

1,612

1,228

View full text Add to dashboard Cite

show abstract

“…This can be seen as the CIC may not be in strong interference while the CIRC is, and decoding both messages at the receivers of the CIC is strictly suboptimal, reducing the region of the CIC compared to the region of the CIRC. As for the IRC [8], there may be the case as well when the CIC is in strong interference and the CIRC is not, in which the use of the relay offers no benefit to the cognitive receiver.…”

Section: A Rate Region Comparisonmentioning

confidence: 99%

On the capacity of the cognitive interference channel with a relay

Águila

Imran

Tafazolli

2014

2014 IEEE Wireless Communications and Networking Conference (WCNC)

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Abstract-Interference forwarding has been shown to be beneficial in the interference channel with a relay as it enlarges the strong interference region, allowing the decoding of the interference at the receivers for larger ranges of the channel gains. In this work we demonstrate the benefit of adding a relay to the cognitive interference channel. We pay special attention to the effect of interference forwarding in this configuration. Two setups are presented. In the first, the interference forwarded by the relay is the primary user's signal, and in the second, this is the cognitive user's signal. We characterise the capacity regions of these two models in the case of strong interference. We show that as opposed to the first setup, in the second setup the capacity region is enlarged, compared to the capacity region of the cognitive interference channel, when the relay does not help the intended receiver.

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“…Interference channel (IC), which consists of two source-destination pairs, is the simplest model that characterizes the effect of interference in a wireless network. To mitigate the effect of interference, recent efforts [1]- [8] considered using a relay in the interference channel, which is termed as interference relay channel (IFRC), and obtained some interesting results. References [1] proposed an interference forwarding approach and showed the benefit of decoding interference.…”

Section: Introductionmentioning

confidence: 99%

“…To mitigate the effect of interference, recent efforts [1]- [8] considered using a relay in the interference channel, which is termed as interference relay channel (IFRC), and obtained some interesting results. References [1] proposed an interference forwarding approach and showed the benefit of decoding interference. References [3], [5], [8] proposed decode-andforward (DF) and compress-and-forward (CF) based signal relaying scheme to combat interference.…”

Section: Introductionmentioning

confidence: 99%

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Harnessing Interference with an Out-of-Band Relay: An Approximate Capacity Result

Tian

Yener

2011

2011 IEEE International Conference on Communications (ICC)

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Abstract-This work studies the Gaussian interference channel (IC) with an out-of-band relay (OBR) from an informationtheoretical perspective. The relay works in bands orthogonal to the IC. The focus is on a symmetric channel model, in order to understand the fundamental impact of the OBR on the signal interaction of the IC, in the simplest possible setting. We classify the interference links as extremely strong, very strong, strong, moderate, weak, and very weak. We find that interference is useful to improve the achievable rates when it is extremely strong or very strong. Specifically, when interference is extremely strong, the channel acts as if there are two disjoint OBRs helping each source-destination pair. For strong interference, separate encoding, i.e., transmitting independent messages thorough the IC and OBR, is optimal, while for moderate interference, separate encoding is close to optimal. For weak or very weak interference, we show that the OBR can help improve the rates for common messages and further reduce the interference. It is shown that our strategy achieves the symmetric capacity to within 1.14625 bits per channel use for all channel parameters.

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On the capacity of the interference channel with a relay

Cited by 81 publications

References 12 publications

Multi-Cell MIMO Cooperative Networks: A New Look at Interference

Multi-Cell MIMO Cooperative Networks: A New Look at Interference

On the capacity of the cognitive interference channel with a relay

Harnessing Interference with an Out-of-Band Relay: An Approximate Capacity Result

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