Decode-and-cancel for interference cancellation in a three-node full-duplex network

Bai, Jingwen; Sabharwal, Ashutosh

doi:10.1109/acssc.2012.6489231

Cited by 19 publications

(18 citation statements)

References 7 publications

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“…4 Notice that our definition deviates slightly from the conventional definition of GDoF in that we account for the asymmetric bandwidths of different links and the rate is calculated as bit/s instead of bit/s/Hz. 5 The effective input is a product of the unitary matrices by SVD and the initial input vector. 6 The DMT of MAC channel with CSIT is different from that without CSIT as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…6, the base station Tx B sends N dl independent streams to downlink node Rx D , which is indicated by the black circles. Uplink node Tx U sets (1 − W )m I effective inputs 5 to zero, which is indicated by the white circles; Tx U then sends (M ul −N dl ) + -independent private streams in the null space of the signal from Tx B and Wm I common message which can be heard at Rx D . Using vector bin-and-cancel, each transmitter sends Wm I streams of its common message to the interfering receiver through the side channel, which is indicated by the blue circles.…”

Section: Theorem 3 (Case B) When Bs Has More Antennas Thanmentioning

confidence: 99%

“…The conventional use of D2D involves establishing peer-to-peer communication [2], forming virtual MIMO by cooperative communication [3] or offloading cellular traffic [4]. In contrast, we propose to use the D2D side channel for interference management to improve the cellular capacity, *Correspondence: jingwen.bai@intel.com Department of Electrical and Computer Engineering, Rice University, Houston, USA a scenario which we labeled as ISM-in-cellular communication [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Vector bin-and-cancel for MIMO distributed full-duplex

Bai

Sabharwal

2017

J Wireless Com Network

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In a multi-input multi-output (MIMO) full-duplex network, where an in-band full-duplex infrastructure node communicates with two half-duplex mobiles supporting simultaneous up-and downlink flows, the inter-mobile interference between the up-and downlink mobiles limits the system performance. We study the impact of leveraging an out-of-band side channel between mobiles in such network under different channel models. For time-invariant channels, we aim to characterize the generalized degrees-of-freedom (GDoF) of the side-channel-assisted MIMO full-duplex network. For slow-fading channels, we focus on the diversity-multiplexing tradeoff (DMT) of the system with various assumptions as to the availability of channel state information at the transmitter (CSIT). The key to the optimal performance is a vector bin-and-cancel strategy leveraging Han-Kobayashi message splitting, which is shown to achieve the system capacity region to within a constant bit. We quantify how the side channel improve the GDoF and DMT compared to a system without the extra orthogonal spectrum. The insights gained from our analysis reveal (i) the tradeoff between spatial resources from multiple antennas at different nodes and spectral resources of the side channel and (ii) the interplay between the channel uncertainty at the transmitter and use of the side channel.

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Section: Resultsmentioning

confidence: 99%

Section: Theorem 3 (Case B) When Bs Has More Antennas Thanmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Vector bin-and-cancel for MIMO distributed full-duplex

Bai

Sabharwal

2017

J Wireless Com Network

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“…We find that up to a distance of 50 meters, we can obtain an average received power greater than −80 dBm. 2 Combining with highway traffic data accessible in California, we derive an estimate on the probability of establishing ISM side-channels on highways during rush hour. We find that during rush hour, there is a 69% chance for an ISM side-channel to exist within 50 meters on highways with reliable link quality.…”

Section: Wifimentioning

confidence: 99%

Increasing cellular capacity using ISM band side-channels

Bai

Liu

Sabharwal

2014

Proceedings of the 4th Workshop on All Things Cellular: Operations, Applications, &Amp; Challenges

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The rise of ISM band radios, notably for WiFi, with neardefault inclusion in smartphones, has been phenomenal. The use of ISM band radios is largely controlled by end-users for data access, either directly connecting to a WiFi access point or wireless tethering. We study an additional use of ISM bands to manage interference in cellular bands, by creating ISM "side-channels" between mobile clients. Our objective is to increase the network capacity in cellular bands, when there is no opportunity of data offloading to WiFi. We first study the likelihood of finding a WiFi-free environment, specifically on highways, to establish an ISM sidechannel between smartphones. The likelihood is found by experimentally studying the range of WiFi links between smartphones with our designed Android applications, combined with rush hour traffic data on highways; the result is that there is high probability of finding at least one smartphone within the ISM band range. Finally, we show that the proposed use of ISM side-channels can significantly reduce interference in a MIMO wireless system and increase the overall cellular network capacity, by flexibly accommodating both multiuser beam-forming and full-duplex operation.

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“…Another approach is to cancel interference via baseband processing techniques, e.g., using sophisticated transmit and receive filters (see [7], [11]- [13]). More recently, multi-user interference cancellation schemes have been proposed in, e.g., [14], [15].…”

Section: Introductionmentioning

confidence: 99%

Full-duplex in large-scale wireless systems

Yin

Studer

et al. 2013

2013 Asilomar Conference on Signals, Systems and Computers

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In this paper, we investigate the combination of fullduplex wireless communication with large-scale multiple-input multiple-output (MIMO) technology, which has the potential for bidirectional wireless communication at high spectral efficiency and low power consumption. In addition, we study its application to cellular (multi-user) systems that could be extended with large antenna arrays, such as 3GPP LTE. In order to solve the fundamental issue of self-interference cancellation in fullduplex cellular communication systems, we propose two schemes that exploit the excess of antennas present at the base-station (BS) of large-scale MIMO systems. We investigate the associated sum-rate and show that by carefully selecting the ratio between number of transmit and receive antennas at the BS, one is able to maximize the system capacity. We furthermore investigate the inter-user interference issue that occurs in multi-user scenarios, as well as the impact of residual transmit-side (TX) radiofrequency (RF) impairments. Our preliminary results show that large-scale MIMO is able to render full-duplex communication more resilient against inter-user interference and helps to mitigate the effects of residual TX-RF impairments.

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Decode-and-cancel for interference cancellation in a three-node full-duplex network

Cited by 19 publications

References 7 publications

Vector bin-and-cancel for MIMO distributed full-duplex

Vector bin-and-cancel for MIMO distributed full-duplex

Increasing cellular capacity using ISM band side-channels

Full-duplex in large-scale wireless systems

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