Superimposed XOR: A New Physical Layer Network Coding Scheme for Two-Way Relay Channels

Liu, Jianquan; Tao, Meixia; Xu, Youyun; Wang, Xiaodong

doi:10.1109/glocom.2009.5426240

Cited by 46 publications

(20 citation statements)

References 15 publications

(10 reference statements)

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“…Ref. [39] investigated a system in which the relay explicitly decodes 1 S and 2 S in the uplink phase, but uses a combination of XOR and superposition coding for the downlink broadcast case. The focus is on how to deal with asymmetric channels to nodes and 2.…”

Section: Channel-coded Pncmentioning

confidence: 99%

Physical-layer network coding: Tutorial, survey, and beyond

Liew

Zhang

2013

Physical Communication

297

261

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The concept of physical-layer network coding (PNC) was proposed in 2006 for application in wireless networks. Since then it has developed into a subfield of network coding with wide followings. The basic idea of PNC is to exploit the network coding operation that occurs naturally when electromagnetic (EM) waves are superimposed on one another. This simple idea turns out to have profound and fundamental ramifications. Subsequent works by various researchers have led to many new results in the domains of 1) wireless communication; 2) wireless information theory; and 3) wireless networking. The purpose of this paper is fourfold. First, we give a brief tutorial on the basic concept of PNC. Second, we survey and discuss recent key results in the three aforementioned areas. Third, we examine a critical issue in PNC: synchronization. It has been a common belief that PNC requires tight synchronization. Our recent results suggest, however, that PNC may actually benefit from asynchrony. Fourth, we propose that PNC is not just for wireless networks; it can also be useful in optical networks. We provide an example showing that the throughput of a passive optical network (PON) could potentially be raised by 100% with PNC.

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Section: Channel-coded Pncmentioning

confidence: 99%

Physical-layer network coding: Tutorial, survey, and beyond

Liew

Zhang

2013

Physical Communication

297

261

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“…Apart from decode-and forward relaying strategy, there exist several other strategies for bidirectional relaying which perform a different processing at the relay node. First works mostly consider amplify-and-forward strategies [12,23,25,[27][28][29] or decodeand-forward strategies [12,[30][31][32][33]. Other schemes are compress-and-forward [34,35] or compute-and-forward [36][37][38][39][40] approaches, where the relay decodes a certain function of both individual messages.…”

Section: Decode and Forward Bidirectional Relayingmentioning

confidence: 99%

Bidirectional relay communication with additional private message

Schaefer

Boche

2013

2013 IEEE 14th Workshop on Signal Processing Advances in Wireless Communications (SPAWC)

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Recent research developments show that the concept of bidirectional relaying significantly improves the performance and coverage in wireless networks. Further, the efficient implementation of multiple services at the physical layer has been identified as a promising research direction. In this thesis we consider physical layer service integration in bidirectional relay networks, in which a relay node establishes a bidirectional communication between two other nodes using a decode-and-forward protocol. In the broadcast phase the relay efficiently integrates an additional private message for one node which requires the study of the bidirectional broadcast channel with additional private message. The corresponding capacity regions for discrete memoryless, Gaussian and multi-antenna Gaussian channels are derived. Finally, we study the case of the MISO Gaussian channel, where the receiving nodes have only one antenna. For this case, the boundaries of the corresponding capacity region are characterized by a convex optimization problem. We represent them graphically and compare them with the TDMA approach. i AcknowledgmentsThe last two years in

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“…More specifically, RNs can be efficiently exploited under a hierarchical dual-hop system architecture, entailing that mobile stations (MSs) are served indirectly by a hub base station (HBS) via a dense network of fixed RNs [3]- [6]. High spectral efficiencies in such hierarchical network can be attained by full-duplex RNs which are hard to implement [7], or alternatively by half-duplex RNs that exploit the properties of two-way relay channels (2WRCs), a technique that has recently attracted a lot of attention [8]- [15]. This structure can effectively be considered in terms of a series of interfering two-way RNs.…”

Section: Introductionmentioning

confidence: 99%

On the Maximum Achievable Sum-Rate of Interfering Two-Way Relay Channels

2012

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Abstract-Hierarchical networks can provide very high data rates to multiple mobile stations (MSs) through a dense network of fixed relay nodes (RNs) fed by few hub base stations (HBSs). In order to achieve high spectral efficiencies RNs can act as twoway RNs. However the dense RN deployment gives rise to high co-channel interference (CCI) that limits sum-rate performance. In this letter we consider a simple hierarchical network consisting of an HBS with two highly directional antennas communicating with two MSs via two interfering two-way RNs. To mitigate CCI and boost sum-rates we propose a two-way relaying strategy based on AF combined with Network MIMO processing which is applied over the concatenation of the backhaul and access network channels. We compare our proposed strategy with a baseline DF approach and we show that it performs significantly better when CCI is dominant.Index Terms-Two-way relay channels (2WRCs), amplify-andforward (AF), network coding (NC), Network MIMO, CoMP.

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Superimposed XOR: A New Physical Layer Network Coding Scheme for Two-Way Relay Channels

Cited by 46 publications

References 15 publications

Physical-layer network coding: Tutorial, survey, and beyond

Physical-layer network coding: Tutorial, survey, and beyond

Bidirectional relay communication with additional private message

On the Maximum Achievable Sum-Rate of Interfering Two-Way Relay Channels

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