Journal ArticleDOI
High SNR Error Analysis for Bidirectional Relaying With Physical Layer Network Coding
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TLDR
A large class of bidirectional relaying scenarios with physical layer network coding, and analytically characterize the relay's error performance in decoding the network-coded combination at high signal-to-noise ratio (SNR).Abstract:
We consider a large class of bidirectional relaying scenarios with physical layer network coding, and analytically characterize the relay's error performance in decoding the network-coded combination at high signal-to-noise ratio (SNR). Our analysis applies to scenarios with 1) binary or higher order real/complex modulation, 2) real or complex channel coefficients, and 3) linear or non-linear network maps for network coding at the relay. We consider block fading and allow the relay to choose from a set of network maps based on the channel coefficients of the source to relay links in every block. We derive expressions for pairwise error probability and approximate expected overall error probability. We also derive lower bounds for these error probabilities. We validate these expressions using simulations and show that our approximations are tight in the high SNR regime.read more
Citations
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Journal ArticleDOI
On MIMO Linear Physical-Layer Network Coding: Full-Rate Full-Diversity Design and Optimization
TL;DR: A space–time (ST) coded multiple-input multiple-output (MIMO) linear physical-layer network coding (LPNC) scheme that promises full-rate and full-diversity, while achieving the maximum coding gain of LPNC is proposed.
Journal ArticleDOI
User-Antenna Selection for Physical-Layer Network Coding Based on Euclidean Distance
TL;DR: The error performance analysis of a multiple-input multiple-output (MIMO) physical-layer network coding (PNC) system with two different user-antenna selection (AS) schemes in asymmetric channel conditions is presented and a Euclidean distance (ED) based user-Antenna selection scheme (AS2) that outperforms the first scheme in terms of error performance is proposed.
Journal ArticleDOI
Design and Analysis of Hierarchical Physical Layer Network Coding
Haoyuan Zhang,Lei Zheng,Lin Cai +2 more
TL;DR: This paper proposes a new relaying technique, hierarchical physical layer network coding (H-PNC), aimed at increasing the spectrum and energy efficiency in multi-hop wireless networks by supporting two bi-directional traffic flows simultaneously.
Journal ArticleDOI
Low-Complexity Estimation for Spatially Modulated Physical-Layer Network Coding Systems
TL;DR: Performance evaluations show that the proposed estimator can achieve near-optimal error performance while requiring significantly less computational complexity compared with the maximum-likelihood detector, particularly with high-order modulation.
Dissertation
Physical layer network coding based communication systems in frequency selective channels
TL;DR: The problem of frequency selective channels in PLNC systems can be solved by properly adjusting the design of the system incl uding the DFE, and an AF DFE system is proposed in this work that provides very low comple xity especially at the relay with little sensitivity to channel changes.
References
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Proceedings ArticleDOI
Hot topic: physical-layer network coding
TL;DR: This paper proposes a physical-layer network coding (PNC) scheme to coordinate transmissions among nodes that makes use of the additive nature of simultaneously arriving electromagnetic (EM) waves for equivalent coding operation and demonstrates its potential for boosting network capacity.
Journal ArticleDOI
Compute-and-Forward: Harnessing Interference Through Structured Codes
Bobak Nazer,Michael Gastpar +1 more
TL;DR: In this article, the authors proposed a new strategy, compute-and-forward, that exploits interference to obtain significantly higher rates between users in a network by decoding linear functions of transmitted messages according to their observed channel coefficients rather than ignoring the interference as noise.
Journal ArticleDOI
Optimized constellations for two-way wireless relaying with physical network coding
TL;DR: The proposed modulation scheme can significantly improve end-to-end throughput for two-way relaying systems and is applicable to a relaying system using higher-level modulations of 16QAM in the MA stage.
Posted Content
Joint Physical Layer Coding and Network Coding for Bi-Directional Relaying
TL;DR: A communication system where two transmitters wish to exchange information through a central relay is considered, using lattice codes and lattice decoding, to obtain a rate of 1/2 log(1/2 + snr) bits per transmitter, which is essentially optimal at high SNR.
Journal ArticleDOI
Joint Physical Layer Coding and Network Coding for Bidirectional Relaying
TL;DR: In this article, the authors considered a communication system where two transmitters wish to exchange information through a central relay, and they showed that using lattice codes and lattice decoding, they can obtain a rate of 1/2 log(1/2 + snr) bits per transmitter, which is essentially optimal at high SNR.
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