Proceedings ArticleDOI
Iterative Network and Channel Decoding for the Two-Way Relay Channel
Christoph Hausl,Joachim Hagenauer +1 more
- Vol. 4, pp 1568-1573
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TLDR
A joint network-channel coding method is described for this channel model, where channel codes are used at both users and a network code is used at the relay, which forms a distributed turbo code which is called turbo network code.Abstract:
We introduce an extension of the relay channel that we call two-way relay channel. The two-way relay channel consists of two users which want to communicate to each other with the help of one relay. We consider the time-division two-way relay channel without power control, where the broadcast channels are orthogonalized in time and where the two users and the relay use the same transmission power. We describe a joint network-channel coding method for this channel model, where channel codes are used at both users and a network code is used at the relay. The channel code of one user and the network code form a distributed turbo code which we call turbo network code and which can be iteratively decoded at the other user. Moreover, we conjecture closed expressions for lower bounds for the channel capacities of the time-division relay and two-way relay channel without power control and deliver simulation results of the proposed turbo network code.read more
Citations
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Journal ArticleDOI
Wireless Network Information Flow: A Deterministic Approach
TL;DR: An exact characterization of the capacity of a network with nodes connected by deterministic channels is obtained, a natural generalization of the celebrated max-flow min-cut theorem for wired networks.
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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.
Posted Content
Physical Network Coding in Two-Way Wireless Relay Channels
Petar Popovski,Hiroyuki Yomo +1 more
TL;DR: In this paper, the authors investigated the conditions for maximization of the two-way rate for each individual scheme: (1) the Decode-and-Forward (DF) 3-step schemes, (2) three different schemes with two steps: Amplify-and--Forward (AF), JDF and Denoise--and-forward (DNF), and the most interesting result of the paper is that, for some SNR configurations of the source-relay links, JDF yields identical maximal twoway rate as the upper bound on DNF.
Proceedings ArticleDOI
Physical Network Coding in Two-Way Wireless Relay Channels
Petar Popovski,Hiroyuki Yomo +1 more
TL;DR: The most interesting result of the paper is that, for some SNR configurations of the source - relay links, JDF yields identical maximal two-way rate as the upper bound on the rate for DNF.
Journal ArticleDOI
Channel coding and decoding in a relay system operated with physical-layer network coding
Shengli Zhang,Soung Chang Liew +1 more
TL;DR: This paper redesigns the belief propagation decoding algorithm of the RA code for traditional point-to-point channel to suit the need of the PNC multiple-access channel and shows that the new scheme outperforms the previously proposed schemes significantly in terms of BER without added complexity.
References
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Journal ArticleDOI
Network information flow
TL;DR: This work reveals that it is in general not optimal to regard the information to be multicast as a "fluid" which can simply be routed or replicated, and by employing coding at the nodes, which the work refers to as network coding, bandwidth can in general be saved.
Book
WCDMA for UMTS
Harri Holma,Antti Toskala +1 more
TL;DR: In this article, the authors present the key parts of the 3GPP/WCDMA standard and provide guidelines for its efficient use and present network dimensioning and coverage and capacity planning of WCDMA.
Journal ArticleDOI
Three-terminal communication channels
TL;DR: A coding theorem and weak converse are proved and a necessary and sufficient condition for a positive capacity is derived and upper and lower bounds on the capacity are obtained, which coincide for channels with symmetric structure.
Two-way Communication Channels
TL;DR: This work wishes to determine what pairs of signalling rates R1 and R2 for the two directions can be approached with arbitrarily small error probabilities.