Design of Irregular Repeat-Accumulate Coded Physical-Layer Network Coding for Gaussian Two-Way Relay Channels

This paper addresses the design of irregular repeat accumulate (IRA) codes for coded physical-layer network coding (PNC) for the binary-input Gaussian two-way relay channel, assuming perfect synchronization and equal received power at the relay. The design is based on a nontrivial extension of EXIT-...

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Veröffentlicht in:IEEE transactions on communications Jg. 61; H. 3; S. 897 - 909
Hauptverfasser: Tao Huang, Tao Yang, Jinhong Yuan, Land, I.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York, NY IEEE 01.03.2013
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Algorithms
Applied sciences
Binary phase shift keying
Channels
Coding
Computation
compute-and-forward
convergence analysis
Decoding
Downlink
Exact sciences and technology
EXIT chart
Gaussian
Iterative decoding
Network coding
Networks
Noise levels
physical-layer network coding
Relay
Relays
Repeat-Accumulate codes
Studies
Switching and signalling
Synchronism
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Two-way relay channel
Uplink
Performance evaluation
Two-way relay channel
Lower bound
physical-layer network coding
Packet switching
Relay
Repeat-accumulate code
Two channel system
Iterative method
Synchronization
Irregular code
Information transmission
EXIT chart
Optimization
Upper bound
Relay channel
convergence analysis
Computation error
Repeat-Accumulate codes
Network coding
Transfer function
compute-and-forward
ISSN:0090-6778, 1558-0857
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Beschreibung
Zusammenfassung:This paper addresses the design of irregular repeat accumulate (IRA) codes for coded physical-layer network coding (PNC) for the binary-input Gaussian two-way relay channel, assuming perfect synchronization and equal received power at the relay. The design is based on a nontrivial extension of EXIT-chart based design. Specifically, we analyze the components of the IRA-PNC scheme and propose an approach to model the soft information exchanged between these components. Then, we develop upper and lower bounds on the extrinsic information transfer functions to characterize the iterative process of computing the network-coded information. Based on that, we construct optimized IRA codes to minimize the computation error at the relay. The optimized IRA-PNC has considerable performance improvement over the existing regular RA coded PNC. For a rate 3/4 code, as an example, we observed improvements of 2.6 dB, and the optimized IRA-PNC scheme is only about 1.7 dB away from the capacity upper bound of the Gaussian two-way relay channel.
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ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2013.012313.110631