Soft-Information-Based Joint Network-Channel Coding for the Two-Way Relay Channel

We consider network coding for the time-division two-way relay channel (TWRC). Based on achievable rates, we study the optimal transmission time allocation for a three-phase transmission protocol. While existing network coding schemes for the TWRC perform "hard" network coding, we propose a novel soft-information-based joint network-channel coding scheme. A detailed description of the operation of each network node in our scheme is given. Moreover, we discuss optimal log-likelihood ratio quantization as well as the transmission of quantized soft information. Finally, we assess the performance of the proposed scheme using numerical simulations, including a comparison to conventional "hard" network coding and to direct transmission without relay.

[1]  Tobias J. Oechtering,et al.  Achievable Rate Region of a Two Phase Bidirectional Relay Channel , 2007, 2007 41st Annual Conference on Information Sciences and Systems.

[2]  Niklas Johansson,et al.  Coded Bi-directional Relaying , 2006, 2006 IEEE 63rd Vehicular Technology Conference.

[3]  Naftali Tishby,et al.  The information bottleneck method , 2000, ArXiv.

[4]  Petar Popovski,et al.  The Anti-Packets Can Increase the Achievable Throughput of a Wireless Multi-Hop Network , 2006, 2006 IEEE International Conference on Communications.

[5]  Soung Chang Liew,et al.  > Replace This Line with Your Paper Identification Number (double-click Here to Edit) < 1 , 2022 .

[6]  Dirk Wübben,et al.  Generalized Sum-Product Algorithm for Joint Channel Decoding and Physical-Layer Network Coding in Two-Way Relay Systems , 2010, 2010 IEEE Global Telecommunications Conference GLOBECOM 2010.

[7]  Allen Gersho,et al.  Pseudo-Gray coding , 1990, IEEE Trans. Commun..

[8]  Sachin Katti,et al.  Embracing wireless interference: analog network coding , 2007, SIGCOMM '07.

[9]  Armin Wittneben,et al.  Achievable Rate Regions for the Two-way Relay Channel , 2006, 2006 IEEE International Symposium on Information Theory.

[10]  Patrick Mitran,et al.  Performance Bounds for Bidirectional Coded Cooperation Protocols , 2007, IEEE Transactions on Information Theory.

[11]  Gerhard Bauch,et al.  Optimized symbol mappings for bit-interleaved coded modulation with iterative decoding , 2003, GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489).

[12]  Rudolf Ahlswede,et al.  Network information flow , 2000, IEEE Trans. Inf. Theory.

[13]  Gerhard Bauch,et al.  Asymmetric Data Rate Transmission in Two-Way Relaying Systems with Network Coding , 2010, 2010 IEEE International Conference on Communications.

[14]  R. Knopp.  Two-Way Radio Networks with a Star Topology , 2006, 2006 International Zurich Seminar on Communications.

[15]  Joachim Hagenauer,et al.  Iterative decoding of binary block and convolutional codes , 1996, IEEE Trans. Inf. Theory.

[16]  Dirk Wiibben.  Joint channel decoding and physical-layer network coding in two-way QPSK relay systems by a generalized Sum-Product Algorithm , 2010, ISWCS 2010.

[17]  A. Wittneben,et al.  Spectral Efficient Signaling for Half-duplex Relay Channels , 2005, Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005..

[18]  Liang-Liang Xie.  Network Coding and Random Binning for Multi-User Channels , 2007, 2007 10th Canadian Workshop on Information Theory (CWIT).

[19]  John Cocke,et al.  Optimal decoding of linear codes for minimizing symbol error rate (Corresp.) , 1974, IEEE Trans. Inf. Theory.

[20]  Gerald Matz,et al.  On efficient soft-input soft-output encoding of convolutional codes , 2011, 2011 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP).

[21]  Tomás̆ Novosad,et al.  Radio Network Planning and Optimisation for Umts , 2006 .

[22]  J. Widmer,et al.  Design of network coding functions in multihop relay networks , 2008, 2008 5th International Symposium on Turbo Codes and Related Topics.

[23]  Sichao Yang,et al.  Network Coding over a Noisy Relay : a Belief Propagation Approach , 2007, 2007 IEEE International Symposium on Information Theory.

[24]  Joachim Hagenauer,et al.  Iterative Network and Channel Decoding for the Two-Way Relay Channel , 2006, 2006 IEEE International Conference on Communications.

[25]  Sae-Young Chung,et al.  Capacity Bounds for Two-Way Relay Channels , 2008, 2008 IEEE International Zurich Seminar on Communications.

[26]  Gerald Matz,et al.  Quantization for soft-output demodulators in bit-interleaved coded modulation systems , 2009, 2009 IEEE International Symposium on Information Theory.

[27]  Petar Popovski,et al.  Bi-directional Amplification of Throughput in a Wireless Multi-Hop Network , 2006, 2006 IEEE 63rd Vehicular Technology Conference.

[28]  Stephen P. Boyd,et al.  Convex Optimization , 2004, Algorithms and Theory of Computation Handbook.