Two-User Cooperative Transmission Using Superposition Modulation and Soft Information Combining

We propose a cooperative transmission scheme for two users with one common relay using superposition modulation. It uses distributed Turbo codes (DTCs) for each user. The relay always decodes, then interleaves and re-encodes the decoded data. A new packet is formed by combining the re-encoded packets from both users using superposition modulation. This packet is forwarded to the destination with the average receive SNRs of each user. The destination uses cooperative Turbo decoders to improve performance. Simulation results show the proposed scheme outperforms XOR based schemes and is simple to implement.

[1]  Tiffany Jing Li,et al.  Adaptive network coded cooperation (ANCC) for wireless relay networks: matching code-on-graph with network-on-graph , 2008, IEEE Transactions on Wireless Communications.

[2]  Jinhong Yuan,et al.  Iterative approaches of cooperative transmission based on superposition modulation , 2007, 2007 International Symposium on Communications and Information Technologies.

[3]  Zhu Han,et al.  High performance cooperative transmission protocols based on multiuser detection and network coding , 2009, IEEE Transactions on Wireless Communications.

[4]  Branka Vucetic,et al.  Distributed Turbo Coding With Soft Information Relaying in Multihop Relay Networks , 2006, IEEE Journal on Selected Areas in Communications.

[5]  Erik G. Larsson,et al.  Cooperative transmit diversity based on superposition modulation , 2005, IEEE Communications Letters.

[6]  Jinkang Zhu,et al.  A Novel Network-Coding-Based Coded Cooperation Scheme , 2009, 2009 IEEE Wireless Communications and Networking Conference.

[7]  J. Nicholas Laneman,et al.  Cooperative diversity in wireless networks: algorithms and architectures , 2002 .

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

[9]  Sachin Katti,et al.  The Importance of Being Opportunistic: Practical Network Coding for Wireless Environments , 2005 .

[10]  Suhua Tang,et al.  Turbo network coding for efficient and reliable relay , 2008, 2008 11th IEEE Singapore International Conference on Communication Systems.

[11]  Tiffany Jing Li,et al.  Efficient Message Relaying for Wireless User Cooperation: Decode-Amplify-Forward (DAF) and Hybrid DAF and Coded-Cooperation , 2007, IEEE Transactions on Wireless Communications.

[12]  Koji Ishii.  Coded Cooperation Protocol Utilizing Superposition Modulation for Half-Duplex Scenario , 2007, 2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications.

[13]  Desmond P. Taylor,et al.  Cooperative Signaling with Soft Information Combining , 2010, J. Electr. Comput. Eng..

[14]  Jörg Kliewer,et al.  A network coding approach to cooperative diversity , 2007, IEEE Transactions on Information Theory.

[15]  Georgios B. Giannakis,et al.  Complex Field Network Coding for Multiuser Cooperative Communications , 2008, IEEE Journal on Selected Areas in Communications.