Maximum-Likelihood Detectors for Full-Rate Cooperative Communication Systems

A key issue in the full-rate two-relay cooperative communication systems is the interference which is caused by the simultaneous transmission of the source and one of the relays at any time. In this paper, we exploit the interference signal at the destination to develop a maximum likelihood (ML) detector for decode and forward full-rate cooperative systems. It is shown that the Viterbi algorithm can be employed to find the ML solution. To reduce the complexity of the proposed ML detector, a sub-optimal detector is also introduced. Further, we propose a ML interference cancellation scheme at the relays. The performance of the proposed schemes is evaluated through Monte Carlo simulations. Results indicate that the proposed schemes outperform direct transmission and conventional relaying schemes in terms of their bit error rate.

[1]  Yu Gong,et al.  Full Interference Cancellation for Two-Path Cooperative Communications , 2009, 2009 IEEE Wireless Communications and Networking Conference.

[2]  Ye Li,et al.  A Full Rate Symmetrical Cooperative Relay Approach for Wireless Systems , 2008, 2008 4th IEEE International Conference on Circuits and Systems for Communications.

[3]  Armin Wittneben,et al.  Spectral efficient protocols for half-duplex fading relay channels , 2007, IEEE Journal on Selected Areas in Communications.

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

[5]  Alejandro Ribeiro,et al.  Opportunistic multipath for bandwidth-efficient cooperative multiple access , 2006, IEEE Transactions on Wireless Communications.

[6]  Jörg Kliewer,et al.  Error performance analysis of signal superposition coded cooperative diversity , 2009, IEEE Transactions on Communications.

[7]  Gregory W. Wornell,et al.  Cooperative diversity in wireless networks: Efficient protocols and outage behavior , 2004, IEEE Transactions on Information Theory.

[8]  A. Host-Madsen,et al.  Cooperative diversity for wireless ad hoc networks , 2006, IEEE Signal Processing Magazine.

[9]  H. Vincent Poor,et al.  Recovering Multiplexing Loss through Successive Relaying Using Repetition Coding , 2007, IEEE Transactions on Wireless Communications.

[10]  Aria Nosratinia,et al.  Coded cooperation in wireless communications: space-time transmission and iterative decoding , 2004, IEEE Transactions on Signal Processing.

[11]  Ioannis Krikidis.  Analysis and Optimization Issues for Superposition Modulation in Cooperative Networks , 2009, IEEE Transactions on Vehicular Technology.

[12]  Aria Nosratinia,et al.  Cooperative communication in wireless networks , 2004, IEEE Communications Magazine.

[13]  Myung J. Lee,et al.  Emerging standards for wireless mesh technology , 2006, IEEE Wireless Communications.

[14]  Desmond P. Taylor,et al.  Viterbi Decoding for Satellite and Space Communication , 2007 .

[15]  Gerhard Fettweis,et al.  A Cooperative Relaying Scheme without the Need for Modulation with Increased Spectral Efficiency , 2006, IEEE Vehicular Technology Conference.