Diversity order analysis of the decode-and-forward cooperative networks with relay selection

In this paper, we focus on the diversity order of the decode-and-forward (DF) cooperative networks with relay selection. Many detection schemes have been proposed for the DF; but it has been shown that the cooperative maximum ratio combining (C-MRC) can achieve almost the same performance as the optimum maximum likelihood detector and has a much lower complexity. Therefore, we first combine the C-MRC with the relay selection and show that it achieves the full diversity order by deriving an upper bound of its average bit error rate (BER). In order to reduce the signaling overhead, we then combine the link-adaptive regeneration (LAR) with the relay selection. By deriving an upper bound of the average BER, we show that, when there are two relays, the diversity order of the LAR with relay selection is upper-bounded by three and lower-bounded by 3 - epsiv, where xi is an arbitrarily small positive number.

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

[2]  Armin Wittneben,et al.  Impact of relay gain allocation on the performance of cooperative diversity networks , 2004, IEEE 60th Vehicular Technology Conference, 2004. VTC2004-Fall. 2004.

[3]  Georgios B. Giannakis,et al.  High-Performance Cooperative Demodulation With Decode-and-Forward Relays , 2007, IEEE Transactions on Communications.

[4]  Milton Abramowitz,et al.  Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables , 1964 .

[5]  Mostafa Kaveh,et al.  Exact symbol error probability of a Cooperative network in a Rayleigh-fading environment , 2004, IEEE Transactions on Wireless Communications.

[6]  Aggelos Bletsas,et al.  A simple Cooperative diversity method based on network path selection , 2005, IEEE Journal on Selected Areas in Communications.

[7]  Il-Min Kim,et al.  Joint Optimization of Relay-Precoders and Decoders with Partial Channel Side Information in Cooperative Networks , 2006, MILCOM 2006 - 2006 IEEE Military Communications conference.

[8]  Elza Erkip,et al.  User cooperation diversity. Part II. Implementation aspects and performance analysis , 2003, IEEE Trans. Commun..

[9]  Georgios B. Giannakis,et al.  Smart regenerative relays for link-adaptive cooperative communications , 2006, IEEE Transactions on Communications.

[10]  Gregory W. Wornell,et al.  Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks , 2003, IEEE Trans. Inf. Theory.

[11]  G. Fettweis,et al.  A simple cooperative extension to wireless relaying , 2004, International Zurich Seminar on Communications, 2004.

[12]  Gerhard Fettweis,et al.  On the performance of cooperative diversity protocols in practical wireless systems , 2003, 2003 IEEE 58th Vehicular Technology Conference. VTC 2003-Fall (IEEE Cat. No.03CH37484).

[13]  E. T..  An Introduction to the Theory of Numbers , 1946, Nature.

[14]  Raviraj S. Adve,et al.  Improving amplify-and-forward relay networks: optimal power allocation versus selection , 2006, IEEE Transactions on Wireless Communications.

[15]  G.B. Giannakis,et al.  Efficient Demodulation in Cooperative Schemes Using Decode-and-Forward Relays , 2005, Conference Record of the Thirty-Ninth Asilomar Conference onSignals, Systems and Computers, 2005..

[16]  Raviraj S. Adve,et al.  Symbol error rate of selection amplify-and-forward relay systems , 2006, IEEE Communications Letters.

[17]  Elza Erkip,et al.  User cooperation diversity. Part I. System description , 2003, IEEE Trans. Commun..

[18]  J. Nicholas Laneman,et al.  Modulation and demodulation for cooperative diversity in wireless systems , 2006, IEEE Transactions on Wireless Communications.

[19]  Godfrey H. Hardy,et al.  An introduction to the theory of numbers (5. ed.) , 1995 .

[20]  R. Adve,et al.  On Selection Cooperation in Distributed Networks , 2006, 2006 40th Annual Conference on Information Sciences and Systems.