Discrete Time Rake Receiver for Cooperative DS-CDMA Systems

In this paper, we propose to use the Discrete-Time Rake receiver for Cooperative DS-CDMA systems. We compare the Bit Error Rate (BER) performance of the Continuous Time, Discrete Time and Decorrelating Discrete Time Rake receivers (CTR, DTR, DDTR) using Decode and Forward (DF) relaying. The former receiver is the most used and consists in combining the output of correlators locked on the most significant paths. The DTR consists in a matched filter to the discrete equivalent model of the global channel resulting from the convolution of the impulse response of the transmitter shaping filter and the multipath channel. The DDTR is the optimal implementation of the DTR according to maximum a posteriori criterion.

[1]  Gregory W. Wornell,et al.  Energy-efficient antenna sharing and relaying for wireless networks , 2000, 2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540).

[2]  Hatem Boujemaa.  Exact and asymptotic BEP of cooperative DS-CDMA systems using decode and forward relaying in the presence of multipath propagation , 2009, IEEE Transactions on Wireless Communications.

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

[4]  Noureddine Hamdi,et al.  Sep of cooperative systems using Amplify and Forward or Decode and Forward relaying , 2009, EUSIPCO.

[5]  Hatem Boujemaa,et al.  On a maximum likelihood delay acquisition algorithm , 2001, ICC 2001. IEEE International Conference on Communications. Conference Record (Cat. No.01CH37240).

[6]  Philippe Loubaton,et al.  On the performance of a discrete time RAKE , 2000, 11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525).

[7]  K. J. Ray Liu,et al.  Multinode Cooperative Communications in Wireless Networks , 2007, IEEE Transactions on Signal Processing.

[8]  R.L. Bogusch,et al.  Frequency selective propagation effects on spread-spectrum receiver tracking , 1981, Proceedings of the IEEE.

[9]  R. van Nee.  The Multipath Estimating Delay Lock Loop , 1992, IEEE Second International Symposium on Spread Spectrum Techniques and Applications.

[10]  Mohamed Siala,et al.  BER performance comparison of the continuous time, discrete time and decorrelating discrete time Rake receivers , 2005, 2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications.

[11]  Hatem BOUJEMAA,et al.  Récepteurs en râteau pour les systèmes à étalement de spectre par séquences directes , 2001, Ann. des Télécommunications.