Generalized PIC Detector for Distributed STBC under Quasi-Synchronization

Mohammed Taha O. El Astal, Ammar M. Abu-Hudrouss

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DOI: 10.4236/wet.2012.31004                

Abstract

In this paper, we propose a Generalized Parallel Interference Cancelation (G-PIC) approach for the detection of D-STBC under Quasi-Synchronization in the case of any number of relay nodes with just statistical information about time misalignment. While as, most researches assume perfect synchronization between the relay nodes for the detection of D-STBC which is hard to achieve. This approach proved to be very effective to mitigate the degradation in the system performance due to the imperfect synchronization. The numerical simulations, for the proposed approach, showed that in just three iterations we can achieve performance close to the D-STBC with perfect synchronization.

Keywords

Distributed Space Time Block Coding; Synchronization; Distributed Transmit Diversity; Cooperative Diversity.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	X. Li, “Space-Time Coded Multi-Transmission among Distributed Transmitters without Perfect Synchronisation,” IEEE Signal Processing Letter, Vol. 11, No. 12, 2004, pp. 948-951. doi:10.1109/LSP.2004.838213
[2]	F.-C. Zheng, A. G. Burr and S. Olafsson, “Distributed Space-Time Block Coding for 3 and 4 Relay Nodes: Imperfect Synchronisation and a Solution,” IEEE 18th International Symposium on Personal, Indoor and Mobile, Radio Communications, Athens, 3-7 September 2007 pp. 1-5.
[3]	F.-C. Zheng, A.G. Burr and S. Olafsson, “Near-Optimum Detection for Distributed Space-Time Block Coding under Imperfect Synchronisation,” IEEE Transactions on Communications, Vol. 56, No. 11, 2008, pp. 1795-1799. doi:10.1109/TCOMM.2008.070006
[4]	F. Ng and X. H. Li., “Cooperative STBC-OFDM Transmission with Imperfect Synchronization in Time and Frequency,” 39th Asilomar Conference on Signals, Systems and Computers, Pacific Grove, 28 October 2005 - 1 November 2005, pp. 524-528.
[5]	Z. Zhong, S. Zhu and A. Nallanathan, “Delay-Tolerant Distributed Linear Convolutional Space-Time Code with Minimum Memory Length under Frequency-Selective Channels,” IEEE Transactions on Wireless Communications, Vol. 8, No. 8, 2009, pp. 3944-3949. doi:10.1109/TWC.2009.081181
[6]	J. N. Laneman, D. N. C. Tse and G. W. Wornell, “Cooperative Diversity in Wireless Networks: Efficient Protocols and Outage Behaviour,” IEEE Transactions on Information Theory, Vol. 50, No. 12, 2004, pp. 3062-3080. doi:10.1109/TIT.2004.838089
[7]	W. F. Su, X.-G. Xia and K. J. R. Liu, “A Systematic Design of High Rate Complex Orthogonal Space-Time Block Codes,” IEEE Communications Letters, Vol. 8, No. 6, 2004, pp. 380-382. doi:10.1109/LCOMM.2004.827429
[8]	Y. Jia, C. Andrieu, R. J. Piechocki and M. Sandell, “Gaussian Approximation Based Mixture Reduction for near Optimum Detection in MIMO Systems,” IEEE Communications Letters, Vol. 9, No. 11, 2005, pp. 997-999. doi:10.1109/LCOMM.2005.11018
[9]	S. Wei, D. L. Goeckel and M. Valenti, “Asynchronous Cooperative Diversity,” IEEE Transactions on Wireless Communications, Vol. 5, No. 6, 2006, pp. 1547-1557. doi:10.1109/TWC.2006.1638675