Journal Title : International Journal of Modern Trends in Engineering and Science

Author’s Name : K.Sathish, S.Barathkumar

Volume 01 Issue o3 March 2014   

ISSN no2348-3121

Page no: 39-43

 Abstract—  This paper proposes a new hybrid cyclic delay diversity (HCDD) scheme for multiple input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. Unlike the existing double space time transmit diversity (DSTTD) and stacked cyclic delay diversity (SCDD) schemes that are suitable for integer multiplexing rates, the proposed HCDD scheme can achieve arbitrary non-integer multiplexing rates. Our results demonstrate that the HCDD scheme can provide flexibility in selecting the required number of transmitting antennas and in adjusting diversity and multiplexing gains to match various users requirements. The advantages of the proposed HCDD, including the flexible rate assignment and less complex receivers, are presented in applications of scalable video broadcasting (SVB).

Keywords HCDD, OFDM, Cyclic delay


[1] L. Zheng and D. Tse, “Diversity and multiplexing: a fundamental tradeoff in multiple-antenna channels,” IEEE Trans. Inf. Theory, Vol. 49, No. 5, pp. 1073–1096, May (2003).
[2] T. Hwang, C. Yang, G. Wu, S. Li, and G. Ye Li, “OFDM and its wireless applications: a survey,” IEEE Trans. Veh. Technol., Vol. 58, No. 4, pp. 1673-1694, May (2009).
[3] Q. Li, G. Li, W. Lee, M.-I. Lee, D. Mazzarese, B. Clerckx, and Z. Li, “MIMO techniques in WiMAX and LTE: a feature overview,”IEEE Commun. Mag., Vol. 48, No. 5, pp. 86–92, May (2010).
[4] Y. Li, J. H.Winters, and N. R. Sollenberger, “MIMO-OFDM for wireless communications: signal detection with enhanced channel estimation,” IEEE Trans. Commun., Vol. 17, No. 9, pp. 1233–1477, Sep. (2002).
[5] L. Zhao and V. Dubey, “Detection schemes for space-time block code and spatial multiplexing combined system,” IEEE Commun. Lett. Vol 3, No 8, pp.49–51, (2005).
[6] M. B. Obando, W. C. Freitas Jr., and F. R. P. Cavalcanti, “Switching between hybrid MIMO structures for video transmission based on distortion model,” in Proc. 2010 IEEE Veh. Technol. Conf. – Fall.
[7] J. T. Wang, “Combined diversity and multiplexing for multiple-input multiple-output system with cochannel interference,” IET Commun. Vol.4-6, No. 10, pp. 1164–1173, 2010.
[8] Y. Lee and H.-wei Shieh, “A simple layered space-time block nulling technique for DSTTD systems,” IEEE Commun. Lett., Vol. 3, No. 8, pp. 4 (2011).
[9] A. Dammann and S. Kaiser, “Performance of low complex antenna diversity techniques for mobile OFDM systems,” in Proc. (2001) Int. Workshop Multi-Carrier Spread-Spectrum Related Topics, pp. 53-64.

Full Pdf Paper-Click Here

Scroll Up