Cooperative CDD Scheme Based On Adaptive Modulation in Wireless Communication System

Among spatial diversity scheme, orthogonal space-time block code (OSTBC) and cyclic delay diversity (CDD) have been widely studied for the cooperative wireless relaying system. However, conventional OSTBC and CDD cannot cope with change in the number of relays owing to low throughput or error performance. In this paper, we propose a cooperative cyclic delay diversity (CDD) scheme that use hierarchical modulation at the source and adaptive modulation based on cyclic redundancy check (CRC) code at the relays.

• Seung-Jun Yu
• Hwan-Jun Choi
• Hyoung-Kyu Song

• Adaptive modulation
• Cooperative communication
• CDD
• OSTBC.

[1] H. Sampath, S. Talwar, J. Tellado, V. Erceg and A. Paulraj, A fourth-generation MIMO-OFDM broadband wireless system: design, performance, and field trial results, IEEE Commun. Mag., vol. 40, no. 9, pp. 143-149, Sep. 2002.
[2] J.-H. Kim and H.-K. Song, Performance improvement of cooperative MB-OFDM system based coming home network, IEEE Trans. Consum. Electron., vol.53, no.2, pp.442-447, May 2007.
[3] A. Sendonaris, E. Erkip and B. Aazhang, User cooperation diversity--Part I: System description, IEEE Trans. Commun., vol. 51, no. 12, pp.1927-1938, Nov. 2003.
[4] J. N. Laneman, D. N. C. Tse and G. W. Wornell, Cooperative diversity in wireless networks: Efficient protocols and outage behavior, IEEE Trans. Info. Theory, vol. 50, no. 12, pp. 3062-3080, Dec. 2004.
[5] V. Tarokh, H. Jafarkhani and A. R. Calderbank, Space-time block codes from orthogonal designs, IEEE Trans. Inf. Theory, vol. 45, no. 5, pp. 1456-1467, July 1999.
[6] S. M. Alamouti, A simple transmitter diversity scheme for wireless communications, IEEE Trans. Wireless Commun., vol. 16, no. 8, pp. 1451--1458, Oct. 1998.
[7] A. Dammann, F. Said, M. Dohler and A. H. Aghvami, Performance comparison of space-time block coded and cyclic delay diversity MC-CDMA systems, IEEE Trans. Wireless Commun., vol. 12, no. 2, pp. 38--45, April 2005.
[8] ETSI, EN 301 958, V1.1.1, Digital video broadcasting (DVB): Interaction channel for digital terrestrial television (RCT) incorporating multiple access OFDM, Mar. 2002.