Cooperative CDD Scheme Based on Hierarchical Modulation in OFDM System

In order to achieve high data rate and increase the spectral efficiency, multiple input multiple output (MIMO) system has been proposed. However, multiple antennas are limited by size and cost. Therefore, recently developed cooperative diversity scheme, which profits the transmit diversity only with the existing hardware by constituting a virtual antenna array, can be a solution. However, most of the introduced cooperative techniques have a common fault of decreased transmission rate because the destination should receive the decodable compositions of symbols from the source and the relay. In this paper, we propose a cooperative cyclic delay diversity (CDD) scheme that use hierarchical modulation. This scheme is free from the rate loss and allows seamless cooperative communication.

Authors:

• Seung-Jun Yu
• Yeong-Seop Ahn
• Young-Min Ko
• Hyoung-Kyu Song

Keywords:

• MIMO
• Cooperative communication
• CDD
• Hierarchical modulation.

References:

[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] J.-H. Song, J.-H. Kim and H.-K. Song, Space-time cyclic delay diversity
encoded cooperative transmissions for multiple relays, IEICE Trans.
Commun, vol. E92-B, no. 6, pp. 2320-2323, June 2009.
[6] E.-H. Lee and H.-K. Song, An improved transmission rate in cooperative
communication based on OFDMA system, IEICE Trans. Commun., vol.
E96-A, no. 7, pp. 1667-1670, July 2013.
[7] 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.
[8] S. M. Alamouti, A simple transmitter diversity scheme for wireless
communications, IEEE Trans. Wireless Commun., vol. 16, no. 8, pp.
1451--1458, Oct. 1998.
[9] 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.
[10] ETSI, EN 301 958, V1.1.1, Digital video broadcasting (DVB): Interaction
channel for digital terrestrial television (RCT) incorporating multiple
access OFDM, March 2002.