A Novel User Grouping Scheme for PAPR Reduction in MC-CDMA System

The high peak-to-average power ratio (PAPR) is one of the main drawbacks of multicarrier code division multiple access (MC-CDMA) system. To alleviate this problem, in this paper, we propose a novel user grouping scheme for PAPR reduction in the downlink of MC-CDMA. The basic principle is to partition the users into subgroups, and generate multiple alternatives to achieve considerable PAPR reduction. The proposed scheme can be regarded as a modified version of partial transmit sequence (PTS), but with improved performance. And simulation results show that the user grouping scheme is more effective than the conventional PTS in MC-CDMA system.

[1]  Tomoaki Ohtsuki,et al.  A peak to average power ratio reduction of multicarrier CDMA using selected mapping , 2002, Proceedings IEEE 56th Vehicular Technology Conference.

[2]  Jae Hong Lee,et al.  An overview of peak-to-average power ratio reduction techniques for multicarrier transmission , 2005, IEEE Wireless Communications.

[3]  Izzat Darwazeh,et al.  Performance assessment of MC-CDMA and MC-DS-CDMA in the presence of high power amplifier non-linearities , 2002, Vehicular Technology Conference. IEEE 55th Vehicular Technology Conference. VTC Spring 2002 (Cat. No.02CH37367).

[4]  Jean-François Hélard,et al.  Multicarrier CDMA techniques for future wideband wireless networks , 2001, Ann. des Télécommunications.

[5]  Mao-Chao Lin,et al.  OFDM PAPR reduction using clipping with distortion control , 2005, IEEE International Conference on Communications, 2005. ICC 2005. 2005.

[6]  J. Huber,et al.  OFDM with reduced peak-to-average power ratio by optimum combination of partial transmit sequences , 1997 .

[7]  Tao Jiang,et al.  Complement block coding for reduction in peak-to-average power ratio of OFDM signals , 2005, IEEE Commun. Mag..

[8]  R.M.A.P. Rajatheva,et al.  An investigation of peak-to-average power ratio in MC-CDMA combined with partial transmit sequence , 2001, IEEE VTS 53rd Vehicular Technology Conference, Spring 2001. Proceedings (Cat. No.01CH37202).