Overlapped Segmental Clipping for the PAPR Reduction of the OFDM-OQAM system

• Jianping Wang,
• Jing Yan,
• Zhen He,

Vol. 8, No. 8, August 28, 2014
10.3837/tiis.2014.08.012, Download Paper (Free):

• OFDM-OQAM
• peak-to-average power ratio
• clipping
• overlapped segment

Abstract

Orthogonal frequency division multiplexing with offset quadrature amplitude modulation (OFDM-OQAM) technique has drawn significant interests in recent years. However, most of the existing OFDM peak-to-average ratio (PAPR) reduction schemes cannot be used in the OFDM-OQAM system directly. In this paper, a modified scheme called overlapped segmental clipping (OS-clipping) is proposed to deal with the high PAPR problem specifically in the OFDM-OQAM system. For the proposed OS-clipping scheme, the input signals are divided into a number of overlapped segments and then the clipping operation is processed on each segment. Simulation results show that the modified scheme used in the OFDM-OQAM system can provide better performance than conventional clipping scheme directly used in the OFDM-OQAM system, and even outperforms conventional clipping scheme applied in the OFDM system.

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