In this paper, we propose a novel method to reduce the high peak-to-average power ratio (PAPR) of the optical orthogonal frequency division multiplexing (OFDM) signal. The method is based on the technique of the Hadamard transform combined with a companding transform. We experimentally demonstrate that, in an optical intensity-modulation direct-detection OFDM transmission system, the hybrid method has better performance in reducing the PAPR compared with the case of applying only the Hadamard transform or only a companding transform.
© 2012 OSA
Original Manuscript: January 4, 2012
Revised Manuscript: July 14, 2012
Manuscript Accepted: July 26, 2012
Published: September 4, 2012
Jiangnan Xiao, Jianjun Yu, Xinying Li, Qi Tang, Hongxian Chen, Fan Li, Zizheng Cao, and Lin Chen, "Hadamard Transform Combined With Companding Transform Technique for PAPR Reduction in an Optical Direct-Detection OFDM System," J. Opt. Commun. Netw. 4, 709-714 (2012)