Zhong-peng Wang,Shao-zhong Zhang.Grouped DCT precoding for PAPR reduction in optical direct detection OFDM systems[J].Optoelectronics Letters,2013,9(3):213-216 Grouped DCT precoding for PAPR reduction in optical direct detection OFDM systems Author Name Affiliation E-mail Zhong-peng Wang  School of Information and Electronic Engineering, Zhejiang University of Science and Technology, Hangzhou, 310023, China State Key Laboratory of Millimeter Waves, Southeast University, Nanjing, 210096, China Faculty of Electronic and Information Engineering, Zhejiang Wanli University, Ningbo, 315100, China  wzp1966@sohu.com  Shao-zhong Zhang  School of Information and Electronic Engineering, Zhejiang University of Science and Technology, Hangzhou, 310023, China State Key Laboratory of Millimeter Waves, Southeast University, Nanjing, 210096, China Faculty of Electronic and Information Engineering, Zhejiang Wanli University, Ningbo, 315100, China    Abstract:       A new grouped precoding technique based on discrete cosine transform (DCT) is presented for peak to average power ratio (PAPR) reduction of optical intensity modulated/direct detection (IM/DD) orthogonal frequency division multiplexing (OFDM) system. The computational complexity of the scheme is reduced by at least about 15% compared with that of the ordinary DCT precoding scheme when the number of groups is 2. The PAPR with this method can be reduced by about 0.8 dB. Meantime, compared with original OFDM, the bit error rate (BER) performance of system is improved. So the proposed scheme for reducing PAPR is very effective in optical IM/DD OFDM systems. Hits: 4047 Download times: 92 View Full Text    Download reader