Optoelectronics Letters, Volume. 9, Issue 3, 213(2013)
Grouped DCT precoding for PAPR reduction in optical direct detection OFDM systems
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.
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WANG Zhong-peng, ZHANG Shao-zhong. Grouped DCT precoding for PAPR reduction in optical direct detection OFDM systems[J]. Optoelectronics Letters, 2013, 9(3): 213
Received: Jan. 29, 2013
Accepted: --
Published Online: Oct. 12, 2017
The Author Email: Zhong-peng WANG (wzp1966@sohu.com)