Iterative clipping and filtering based on discrete cosine transform/inverse discrete cosine transform for intensity modulator direct detection optical orthogonal frequency division multiplexing system

作者：Mangone, Fall^*; Tang, Jin; Chen, Ming; Xiao, Jiangnan; Fan, Li; Chen, Lin

来源：Optical Engineering, 2013, 52(6): 065001.

DOI：10.1117/1.OE.52.6.065001

• iterative clipping and filtering
• peak-to-power ratio
• discrete cosine transformation/inverse discrete cosine transformation
• intensity modulator and direct detection

Iterative clipping and filtering (ICF) is a useful technique to reduce the peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. However, the classical ICF with Fast Fourier Transform/Inverse Fast Fourier Transform requires much iteration to approach a specified PAPR threshold in the complementary cumulative distribution function. To reduce the nonlinear distortion in both electrical and optical devices and in the optical fiber, we propose a novel ICF based on discrete cosine transform/inverse discrete cosine transform to reduce the PAPR in an intensity modulator and direct detection (IM/DD) optical OFDM system. Furthermore, the new technique considerably improves bit error rate (BER) and reduces the PAPR with just few iterations. The experimental results show that the receiver sensitivity at a BER of 1 x 10(-3) for a 2.5-Gbytes/s OFDM signal and after 200-km standard single-mode fiber transmission has been improved by 1.1, 2.3, and 3.6 dBm with launch powers of 6, 8, and 12 dBm respectively.

• 出版日期2013-6
• 单位湖南大学