A PAPR reduction technique using Hadamard transform combined with clipping and filtering based on DCT/IDCT for IM/DD optical OFDM systems |
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| Affiliation: | 1. Yonsei Institute of Convergence Technology, Yonsei University, Incheon 406-840, Republic of Korea;2. The Department of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, Republic of Korea;1. Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China;2. College of Information Science and Engineering, Hunan Normal University, Changsha, Hunan 410080, China;3. Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai 519000, China |
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| Abstract: | In Intensity Modulator/Direct Detection (IM/DD) optical OFDM systems, the high peak-to-power average ratio (PAPR) will cause signal impairments through the nonlinearity of modulator and fiber. In this paper, a joint PAPR reduction technique based on Hadamard transformation and clipping and filtering using DCT/IDCT transform has been proposed for mitigating the impairments in IM/DD optical OFDM system. We then experimentally evaluated the effect of PAPR reduction on the bit error rate (BER) performance and the results show the effectiveness of the proposed technique. At a bit error rate (BER) of 1 × 10−3, the receiver sensitivity of the proposed 2.5 Gb/s IM/DD optical OFDM system after 100-km standard single-mode fiber transmission has been improved by 0.8 dB, 1.3 dB and 3.1 dB for a launch power of 6.4 dBm, 8 dBm and 10 dBm respectively when compared with the classical system. |
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| Keywords: | Intensity Modulator/Direct Detection optical orthogonal frequency division multiplexing (IM/DD-OOFDM) Hadamard transform Clipping and filtering Discrete cosine transform/inverse discrete cosine (DCT/IDCT) transform Peak-to-average power ratio (PAPR) |
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