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Reducing the peak-to-average power ratio with companding transform coding in 60 GHz OFDM-ROF systems

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6 Author(s)
Fan Li ; Key Laboratory for Micro/Nano Optoelectronic Devices of the Ministry of Education, College of Information Science and Engineering, Hunan University, Changsha 410082, China ; Jianjun Yu ; Zizheng Cao ; Jiangnan Xiao
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To reduce the nonlinear distortion in electrical devices, optical modulators, and transmission fiber, we adopt a companding transform coding technique to reduce the peak-to-average power ratio of the orthogonal frequency division multiplexing (OFDM) signal in an OFDM radio-over-fiber system. By adopting this technique, our experimental results show that the receiver sensitivity at a bit error ratio of 1 × 10-3 for a 2.98 Gb/s OFDM signal carried on a 60 GHz optical millimeter-wave after 50 km of standard single-mode fiber transmission is improved by about 0.6, 2.2, and 3.8 dB at launch powers of 0, 6, and 12 dBm, respectively.

Published in:

IEEE/OSA Journal of Optical Communications and Networking  (Volume:4 ,  Issue: 3 )