Title :
Reducing the peak-to-average power ratio with companding transform coding in 60 GHz OFDM-ROF systems
Author :
Li, Fan ; Yu, Jianjun ; Cao, Zizheng ; Xiao, Jiangnan ; Chen, Hongxian ; Chen, Lin
Author_Institution :
Key Lab. for Micro/Nano Optoelectron. Devices of the Minist. of Educ., Hunan Univ., Changsha, China
fDate :
3/1/2012 12:00:00 AM
Abstract :
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.
Keywords :
OFDM modulation; error statistics; nonlinear distortion; optical receivers; radio-over-fibre; transform coding; OFDM radio-over-fiber system; OFDM signal; OFDM-ROF systems; bit error ratio; bit rate 2.98 Gbit/s; companding transform coding technique; electrical devices; frequency 60 GHz; nonlinear distortion; optical millimeter-wave; optical modulators; orthogonal frequency division multiplexing signal; peak-to-average power ratio; receiver sensitivity; standard single-mode fiber transmission; transmission fiber; Encoding; Nonlinear optics; Optical modulation; Optical receivers; Optical sensors; Peak to average power ratio; Companding transform (CT); Nonlinear distortion; Nonlinear effects; OFDM-ROF; Peak-to-average power ratio (PAPR);
Journal_Title :
Optical Communications and Networking, IEEE/OSA Journal of
DOI :
10.1364/JOCN.4.000202
