Chinese Optics Letters, 2010, 8 (9): 875, Published Online: Oct. 18, 2010
Phase pre-emphasis for PAPR reduction in optical OFDM systems based on OIDFT or time lens Download: 524次
峰均比 正交频分复用 光纤通信 相位预加重 光纤非线性 060.4230 Multiplexing 060.4510 Optical communications 190.4370 Nonlinear optics, fibers
Abstract
Phase pre-emphasis is theoretically studied and introduced to reduce peak-to-average power ratio (PAPR) in optical orthogonal frequency division multiplexing (OFDM) systems. In intensity modulated (IM) systems, simulations show noticeable PAPR reductions: 4.14 dB (N = 16) and 15.48 dB (N = 512) in time lens-based OFDM, N is the number of subcarriers. An equation is developed to calculate phase values and is proved to be effective. Optical implementing methods are proposed and analyzed. In a time lens-based OFDM system, phase pre-emphasis reduces fiber nonlinearity and results in a 5.2-dB increase of launch power at the bit error rate (BER) of 10?6. Simulations also show similar PAPR reduction and fiber nonlinearity mitigation in optical inverse discrete Fourier transformer (OIDFT) based OFDM systems.
Jing Shao, Wei Li, Xiaojun Liang. Phase pre-emphasis for PAPR reduction in optical OFDM systems based on OIDFT or time lens[J]. Chinese Optics Letters, 2010, 8(9): 875.