摘要
In this paper,a Radio Over Fiber (ROF) system with a Digital Pre-Distorter (DPD) for WCDMA signal transmission is investigated.A Look-Up Table (LUT) based DPD and a Memory Polynomial (MP) DPD are applied in the ROF link so as to suppress the out-of-band spurious spectrum and improve the transmission performance.The experimental results show that the out-of-band emission due to existence of the third-order Inter-Modulation Distortion (IMD3) is obviously sup-pressed by these two DPD.An Adjacent Channel Power Ratio (ACPR) improvement of 8 dB is ob-tained for a single-carrier WCDMA signal transmission.These two DPD have equal ability in lin-earization of the ROF system for a three-carrier WCDMA signal transmission.There is no apparent memory effects exist in the ROF link.
In this paper, a Radio Over Fiber （ROF） system with a Digital Pre-Distorter （DPD） for WCDMA signal transmission is investigated. A Look-Up Table （LUT） based DPD and a Memory Polynomial （MP） DPD are applied in the ROF link so as to suppress the out-of-band spurious spectrum and improve the transmission performance. The experimentM results show that the out-of-band emission due to existence of the third-order Inter-Modulation Distortion （IMD3） is obviously sup- pressed by these two DPD. An Adjacent Channel Power Ratio （ACPR） improvement of 8 dB is ob- tained for a single-carrier WCDMA signal transmission. These two DPD have equal ability in lin- earization of the ROF system for a three-carrier WCDMA signal transmission. There is no apparent memory effects exist in the ROF link.
基金
Supported by the National Natural Science Foundation of China (No. 60972064)
