标题：Impact of ADC bandwidth and clipping ratio on COF-PON systems based on spatial coding and subcarrier multiplexing
作者：Xia, Tianjiao ;Guo, Changjian ;He, Sailing
作者机构：[Xia, Tianjiao ;Guo, Changjian ;He, Sailing ] Joint Laboratory of Optical Communications, Center for Optical and Electromagnetic Research, Zhejiang Un 更多
会议名称：2011 Symposium on Photonics and Optoelectronics, SOPO 2011
会议日期：May 16, 2011 - May 18, 2011
来源：2011 Symposium on Photonics and Optoelectronics, SOPO 2011
摘要：In this paper, we analyze the impact of analog-todigital convertor (ADC) bandwidth and clipping ratio on the performance of a 1 Gb/s × 15 user CDM-over-fiber-PON (COFPON) system based on 16-QAM modulation, spatial coding and subcarrier multiplexing. We consider the clipping ratio, resolution and bandwidth of ADCs with fixed sampling speed in both back-to-back and 25 km standard single mode fiber (SSMF) transmission cases, taking into account nonlinear propagation effects in fiber transmission. We find that the best error vector magnitude (EVM) performance can be achieved when a clipping ratio (CR) of 1.5-1.8 is applied for different ADC resolutions, and that in order to achieve an EVM of smaller than 0.12, an ADC with at least 5-bit resolution should be used. © 2011 IEEE.