Impact of ADC Bandwidth and Clipping Ratio on COF-PON Systems Based on Spatial Coding and Subcarrier Multiplexing

Author

Xia, Tianjiao ; Guo, Changjian ; He, Sailing

Author_Institution

Center for Opt. & Electromagn. Res., Zhejiang Univ., Hangzhou, China

fYear

2011

fDate

16-18 May 2011

Firstpage

1

Lastpage

4

Abstract

In this paper, we analyze the impact of analog-to digital convertor (ADC) bandwidth and clipping ratio on the performance of a 1 Gb/s x 15 user CDM-over-fiber-PON (COF PON) 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.

Keywords

analogue-digital conversion; optical fibre networks; quadrature amplitude modulation; subcarrier multiplexing; ADC bandwidth; CDM-over-fiber-PON; COF PON system; COF-PON systems; QAM modulation; analog-to digital convertor bandwidth; clipping ratio; error vector magnitude; nonlinear propagation; spatial coding; standard single mode fiber transmission cases; subcarrier multiplexing; Bandwidth; Encoding; Multiplexing; Nonlinear optics; Optical filters; Optical pulses; Passive optical networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Photonics and Optoelectronics (SOPO), 2011 Symposium on

Conference_Location

Wuhan

ISSN

2156-8464

Print_ISBN

978-1-4244-6555-2

Type

conf

DOI

10.1109/SOPO.2011.5780531

Filename

5780531