Theoretical analysis of a hybrid AM-VSB/QAM SCM lightwave system with adjustable preclipping levels

Author

Tarn, Chen-Wen ; Shin, Hong-Bin

Author_Institution

Dept. of Electron. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

17

Issue

11

fYear

1999

fDate

11/1/1999 12:00:00 AM

Firstpage

2219

Lastpage

2224

Abstract

A model for the analysis of the performance of a hybrid multichannel amplitude modulation vestigal sideband (AM-VSB)/quadrature amplitude modulation (QAM) subcarrier-multiplexed (SCM) lightwave transmission system with adjustable preclipping levels is presented. In the proposed model, two-stage adjustable clipping effect due to the preclipper and laser are considered. The analytical result shows that in this hybrid system the bit error rate (BER) is improved while the carrier-to nonlinear distortion (C/NLD) ratio is degraded as the value of the preclipping factor, is decreased, and vice versa. The validity of this model is verified by comparing the theoretical optimal value of τ which is derived using our approach with the existed experimental result

Keywords

amplitude modulation; digital communication; error statistics; nonlinear distortion; optical fibre communication; optical modulation; quadrature amplitude modulation; subcarrier multiplexing; BER improvement; C/NLD ratio; adjustable preclipping levels; amplitude modulation; bit error rate; carrier-to nonlinear distortion ratio; hybrid AM-VSB/QAM SCM lightwave system; multichannel system; performance analysis model; quadrature amplitude modulation; subcarrier-multiplexed transmission system; vestigal sideband; Amplitude modulation; Bit error rate; Degradation; Diode lasers; Frequency; Laboratories; Laser modes; Noise level; Nonlinear distortion; Quadrature amplitude modulation;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.803014

Filename

803014