光通信系统中前向纠错_FEC_码型的理论分析.pdf

312 Vol. 31 No. 2 20 094 PIEZOELECT ECT RICS ACOUST OOPTICS A r . 2009 :2009) ( FEC) 袁建国, 李秋俊, 刘 宇, 叶文伟 ( , 400065) : ( FEC) , FEC FEC FEC , FEC FEC , FEC , : ( FEC) ; ; FEC ; FEC ; :T N929. 11 : A Theoretical Analyses on the FEC Code Type for Opti cal Communication Systems YUAN Jianguo LI Qiujun LIU Yu YE Wenwei ( Key Lab. of O tical Fiber Com munications T echnology, Chongqing University of Posts T elecom munications, Chongqing 400065, China) Abstract: The const ruct ion rinci le, a lication selection and errorcorrection erformance of the forw ard error correct ion ( FEC) code ty es to be a licable for o tical communication systems have theoret ically been analyzed. The main construction rinci les of the FEC code ty e for o tical communication systems are ro osed. Both the simulation analyses and the com arative analyses of the errorcorrection erformance for t he inband FEC code ty e and outofband FEC code ty e in o tical communication systems are erformed. The analyses show that the error correct ion erformances of the inband FEC code ty e and outofband FEC code ty e are relatively lower, so it is necessary to study the su er forw ard error correction ( su erFEC) code t y e w ith t he bett er errorcorrection er formance in order to meet the requirements of the increasing develo ment for o tical communicat ion systems. Key words:forw ard error correct ion ( FEC) code; the construction rinci le of the code ty e; inband FEC code ty e; outofband FEC code ty e; o tical communication syst ems ( FEC) FEC , , : , ( OSNR) ( 1) , , , , , , , [ 12]