Teeb liab constellation shaping

Zhi Zhang et al.los ntawm Lub Tsev Kawm Ntawv ntawm Kev Sib Txuas Lus thiab Cov Ntaub Ntawv Engineering, University of Electronic Science thiab Technology ntawm Tuam Tshoj tau tsim lub constellation Reshaping chaotic encryption (CSCEn) scheme nrog cov txheeb cais faib tswj tau, raws li qhia hauv FIG 2. Ua ntej, orthogonal amplitude modulation (QAM) cov cim ua ntu zus tau muab faib. rau hauv ob peb ntu ntu, thiab qhov kev ua tau zoo (PS) tau ua raws li cov ntaub ntawv txheeb cais (SI) (los ntawm kev hloov pauv hauv cheeb tsam constellation).Tom qab ntawd, SI sequences tau encoded thiab encrypted rau hauv chaotic teeb liab theem siv qhov tseem ceeb faib algorithm.SI tau muab rho tawm ntawm qhov kawg tau txais kom rov qab tau qhov qub teeb liab [2].Cov kws tshawb fawb tau ntse xa cov teeb liab encrypted ps-16-qam hla tus qauv ib hom fiber ntau (SSMF) ntawm 25km.Vim tias cov tswv yim no tuaj yeem tsis tsuas yog paub txog kev xa tawm yooj yim nrog qhov tsis yooj yim thiab txhim kho kev ua haujlwm ntawm kev xa thiab tau txais cov cim, tab sis kuj tseem muaj kev ruaj ntseg txaus los tiv thaiv kev tawm tsam los ntawm qhov chaw kho qhov muag tsis raug cai (ONU), nws yuav undoubtedly muaj daim ntawv thov kev cia siab yav tom ntej.