Thaum lub peev xwm kis tau tus mob ntawm lub cev channel siab dua qhov kev thov rau ib lub teeb liab, cov channel tuaj yeem sib koom los ntawm ntau lub teeb liab, piv txwv li, cov kab hauv lub cev ntawm lub xov tooj feem ntau muaj ntau txhiab lub teeb liab kis tau los ntawm ib qho fiber ntau. Multiplexing yog ib qho cuab yeej siv los daws qhov kev siv cov channel kom xa ntau lub teeb liab tib lub sijhawm. Nws lub hom phiaj yog ua kom siv tag nrho cov zaus band lossis lub sijhawm cov peev txheej ntawm cov channel thiab txhim kho kev siv tus nqi ntawm cov channel.Nws muaj ob txoj hauv kev ntawm cov teeb liab multiplexing: Zaus division multiplexing (FDM) thiab Time division multiplexing (TDM). Lub sij hawm faib multiplexing feem ntau yog siv rau multiplexing ntawm digital signals thiab yuav tau tham nyob rau hauv Tshooj 10. zaus division multiplexing feem ntau yog siv rau multiplexing ntawm analog signals, tab sis nws kuj siv tau rau digital signals. Tshooj lus no yuav tham txog cov hauv paus ntsiab lus thiab kev siv ntawm FDM.
Zaus division multiplexing yog ib txoj kev multiplexing uas faib cov channel raws li zaus. Hauv FDM, qhov bandwidth ntawm cov channel tau muab faib ua ntau qhov sib tshooj tsis sib tshooj (subchannels), thiab txhua lub teeb liab tuav ib qho ntawm cov subchannels, thiab yuav tsum muaj cov bandwidth tsis siv (kev tiv thaiv bands) ntawm cov channel los tiv thaiv cov teeb liab sib tshooj. Thaum kawg tau txais, cov lim bandpass tsim nyog yog siv los cais ntau lub teeb liab, thiaj li yuav rov qab tau cov teeb liab xav tau.
Daim duab hauv qab no qhia txog daim duab thaiv ntawm qhov sib faib zaus multiplexing system. Thaum kawg ntawm kev xa tawm, txhua lub suab teeb liab hauv lub suab yog thawj zaug dhau los ntawm cov lim dej qis (LPF) txhawm rau txhawm rau txwv qhov siab tshaj plaws ntawm txhua lub teeb liab. Tom qab ntawd, txhua lub teeb liab raug hloov mus rau qhov sib txawv ntawm cov cab kuj, yog li ntawd txhua lub teeb liab tau txav mus rau nws tus kheej ntau zaus, thiab tom qab ntawd muab tso rau hauv cov channel rau kev sib kis. Thaum qhov kawg tau txais, cov ntxaij lim dej ntawm band-pass nrog ntau qhov chaw sib txawv yog siv los cais cov teeb liab modulated, thiab cov teeb liab sib thooj baseband tau zoo dua tom qab lawv demodulated.
Txhawm rau tiv thaiv kev sib cuam tshuam ntawm cov teeb liab uas nyob ib sab, cov neeg nqa khoom zaus f_c1, f_c2, f_cn yuav tsum raug xaiv kom tawm hauv qee qhov kev tiv thaiv band ntawm txhua qhov teeb liab modulated spectrum.
Cov saum toj no yog Shenzhen HDV Phoelectron Technology Ltd. los coj koj txog "frequency division multiplexing" kev piav qhia, vam tias yuav pab tau koj, thiab Shenzhen HDV Phoelectron Technology Ltd. ntxiv rauONUseries, transceiver series,OLTseries, tab sis kuj tsim module series, xws li: Kev sib txuas lus kho qhov muag module, optical kev sib txuas lus module, network kho qhov muag module, kev sib txuas lus optical module, optical fiber module, Ethernet optical fiber module, thiab lwm yam., tuaj yeem muab cov kev pabcuam zoo sib xws rau cov neeg siv khoom sib txawv. , txais tos koj tuaj xyuas.