Pamene mphamvu yotumizira njira ya thupi imakhala yochuluka kuposa kufunikira kwa chizindikiro chimodzi, njirayo imatha kugawidwa ndi zizindikiro zambiri, mwachitsanzo, thunthu lamtundu wa foni nthawi zambiri limakhala ndi zizindikiro zambiri zomwe zimafalitsidwa mu fiber imodzi. Multiplexing ndi ukadaulo wothana ndi momwe mungagwiritsire ntchito njira yotumizira ma siginali angapo nthawi imodzi. Cholinga chake ndikugwiritsa ntchito mokwanira ma frequency band kapena nthawi zopangira njira ndikuwongolera kuchuluka kwa njira yogwiritsira ntchito.Pali njira ziwiri zodziwika bwino za ma sign multiplexing: Frequency division multiplexing (FDM) ndi Time division multiplexing (TDM). Kuchulukitsa kwa magawo a nthawi kumagwiritsidwa ntchito kawirikawiri pochulukitsa zizindikiro za digito ndipo zidzakambidwa mu Mutu 10. Kuchulukitsa kwa magawano pafupipafupi kumagwiritsidwa ntchito makamaka kuchulukitsa kwa zizindikiro za analogi, koma kungagwiritsidwenso ntchito pa zizindikiro za digito. Gawoli likambirana za mfundo ndi ntchito za FDM.
Frequency division multiplexing ndi njira yochulukitsira yomwe imagawaniza ma chaneli molingana ndi pafupipafupi. Mu FDM, bandwidth ya tchanelo imagawidwa m'magulu angapo osaphatikizika (ma subchannel), ndipo chizindikiro chilichonse chimakhala ndi imodzi mwamagawo ang'onoang'ono, ndipo payenera kukhala magulu osagwiritsidwa ntchito pafupipafupi (mabandi oteteza) pakati pa mayendedwe kuti apewe kulumikizana kwazizindikiro. Pamapeto olandira, fyuluta yoyenera ya bandpass imagwiritsidwa ntchito kulekanitsa zizindikiro zambiri, kuti mubwezeretsenso zizindikiro zofunika.
Chithunzi chomwe chili pansipa chikuwonetsa chithunzi cha block of frequency division multiplexing system. Pamapeto otumizira, siginecha iliyonse ya mawu a baseband imadutsa kasefa yotsika (LPF) kuti achepetse kuchuluka kwa siginecha iliyonse. Kenako, chizindikiro chilichonse chimasinthidwa pafupipafupi chonyamulira chosiyana, kotero kuti chizindikiro chilichonse chimasunthidwa kupita kumagulu ake pafupipafupi, kenako ndikupangidwira munjira yopatsira. Pamapeto olandila, zosefera zingapo za band-pass zokhala ndi ma frequency osiyanasiyana apakati zimagwiritsidwa ntchito kulekanitsa ma siginecha osinthidwa, ndipo ma sign a baseband ofananira amabwezedwa atatha kuchotsedwa.
Pofuna kupewa kusokonezana pakati pa ma siginoloji oyandikana, ma frequency onyamula f_c1,f_c2, f_cn akuyenera kusankhidwa kuti asiye gulu lina lachitetezo pakati pa sipekitiramu iliyonse yosinthidwa.
Zomwe zili pamwambazi ndi Shenzhen HDV Phoelectron Technology Ltd. kuti ikubweretsereni chidziwitso cha "frequency division multiplexing", ndikuyembekeza kukuthandizani, ndi Shenzhen HDV Phoelectron Technology Ltd.ONUmndandanda, ma transceiver angapo,OLTmndandanda, komanso kupanga gawo mndandanda, monga: Kulankhulana gawo kuwala, gawo kuwala kulankhulana, maukonde kuwala gawo, kulankhulana kuwala gawo, kuwala CHIKWANGWANI gawo, Efaneti kuwala CHIKWANGWANI gawo, etc., angapereke lolingana utumiki khalidwe zosowa osiyana owerenga '. , landirani kudzacheza kwanu.