Pamene amphamvu yotumiziraya mayendedwe akuthupi ndi apamwamba kuposa kufunikira kwa chizindikiro chimodzi, njirayo imatha kugawidwa ndi ma sign angapo.Mwachitsanzo, thunthu la chingwe cha telefoni kaŵirikaŵiri chimakhala ndi masauzande ambiri a zizindikiro zotumizidwa pa chingwe chimodzi cha kuwala. Multiplexing ndi teknoloji yomwe imathetsa momwe mungagwiritsire ntchito njira yotumizira zizindikiro zambiri panthawi imodzi. Cholinga chake ndikugwiritsa ntchito mokwanira ma frequency band kapena zida zanthawi za tchanelo ndikuwongolera kuchuluka kwa kagwiritsidwe ntchito ka tchanelo.
Palinjira ziwiri zodziwika bwino za ma sign multiplexing: Frequency division multiplexing (FDM) ndi time division multiplexing (TDM) Kugawa nthawi zambiri kumagwiritsidwa ntchito pochulukitsa zizindikiro za digito. Frequency division multiplexing imagwiritsidwa ntchito makamaka pochulukitsa ma siginoloji a analogi koma imatha kugwiritsidwanso ntchito ngati siginecha ya digito. Gawoli likambirana mfundo ndikugwiritsa ntchito FDM.
Frequency Division Multiplexingndi njira yochulukitsa yomwe imagawaniza ma tchanelo malinga ndi pafupipafupi. Mu FDM, bandwidth ya kanjira imagawidwa kukhala kuchuluka kwa ma frequency band (ma sub-channel) omwe salumikizana. Njira iliyonse yazizindikiro imakhala ndi imodzi mwamayendedwe ang'onoang'ono, ndipo magulu osagwiritsidwa ntchito pafupipafupi (magulu achitetezo) ayenera kusungidwa pakati pa mayendedwe kuti apewe kuphatikizika kwa ma siginecha. Pamapeto olandira, fyuluta yoyenera ya band-pass imalekanitsa zizindikiro zambiri ndikubwezeretsanso zizindikiro zofunika.
Chithunzi chotsatira chikuwonetsachithunzi cha block block cha frequency Division multiplexing system. Pamapeto otumizira, siginecha iliyonse ya mawu a baseband imadutsa kaye zosefera zotsika (LPF) kuti muchepetse kuchuluka kwa siginecha iliyonse. Kenako, njira iliyonse yazizindikiro imasinthidwa kukhala ma frequency osiyanasiyana onyamula, kotero kuti njira iliyonse yamasigino imasunthidwa kumayendedwe ake pafupipafupi, kenako ndikuphatikizidwa ndikutumizidwa kunjira yopatsira. Zosefera zingapo za band-pass zokhala ndi ma frequency osiyanasiyana apakati pamapeto olandila zimagwiritsidwa ntchito kulekanitsa ma siginecha osinthidwa. Akatsitsidwa, ma sign a baseband ofananira panjira iliyonse amabwezedwa.
Pofuna kupewakusokonezanaPakati pa ma sigino oyandikana, ma frequency onyamulira F ayenera kusankhidwa moyenerera_ c1,f_ c2,···,f_ Cn kuti gulu lina la alonda lisungidwe pakati pa ma sipekitiramu osinthika.
Ichi ndi chiyaniMalingaliro a kampani Shenzhen HDV phoelelectron Technology Co., Ltd. wabweretsa kwa inu za chidziwitso cha frequency division multiplexing. Ndikukhulupirira kuti nkhaniyi ikuthandizani kuti muwonjezere chidziwitso chanu. Kupatula nkhaniyi ngati mukuyang'ana kampani yabwino yopanga zida zoyankhulirana zama fiber zomwe mungaganizirezambiri zaife.
Shenzhen HDV photoelectric Technology Co., Ltd. ndiyomwe imapanga zinthu zolumikizirana. Pakadali pano, zida zomwe zimapangidwa zimakwiriraZithunzi za ONU, Optical module mndandanda, Zithunzi za OLT,nditransceiver mndandanda. Titha kupereka ntchito makonda pazochitika zosiyanasiyana. Mwalandiridwafunsani.
