Iimowudi eziphambili zokumodareyitha kwedijithali zezi:I-Binary amplitude keying (2ASK) -utshintsho lwe-amplitude yesignali yomphathi; I-binary frequency shift keying (2FSK) -ukutshintsha rhoqo kwesignali yenkampani; I-binary phase shift keying (2PSK) -utshintsho lwesigaba somqondiso womthwali. I-differential phase shift keying (DPSK) yenziwe ngenxa yokuba isigaba senkqubo ye-2PSK yayingaqinisekanga.
I-2ASK kunye ne-2PSK zombini idinga i-bandwidth ephindwe kabini njengomlinganiselo wesimboli, ngelixa i-2FSK idinga i-bandwidth ngaphezu kwe-2ASK kunye ne-2PSK.
Umyinge wempazamo encinci yeenkqubo zokumodareyitha yedijithali yokubini ixhomekeke kwigalelo lomqondiso-kwingxolo yomlinganiselo we-demodulator. Ngokubhekiselele kwi-anti-additive Gaussian ingxolo emhlophe, i-2PSK ehambelanayo inomsebenzi ongcono kakhulu, ilandelwa yi-2FSK, kunye ne-2ASK iyona nto imbi.
Ukubuza yenye yeendlela zokuqala ezisisiseko zokumodareyitha. Iinzuzo zayo kukuba isebenzisa ibhendi ephezulu-frequency kwaye inezixhobo ezilula. Ububi bayo kukuba ayifunisebenza kakuhle ngokuchasene nengxolo kwaye unovakalelo kutshintsho lweempawu zetshaneli, nto leyo eyenza kube nzima ukufumana umthathi wesampulu asebenze kwesona sigqibo sisesona siphakathi.
I-FSK yindlela efunekayo yokumodareyitha kunxibelelwano lwedijithali. Inzuzo yayo kukuba inamandla okuchasana nokuphazamiseka kwaye ayichaphazeli utshintsho lweeparamitha zeshaneli, ngoko ke i-FSK ifanelekile ngokukhethekileyo kwiitshaneli eziphelayo; Ukungalungi kukuba ibhendi ehleliyo ibanzi, ngakumbi kwi-mf-sk, kwaye ukusetyenziswa kwebhendi kuphantsi. Okwangoku, inkqubo ye-FM isetyenziselwa ikakhulu ukuhanjiswa kwedatha ephakathi kunye nesantya esisezantsi.
I-PSK okanye i-DPSK yindlela yokumodareyitha ene-high transmission efficient. Ikhono layo lokuchasana nengxolo linamandla kune-ASK kunye ne-FSK, kwaye ayichaphazeli lula utshintsho lweempawu zesiteshi. Ngoko ke, isetyenziswe ngokubanzi kwi-high and medium-speed data transmission. I-Absolute phase shift (PSK) inengxaki yokungacaci kwesigaba somthwali ekuthotyweni okuhambelanayo, nto leyo engafane isetyenziswe ekugqithiseni ngokuthe ngqo ekusebenzeni. I-MDPSK isetyenziswa ngokubanzi.
Eli nqaku lingasentla linqaku elithi "Ukuguqulwa kwedijithali yeBinary," eziswe kuwe yi-Shenzhen HDV photoelectric Technology Co., Ltd. Iimveliso zonxibelelwano eziveliswe yikhava yenkampani:
Iindidi zeemodyuli: iimodyuli zefiber optical, Iimodyuli ze-Ethernet, iimodyuli ze-fiber optical transceiver, iimodyuli zokufikelela kwifiber optical, Iimodyuli ze-SSFP ezibonakalayo, kwayeI-SFP optical fibers, njl.
I-ONUudidi: EPON ONU, AC ONU, ifayibha optical ONU, CATV ONU, GPON ONU, XPON ONU, njl.
OLTiklasi: Ukutshintsha OLT, GPON OLT, EPON OLT, unxibelelwanoOLT, njl.
Iimveliso zemodyuli ezingentla zinokubonelela ngenkxaso yeemeko ezahlukeneyo zenethiwekhi. Iqela le-R&D elinobuchule kunye nelomeleleyo linokunceda abathengi abanemiba yobugcisa, kwaye iqela leshishini elicingayo nelinobuchule linokunceda abathengi bafumane iinkonzo ezikumgangatho ophezulu ngexesha lokubonisana kwangaphambili kunye nomsebenzi wasemva kokuvelisa. Wamkelekile kuweQhagamshelana nathikulo naluphi na uhlobo lombuzo.
