Ohlelweni lokuxhumana lwedijithali, lokho owamukelayo akutholayo isamba sesiginali edlulisiwe nomsindo wesiteshi.
Ukwamukela okuphelele kwamasignali edijithali kusekelwe emathubeni amancane wephutha njengombandela "ongcono kakhulu". Amaphutha acatshangelwe kulesi sahluko abangelwa kakhulu umsindo omhlophe we-Gaussian okhawulelwe webhendi. Ngaphansi kwalokhu kucatshangwa, isignali eshintshiwe yedijithali kanambambili ihlukaniswe yaba izinhlobo ezintathu: isignali eqinisekile, isignali yokuzethemba nesignali eguquguqukayo, kanye namathuba amancane wephutha ahlaziywa ngokomthamo ngamunye ngamunye. Ngaphezu kwalokho, amathuba ephutha okuthola isignali yebhendi yesisekelo esiningi ayahlaziywa.
Umgomo oyisisekelo wokuhlaziya ukuthatha inani eliphelele lesampula le-elementi yesignali eyamukelayo njengevektha esikhaleni sevekhtha esamukelayo esiyi-K-dimensional, bese uhlukanisa isikhala se-vector eyamukelayo sibe izifunda ezimbili. Nquma ukuthi ingabe iphutha lenzekile ngokuya ngokuthi i-vector etholiwe iwela kusiphi isifunda. Umdwebo webhulokhi womamukeli ophelele ungatholwa futhi izinga lephutha elincane lingabalwa ngombandela wesinqumo. Lesi silinganiselo sephutha elincane ngokwethiyori lilungile, okungukuthi, ngokombono lincane kakhulu elingenzeka.
Izinga lephutha lebhithi elilungile lesignali enqunyiwe kanambambili linqunywa i-coefficient p kanye nesilinganiso se-signal-to-noise engu-E/n., kodwa alinabo ubudlelwano obuqondile nefomu lesiginali yegagasi. Uma i-coefficient p incane, izinga lephutha lebhithi liyancipha. Isignali ye-2PSK ine-coefficient encane yokuhlobana (p=-1) kanye nezinga lephutha lebhithi eliphansi kakhulu. Isignali ye-2FSK ingathathwa njengesignali ye-orthogonal ene-coefficient yokuxhumanisa p=0.
Ngesiginali enesignali nokuguquguquka, isignali ye-FSK kuphela isetshenziswa njengokuhlaziywa kommeleli, ngoba kulesi siteshi, i-amplitude nesigaba sesiginali zishintshwa ngokungahleliwe ngenxa yethonya lomsindo, ngakho isignali ye-FSK ifaneleka ngokuyinhloko isicelo. Ukwehliswa kokungaqondile kuyindlela engcono kakhulu yokwamukela ngenxa yoshintsho olungahleliwe lwesigaba sesiginali olubangelwa isiteshi.
Ngokuqhathanisa izinga elincane lephutha lomamukeli wangempela kanye nomamukeli ongcono kakhulu, kungabonakala ukuthi uma isilinganiso samandla esignali-kuya-kumsindo r kumamukeli wangempela silingana nesilinganiso E/n samandla ekhodi namandla omsindo we-spectral. ukuminyana kumamukeli ongcono kakhulu, ukusebenza kwezinga lephutha elincane kokubili kuyefana. Nokho, ngoba umamukeli wangempela uhlale engenakwenzeka ukufeza leli phuzu. Ngakho-ke, ukusebenza komamukeli wangempela kuhlala kungaphansi kwalokho kowamukela kahle kakhulu.
Lena indawo ka-ShenzhenI-HDV Phoi-electron I-Technology Ltd. ukukulethela "ukwamukela okungcono kakhulu kwezimpawu zedijithali", ngethemba lokukusiza, kanye ne-ShenzhenI-HDV Phoi-electron Technology Ltd. ngaphezuI-ONUuchungechunge, uchungechunge lwe-transceiver,OLTuchungechunge, kodwa futhi ukukhiqiza uchungechunge module, ezifana: Ukuxhumana module optical, optical zokuxhumana module, inethiwekhi module optical, zokuxhumana module optical, optical fibre module, Ethernet optical fibre module, njll, anganikeza isevisi izinga elihambisana izidingo zabasebenzisi ezahlukene ' , wamukele ukuvakashelwa kwakho.
