Kwinkqubo yonxibelelwano lwedijithali, umamkeli ufumana isixa somqondiso ogqithisiweyo kunye nengxolo yesitishi.
Iulwamkelo olufanelekileyoyemiqondiso yedijithali esekwe kwikhrayitheriya “engcono” enempazamo encinci enokwenzeka. Iimpazamo eziqwalaselwe kwesi sahluko ikakhulu ngenxa yengxolo ye-Gaussian emhlophe elinganiselweyo. Ngaphantsi kolu qikelelo, isiginali emodareyithiweyo yedijithali yokubini yahlulwe yaba ziindidi ezintathu: isiginali eqinisekileyo, isiginali exhomekeke kwisigaba, kunye nesiginali eguquguqukayo. Ubuncinci obunokwenzeka bempazamo bucazululwa ngokobungakanani. Ukongeza, impazamo yokufumana imiqondiso ye-baseband enamanqanaba amaninzi ikwahlalutywa.
Iumgaqo osisiseko wohlalutyokukuqwalasela onke amaxabiso eisampulu zesimboli yomqondiso efunyenweyo njengevektha kwisithuba se-k-dimensional esifunyenweyo sevektha nokwahlula isithuba sevektha esifunyenweyo sibe yimimandla emibini. Ukuba impazamo yenzeka okanye ayenzeki kumiselwa ngokweyiphi ingingqi i-vector efunyenweyo iwela kuyo. Umzobo webhloko yomgaqo womamkeli ongcono kakhulu unokufunyanwa kwaye isantya sempazamo encinci singabalwa ngekhrayitheriya yesigqibo. Lo mlinganiso wempazamo encinci ngokwethiyori ulungile-oko kukuthi, elona lincinci ngokwethiyori enokwenzeka.
Ieyona mpazamo yebitireyithi ye-binary deterministic signal imiselwa yi-correlation coefficient p yeempawu ezimbini kunye ne-signal-to-noise ratio E/n, kodwa ayinabudlelwane obuthe ngqo kunye nophawu lwamaza. Incinci i-coefficient yonxulumano p, kokukhona isezantsi isantya sempazamo encinci. I-coefficient yokulungelelaniswa kwesignali ye-2PSK yeyona incinci (p = -1), kwaye izinga layo lephutha elincinci lisezantsi. Isignali ye-2FSK inokuthathwa njengomqondiso we-quadrature kunye ne-coefficient yayo yokulungelelanisa i-p = 0.
Ukwenzela iuphawu lokulandela isigabakunye nomqondiso oguquguqukayo, kuphelaUmqondiso weFSKisetyenziswe njengommeli wokuhlalutya, kuba kule tshaneli, i-amplitude kunye nesigaba sesignali sitshintsha ngokungaqhelekanga ngenxa yempembelelo yengxolo, ngoko umqondiso we-FSK ufanelekile kakhulu kwisicelo. Ekubeni umjelo ubangela utshintsho olungakhethiyo kwisigaba somqondiso, ukuchithwa okuhambelanayo akunakusetyenziswa. Endaweni yoko, i-demodulation engahambelaniyo yeyona ndlela ilungileyo yokufumana umqondiso.
Xa kuthelekiswa nemilinganiselo yempazamo encinci yomamkeli kanyeoyena mamkeli, kunokubonwa ukuba ukuba umlinganiselo wamandla wesignali ukuya kwingxolo r kumamkeli wokwenyani ulingana nomlinganiselo wesimboli yamandla kuxinaniso lwamandla okubonwa kwengxolo koyena mamkeli u-E/n, ukusebenza kwesantya sempazamo encinci ezimbini ziyafana. Nangona kunjalo, oku akusoloko kusenzeka ngenxa yabamkeli bokwenene. Ke, umsebenzi womamkeli wokwenyani uhlala umbi ngakumbi kunalowo wamkela ungcono.
Oku koko Shenzhen HDV Phoelectron Technology Co., Ltd. kuwe. ikuzisa "Eyona nto ilungileyo yoKwamkelwa kweMiqondiso yeDijithali". Ndiyathemba ukuba eli nqaku linokukunceda ukwandisa ulwazi lwakho. Ngaphandle kweli nqaku ukuba ujonge inkampani elungileyo yomenzi wezixhobo zonxibelelwano lwefiber onokuthi uyithathele ingqalelongathi.
Shenzhen HDV photoelectric Technology Co., Ltd.ikakhulu ngumvelisi weemveliso zonxibelelwano. Okwangoku, izixhobo eziveliswayo zigubungela iONU series, uthotho lwemodyuli yokubona, OLT series, kwayetransceiver series. Sinokubonelela ngeenkonzo ezilungiselelwe iimeko ezahlukeneyo. Wamkelekile ukubabonisana.
