Mudhijitari yekutaurirana sisitimu, anogamuchira anogashira huwandu hweiyo inofambiswa chiratidzo uye ruzha rwechiteshi.
Theoptimal receptionzvemasaini edhijitari zvichibva pane "zvakanakisa" chirevo chine diki kukanganisa kukanganisa.Mhosho dzakatariswa muchitsauko chino dzakanyanya kukonzerwa nebhendi-shoma chena Gaussian ruzha.Pasi peiyi fungidziro, iyo bhanari yedhijitari modulated siginecha yakakamurwa kuita mhando nhatu: chaiyo chiratidzo, chikamu-inotsamira chiratidzo, uye inochinja-chinja chiratidzo.Iko kushoma kunobvira kukanganisa kukanganisa kunoongororwa quantitatively.Pamusoro pezvo, mukana wekukanganisa wekugamuchira akawanda-level baseband masaini anoongororwa zvakare.
Thenheyo inokosha yekuongororandeyekutarisa ese masampled emhando yechiratidzo chakagamuchirwa sevheji mune k-dimensional yakagamuchirwa vector nzvimbo uye kupatsanura yakagamuchirwa vector nzvimbo mumatunhu maviri.Kana kukanganisa kukaitika kunotariswa zvichienderana nenzvimbo iyo vector yakagamuchirwa inowira mairi.Iyo musimboti block dhizaini yeakanakisa anogashira inogona kuwanikwa uye bhiti kukanganisa mwero inogona kuverengerwa nechisarudzo chesarudzo.Ichi chikanganiso chiyero chakakwana-kureva kuti, diki diki zvinogoneka.
Theoptimal bit errormwero weiyo binary deterministic chiratidzo inotarwa neiyo corelation coefficient p yezviratidzo zviviri uye chiratidzo-kune-ruzha reshiyo E/n, asi haina hukama hwakananga neiyo chiratidzo waveform.Iyo idiki iyo corelation coefficient p, inodzika iyo bit kukanganisa mwero.Iyo yekubatanidza coefficient yeiyo 2PSK siginecha ndiyo idiki (p = -1), uye yayo diki kukanganisa mwero ndiyo yakaderera.Chiratidzo che2FSK chinogona kutorwa sechiratidzo che quadrature uye coefficient yayo yekubatanidza ndeye p = 0.
For thechikamu-chinotevera chiratidzouye chiratidzo chinoshanduka, cheteFSK chiratidzoinoshandiswa semumiriri wekuongorora, nokuti muchiteshi ichi, amplitude uye chikamu chechiratidzo chinoshanduka zvisingaite nekuda kwesimba reruzha, saka chiratidzo cheFSK chinonyanya kukodzera kushandiswa.Sezvo chiteshi chiri kukonzera shanduko dzisina kujairika muchikamu chechiratidzo, dhizaini yakabatana haigone kushandiswa.Pane kudaro, kusapindirana demodulation ndiyo nzira yakanakisa yekugamuchira chiratidzo.
Kuenzaniswa neiyo bit kukanganisa mitengo yeanogamuchira uye iyooptimal receiver, zvinogona kuoneka kuti kana chiratidzo-ku-ruzha simba reshiyo r mune chaiyo inogamuchira yakaenzana nereshiyo yechiratidzo simba kune ruzha simba rekutarisa density mune yakakwana inogamuchira E / n, iyo bit kukanganisa mwero kuita kweiyo maviri akafanana.Nekudaro, izvi hazvigoneke nguva dzose nekuda kwevanogamuchira chaivo.Saka, kuita kweanogamuchira chaiko kunogara kwakashata kupfuura kweanogamuchira zvakanyanya.
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