Sezvatinoziva tese, iyo walkie-talkie ndiyo kiyi mudziyo mune isina waya intercom system.Iyo walkie-talkie inoshanda sechibatanidza chekufambisa kwezwi mune isina waya yekutaurirana system.Iyo dijitari walkie-talkie inogona kukamurwa kuita frequency division kuwanda kuwana (FDMA) uye nguva yekupatsanura kuwanda kuwana (TDMA) chiteshi.Saka pano tinotanga nezvakanakira nezvayakaipira zvemhando mbiri uye mutsauko uripo pakati pedhijitari neanalog walkie-talkies:
1.Two-channel processing modes ye digital walkie-talkie
A.TDMA(Nguva Divisheni Yakawanda Kuwana): iyo mbiri-slot TDMA modhi inogamuchirwa kupatsanura 12.5KHz chiteshi kuita maviri slots, uye nguva yega yega slot inogona kutumira izwi kana data.
Zvakanakira:
1. Kaviri huwandu hwechaneli yeanalogi system kuburikidza neinodzokorora
2. Mumwe anodzokorora anoita basa reanodzokorora maviri uye anoderedza mari yemidziyo yehardware.
3. Kushandisa tekinoroji yeTDMA kunobvumira mabhatiri e-walkie-talkie kushanda kusvika ku40% kureba pasina kutapurirana kunoramba kuripo.
Zvakaipa:
1. Izwi uye data haigone kufambiswa panguva imwechete slot.
2. Kana iyo inodzokorora muhurongwa ikakundikana, iyo FDMA system inongorasikirwa negwara rimwe chete, nepo TDMA system icharasikirwa nematanho maviri.Saka, kutadza kunetesa kugona kwakaipa kupfuura FDMA.
B.FDMA(Frequency Division Multiple Access):FDMA modhi inogamuchirwa, uye chiteshi bandwidth i6.25KHz, iyo inovandudza zvakanyanya mashandisirwo ekushandiswa.
Zvakanakira:
1. Uchishandisa 6.25KHz ultra-narrow band channel, chiyero chekushandiswa kwe spectrum chinogona kupetwa kaviri kana chichienzaniswa neyechinyakare analog 12.5KHz system isina anodzokorora.
2. Muchiteshi che6.25KHz, data yezwi uye data yeGPS inogona kutumirwa panguva imwe chete.
3. Nekuda kwekurodza bhandi nyoro hunhu hwesefa yekugamuchira, kunzwa kwekugashira kweid yekutaurirana kwakagadziridzwa zvinobudirira muchiteshi che6.25KHz.Uye mhedzisiro yekugadziriswa kwekukanganisa, kureba kwekutaurirana kunenge 25% yakakura kupfuura yechinyakare analog FM radio.Naizvozvo, pakukurukurirana kwakananga pakati penzvimbo hombe neredhiyo michina, iyo FDMA nzira ine zvimwe zvakanakira.
Musiyano uripo pakati pedigital walkie-talkie neanalogi walkie-talkie
1.Kugadzirisa zviratidzo zvezwi
Digital walkie-talkie: data-based communication mode yakagadziridzwa nedigital signal processor ine chaiyo encoding yedhijitari uye baseband modulation.
Analog walkie-talkie: nzira yekukurukurirana inogadzirisa izwi, kusaina, uye inoenderera-wave kune inotakura frequency yewalkie-talkie uye inogadziridzwa kuburikidza nekukwidziridzwa.
2.Kushandiswa kwezvinhu zvakasiyana-siyana
Digital walkie-talkie: yakafanana neserura dhijitari tekinoroji, dijitari walkie-talkie inogona kurodha vashandisi vakawanda pane yakapihwa chiteshi, kunatsiridza mashandisirwo emagetsi, uye kushandisa zvirinani zviwanikwa zvespectrum.
Analog walkie-talkie: kune matambudziko akadai sekushandiswa kwakaderera kwema frequency zviwanikwa, kusavimbika kwekufona, uye imwe mhando yemhando yebhizinesi, isingachakwanise kuzadzisa zvinodiwa zvekutaurirana zvevatengi veindasitiri.
3. Call quality
Nekuti tekinoroji yekutaurirana yedhijitari ine mu-system kukanganisa kugadzirisa kugona, uye ichienzaniswa neanalog walkie-talkie, inokwanisa kuwana zvirinani inzwi uye mhando yeodhiyo munzvimbo yakafararira yechiratidzo uye kugamuchira kushoma ruzha pane analog walkie-talkie.Pamusoro pezvo, iyo dhijitari system ine kudzvanyirira kwakanaka kwemheremhere uye inogona kuteerera manzwi akajeka munzvimbo dzine ruzha.
Nguva yekutumira: Aug-06-2021