Umahluko phakathi kwe-digital walkie-talkie kunye ne-analog walkie-talkie

Njengoko sonke sisazi, i-walkie-talkie sisixhobo esiphambili kwinkqubo ye-intercom engenazingcingo.I-walkie-talkie isebenza njengekhonkco lokuhanjiswa kwelizwi kwinkqubo yonxibelelwano engenazingcingo.I-walkie-talkie yedijithali inokwahlulwa ibe yi-frequency division yofikelelo oluninzi (FDMA) kunye ne-time division multiple access (TDMA) amajelo.Ke apha siqala ngezinto ezilungileyo kunye nezibi kwezi modeli zimbini kunye nomahluko phakathi kwedijithali kunye ne-analog walkie-talkies:

1.Iindlela zokusetyenzwa kweetshaneli ezimbini ze-digital walkie-talkie

A.TDMA(ICandelo leXesha lokuFikelela okuninzi): Imowudi ye-TDMA ye-slot ephindwe kabini yamkelwe ukwahlula i-channel ye-12.5KHz kwiindawo zokubeka ezimbini, kwaye ixesha ngalinye liyakwazi ukuhambisa ilizwi okanye idatha.

Izinto eziluncedo:

1. Phinda kabini umthamo wetshaneli wenkqubo ye-analog ngokuphinda

2. Umntu ophindayo wenza umsebenzi wabaphinda kabini kwaye unciphisa utyalo-mali lwezixhobo zehardware.

3. Ukusebenzisa iteknoloji ye-TDMA ivumela iibhetri ze-walkie-talkie ukuba zisebenze ukuya kuthi ga kwi-40% ubude ngaphandle kosulelo oluqhubekayo.

Izinto ezingeloncedo:

1. Izwi kunye nedatha ayikwazi ukuhanjiswa ngexesha elifanayo.

2. Xa umntu ophindayo kwisistim engaphumeleli, isistim yeFDMA iya kuphulukana netshaneli enye kuphela, lo gama iTDMA iya kuphulukana namajelo amabini.Ke, ukusilela ukwenza buthathaka amandla kubi kune-FDMA.

I-B.FDMA(iCandelo leFrequency Access Multiple):Imodi ye-FDMA yamkelwe, kwaye i-bandwidth yesitishi yi-6.25KHz, ephucula kakhulu ukusetyenziswa kwamaza.

Izinto eziluncedo:

1. Ukusebenzisa i-6.25KHz i-ultra-narrow band channel, izinga lokusebenzisa i-spectrum lingaphinda liphindwe kabini xa kuthelekiswa nenkqubo ye-analog yendabuko ye-12.5KHz ngaphandle kokuphinda.

2. Kwitshaneli ye-6.25KHz, idatha yezwi kunye nedatha ye-GPS inokudluliselwa ngexesha elifanayo.

3. Ngenxa yophawu olubukhali lwebhanti efunyenweyo, ukuva uvakalelo lwe-id yonxibelelwano luphuculwe ngokufanelekileyo kwitshaneli ye-6.25KHz.Kwaye umphumo wokulungiswa kwempazamo, umgama wonxibelelwano umalunga ne-25% enkulu kunomsakazo we-analog FM.Ke ngoko, kunxibelelwano oluthe ngqo phakathi kweendawo ezinkulu kunye nezixhobo zerediyo, indlela ye-FDMA ineenzuzo ezininzi.

Umahluko phakathi kwe-digital walkie-talkie kunye ne-analog walkie-talkie

1.Ukwenziwa kwemiqondiso yelizwi

I-Digital walkie-talkie: imowudi yonxibelelwano esekelwe kwidatha ephuculwe yiprosesa yesignali yedijithali kunye ne-encoding ethile yedijithali kunye ne-baseband modulation.

I-analog walkie-talkie: imo yonxibelelwano emodareyitha ilizwi, umqondiso, kunye ne-wave eqhubekayo ukuya kwi-carrier frequency ye-walkie-talkie kwaye iphuculwe ngokwandisa.

2.Ukusetyenziswa kwemithombo ye-spectrum

I-Digital walkie-talkie: efana neteknoloji yedijithali yeselula, i-digital walkie-talkie inokulayisha abasebenzisi abaninzi kwitshaneli enikiweyo, iphucule ukusetyenziswa kwe-spectrum, kwaye isebenzise kakuhle izibonelelo ze-spectrum.

I-analog walkie-talkie: kukho iingxaki ezinjengokusetyenziswa okuphantsi kwemithombo ye-frequency, ukugcinwa kwemfihlo komnxeba okulambathayo, kunye nohlobo olulodwa loshishino, olungasakwazi ukuhlangabezana neemfuno zonxibelelwano lwabathengi beshishini.

3. Umgangatho womnxeba

Ngenxa yokuba iteknoloji yonxibelelwano lwedijithali ine-in-system ikhono lokulungiswa kwempazamo, kwaye uthelekise ne-analog walkie-talkie, inokufikelela kwilizwi elingcono kunye nomgangatho womsindo kuluhlu olubanzi lweendawo zesignali kwaye ifumane ingxolo ye-audio encinci kune-analog walkie-talkie.Ukongeza, inkqubo yedijithali inokucinezelwa okubalaseleyo kwengxolo yendawo engqongileyo kwaye inokuphulaphula amazwi acacileyo kwiindawo ezingxolayo.