Sistimi ea phetisetso ea waelese ea COFDMe na le litebello tse pharaletseng tsa tšebeliso mafapheng a mangata, haholo-holo litšebelisong tse sebetsang tsa lipalangoang tse bohlale, tsa bongaka tse bohlale, metse e bohlale, le mafapha a mang, moo e bontšang ka botlalo ho sebetsa ha eona, botsitso, le ho tšepahala.
Melemo ea eona e kang tšebeliso e phahameng ea mahlaseli, bokhoni bo matla ba ho thibela mekhoa e mengata, phetisetso ea data e potlakileng le ts'ireletso e phahameng li etsa hore mekhoa ea phetisetso ea waelese ea COFDM e be le bokhoni bo boholo ba tsoelo-pele.
Ka tsoelopele e potlakileng ea mahlale le thekenoloji,thekenoloji ya puisano ya waelesee se e sebelisoa haholo mafapheng a fapaneng.Har'a bona, COFDM (Coded Orthogonal Frequency Division Multiplexing) tsamaiso ea phetisetso ea waelese butle-butle e fetohile theknoloji ea linaleli tšimong ea puisano e se nang mohala ka lebaka la ts'ebeliso e ntle ea li-spectrum le bokhoni bo botle ba ho thibela mekhoa e mengata.
Sengoliloeng sena se tla hlahloba ka botebo melao-motheo, maemo a ts'ebeliso le melemo ea sistimi ea phetisetso ea waelese ea COFDM ha e bapisoa le mahlale a mang.
1. Molao-motheo oa COFDM tsamaiso ea waelese phetiso
Sistimi ea phetisetso ea waelese ea COFDM e sebelisa likhoutu tsa mocha, ho feto-fetoha ha lets'oao le mahlale a phetiso ea data ho hlokomela phetiso ea data ea litšoantšo.Taba ea pele, likhoutu tsa mocha li hatella le ho khouta data ea setšoantšo ho fokotsa palo ea data e fetisoang.Ebe, ho feto-fetoha ha lets'oao ho hlophisa data e kentsoeng ho mofani oa thepa ka har'a sehlopha se boletsoeng sa frequency ho hlokomela ho fetoha ha data.Letšoao le fetotsoeng le romelloa sebakeng sa ho amohela ka phetiso ea data ho phethela phetiso ea data ea setšoantšo ka waelese.
2. Maemo a ts'ebeliso ea sistimi ea phetisetso ea waelese ea COFDM
2.1.Lipalangoang tse bohlale
Lefapheng la lipalangoang tse bohlale, litsamaiso tsa phetisetso ea waelese ea COFDM li ka sebelisoa ho lekola sephethephethe, ho latela koloi, taolo ea mats'oao a sephethephethe, joalo-joalo ho ntlafatsa ts'ebetso ea sephethe-phethe le ho netefatsa polokeho ea sephethephethe.
Mohlala, li-bits tse 100 tsa data li hloka ho feto-fetohabakeng safetisang.E fetole pele ho li-bits tse 200,.Ha lets'oao le amoheloa, leha ho na le bothata ka phetiso ea li-bits tse 100, data e nepahetseng e ntse e ka theoleloa.Ka bokhutšoanyane, ke ho eketsa redundancy pele ho modulation ho ntlafatsa ho tšepahala ha phetiso.Sena se bitsoa Phoso ea ka hare ea Phoso (FEC) mekhoeng ea COFDM.Mme ket ke parameter ea bohlokoa ea tsamaiso ea COFDM.
2.2.Tlhokomelo e bohlale ea bongaka
Lefapheng la tlhokomelo ea meriana e bohlale, tsamaiso ea phetisetso e se nang mohala ea COFDM e ka hlokomela mesebetsi e kang telemedicine, ho buuoa ka mohala ka mokhoa o phelang, le phetiso ea nako ea sebele ea litšoantšo tsa bongaka, ho ntlafatsa katleho le boleng ba litšebeletso tsa bongaka.
2.3.Motse o bohlale
Sebakeng sa toropo e bohlale, sistimi ea phetisetso ea waelese ea COFDM e ka sebelisoa ts'ireletsong ea litoropo, ho lekola tikoloho, mabone a bohlale, joalo-joalo ho ntlafatsa boemo bo bohlale ba taolo ea litoropo le ho ntlafatsa boleng ba bophelo ba baahi.
3.Melemo ea tsamaiso ea phetisetso ea waelese ea COFDM
Ha ho bapisoa lemahlale a mang a puisano a se nang mohala, Sistimi ea phetisetso ea waelese ea COFDM e na le melemo e latelang:
1. Tšebeliso e phahameng ea mahlaseli
Theknoloji ea COFDM e ka sebelisa lisebelisoa tsa bandwidth ka botlalo le ho ntlafatsa ts'ebeliso ea li-spectrum ka ho hasanya data holim'a li-subcarriers tse ngata bakeng sa phetiso.
2. Matla a matla a ho thibela mekhoa e mengata
Theknoloji ea COFDM e sebelisa orthogonality lipakeng tsa li-subcarriers tsa orthogonal ho arola ka nepo matšoao a litsela tse fapaneng pheletsong e amoheloang le ho fokotsa tšusumetso ea tšitiso ea litsela tse ngata.
3. Phetiso ea data e potlakileng
Ka ho sebelisa theknoloji ea ho feto-fetoha ha maemo a holimo le li-algorithms tsa likhoutu tse sebetsang hantle, sistimi ea phetisetso ea waelese ea COFDM e ka fihlella phetiso ea data ka lebelo le holimo.
4. Tšireletseho e phahameng
Theknoloji ea COFDM e sebelisa li-algorithms tsa encryption ho patala le ho fetisa data, ho sireletsa ka nepo ts'ireletso ea data e fetisoang.Sistimi ea phetisetso ea waelese ea COFDM e na le litebello tse pharaletseng tsa ts'ebeliso libakeng tse ngata, haholo-holo lits'ebetsong tse sebetsang ho lipalangoang tse bohlale, bongaka bo bohlale, litoropo tse bohlale le masimo a mang, moo e bonts'ang ka botlalo ts'ebetso ea eona, botsitso le ts'epo.Melemo ea eona e kang tšebeliso e phahameng ea mahlaseli, bokhoni bo matla ba ho thibela mekhoa e mengata, phetisetso ea data e potlakileng le ts'ireletso e phahameng li etsa hore mekhoa ea phetisetso ea waelese ea COFDM e be le bokhoni bo boholo ba tsoelo-pele.
Ka nts'etsopele e tsoelang pele ea mahlale le thekenoloji, re na le lebaka la ho lumela hore sistimi ea phetisetso ea waelese ea COFDM e tla bapala karolo ea bohlokoa le ho feta lefapheng la puisano la mehala nakong e tlang.
4.Qetello
E ipapisitse le theknoloji ea COFDM,IWAVE Communicationse hlahisitse letoto la lisebelisoa tsa phetisetso ea waelese, tseo le tsona li sebelisoang haholo mafapheng ana.Thepa e ntlafalitsoeng ke k'hamphani ea rona e shebana haholo lephetiso ya waelese ya sebaka se selelelevideo e nang le litlhaloso tse phahameng, haholo-holo phetisong ea li-wireless ea li-drones, e fanang ka boiketlo bo boholo bakeng sa lipalangoang tsa tšireletso ea lebopong, pholoso ea likoluoa tsa tšohanyetso, lipalangoang tse bohlale, joalo-joalo.
Nako ea poso: Sep-22-2023
