I-FHSS, itekhnoloji ye-frequency hopping spread spectrum, phantsi kwemeko yongqamaniso kunye nexesha elinye, yamkela imiqondiso ehanjiswa ngabathwali bebhendi emxinwa yohlobo oluthile (olu hlobo luthile lune-frequency ethile, njl. njl.) kuzo zombini iziphelo. Kumamkeli ngaphandle kohlobo oluthile, isibonakaliso sokutsiba esiveliswe yi-FHSS yingxolo yempembelelo kuphela kuyo kwaye ayizukufumana le nxalenye yomqondiso.
Kutheni iFHSS ifuneka?Ngokuqinisekileyo, idatha yothumelo ayiyi kuba nkulu kuphela phakathi koluhlu oluchaziweyo. Ukuba ixesha lothumelo lwepakethi yedatha enye linokugqithisa ubuninzi bexesha lokuhlala kwesiteshi elivunyelwe yimimiselo efanelekileyo, iteknoloji ye-FHSS iya kusetyenziswa. Ukuvumela imowudi yokutsiba rhoqo eLora, sebenzisa ixesha lokutsiba-tsiba kunye neerejista zexesha lokutsiba rhoqo ukuziseta kumaxabiso angengo-zero. Oku kulandelayo kucacisa iingongoma zolwazi zale nxalenye ngokucacileyo ngomgaqo.
Umgaqo:Umgaqo osebenzayo we-FHSS ye-frequency hopping spread spectrum scheme kukuba: xa i-frequency hopping ifuneka kwinxalenye yepakethi yedatha ye-Lora nganye, umxholo kufuneka uthunyelwe nge-frequency hopping channel ebekwe ngabaphathi be-MCU. Ubuninzi bokutsiba bufuneka ukuba buthunyelwe ngokwetheyibhile yemibuzo ephindaphindwayo. Emva kokuba ugqithiso lwedatha lugqityiwe kwaye ixesha lokutsiba elixelwe kwangaphambili liphelile, umthumeli kunye nomamkelitshintshakwitshaneli elandelayo kuluhlu lokutsiba rhoqo oluchazwe kwangaphambili ukuqhubeka nokusasaza nokufumana indawo elandelayo yepakethi yedatha. Ixesha lokuhlala kulo naliphi na ijelo limiselwa yi-frequency hopping period, eyinani elipheleleyo lobude besimboli.
Inkqubo yokudluliselakunye nokufumana nge-frequency hopping iqala kwitshaneli 0. Intshayelelo kunye nesihloko zithunyelwa kwitshaneli 0 kuqala. Ngalo lonke ixesha i-packet yedatha ithunyelwa, ukufundwa kwekhawunta yetshaneli kwitshaneli ekhoyo (ebekwe kwi-reg hopping channel) iya kwanda, kwaye isignali ephazamisayo ye-FHSS yokutshintsha itshaneli iya kuveliswa ukufikelela kwi-frequency hopping. I-frequency entsha kufuneka isetwe kwi-frequency hopping period ukuqinisekisa ukuba i-frequency entsha iya kugqunywa kwi-frequency hopping elandelayo. Khangela inkqubo: qalisa ulwamkelo lwe-FHSS kwitshaneli 0. Emva kokujonga i-preamble, umamkeli uya kuqalisa inkqubo yokutsiba rhoqo engasentla. Ngeli xesha, ukuba i-CRC ye-header ayilunganga, umamkeli uya kucela ngokuzenzekelayo itshaneli 0 (i-packet retransmission mechanism) kwaye uqale ukukhangela i-preamble.
Inqaku elingasentla ingcaciso yomgaqo we-frequency hopping spread spectrum communication (FHSS) eziswe kuweShenzhen HDV Phoelectron Technology Co., Ltd. Ndiyathemba ukuba eli nqaku linokukunceda ukwandisa ulwazi lwakho. Ngaphandle kweli nqaku ukuba ujonge inkampani elungileyo yomenzi wezixhobo zonxibelelwano lwefiber onokuthi uyithathele ingqalelongathi.
