I-FHSS, ubuchwepheshe be-frequency hopping spread spectrum, ngaphansi kwesimo sokuvumelanisa kanye nesikhathi esisodwa, yamukela amasignali adluliswa abathwali bebhendi emincane yohlobo oluthile (leli fomu elithile linefrikhwensi ethile, njll.) kuzo zombili iziphetho. Kumamukeli ongenalo uhlobo oluthile, isignali yokugxuma ekhiqizwe i-FHSS iwumsindo oshubile kuphela kuyo futhi ngeke yamukele le ngxenye yesiginali.
Kungani i-FHSS idingeka?Yiqiniso, idatha yokudlulisela ngeke ibe nkulu kangako kuphela phakathi kwebanga elishiwo. Uma isikhathi sokudluliswa kwephakethe ledatha elilodwa singase seqe isilinganiso esiphezulu sesikhathi sokuhlala sesiteshi esivunyelwe yimithetho efanele, kuzosetshenziswa ubuchwepheshe be-FHSS. Ukuze unike amandla imodi ye-frequency hopping ku-Lora, sebenzisa inkathi yokugxuma kanye namarejista enkathi yokugxuma imvamisa ukuze uwasethele kumanani angewona aziro. Okulandelayo kuchaza amaphuzu olwazi ale ngxenye ngokucacile ngomgomo.
Isimiso:Umgomo wokusebenza we-FHSS frequency hopping spread spectrum scheme uthi: uma kudingeka i-frequency hopping engxenyeni yephakethe ngalinye ledatha ye-Lora, okuqukethwe kudinga ukuthunyelwa ngesiteshi se-frequency hopping esisethwe abaphathi be-MCU. I-frequency okufanele igxunywe iyadingeka ukuthi ithunyelwe ngokuya ngethebula lemibuzo yefrikhwensi. Ngemuva kokuthi ukudluliswa kwedatha sekuqediwe kanye nesikhathi esinqunyiwe sokugxuma amafrikhwensi sesiphelile, isidlulisi kanye nomamukelishintshaesiteshini esilandelayo kuhlu oluchazwe ngaphambilini lokweqa imvamisa ukuze uqhubeke nokudlulisa nokwamukela ingxenye elandelayo yephakethe ledatha. Isikhathi sokuhlala kunoma isiphi isiteshi sinqunywa isikhathi sokugxuma okuyimvamisa, okuyinani eliphindwe kabili lobude bophawu.
Inqubo yokudlulisafuthi ukwamukela ngokugxuma-gxuma kuqala kushaneli 0. Isendlalelo nesihloko kudluliselwa kusiteshi 0 kuqala. Ngaso sonke isikhathi lapho kuthunyelwa iphakethe ledatha, ukufundwa kwekhawunta yesiteshi esiteshini samanje (etholakala esiteshini sokugxuma-gxuma) kuzokwanda, futhi isignali ephazamisayo yokuguqula ishaneli ye-FHSS izokhiqizwa ukuze kuzuzwe i-frequency jumping. Ifrikhwensi entsha kufanele isethwe enkathini yokugxuma amafrikhwensi ukuze kuqinisekiswe ukuthi ifrikhwensi entsha izofakwa ekuxhumeni kwamafrikhwensi okulandelayo. Inqubo yokuhlola: qala ukwamukela kwe-FHSS esiteshini 0. Ngemva kokuhlola isethulo, umamukeli uzoqala inqubo yokugxuma okuyimvamisa engenhla. Ngalesi sikhathi, uma i-CRC kanhlokweni ingalungile, umamukeli uzocela ngokuzenzakalelayo isiteshi 0 (indlela yokudlulisa iphakethe) futhi aqale kabusha ukuhlola isethulo.
Incazelo ye-athikili engenhla yomgomo we-frequency hopping spread spectrum communication (FHSS) elethwe kuwe nguI-Shenzhen HDV Phoelectron Technology Co., Ltd. Ngethemba ukuthi lesi sihloko singakusiza ukukhulisa ulwazi lwakho. Ngaphandle kwalesi sihloko uma ufuna inkampani enhle yabakhiqizi bemishini yokuxhumana ye-fiber ongase uyicabangeleMayelana NATHI.
