FHSS, teknoloji yafupipafupi yodumphira kufalitsa sipekitiramu, pansi pa chikhalidwe cha kugwirizanitsa ndi nthawi imodzi, imavomereza zizindikiro zomwe zimaperekedwa ndi zonyamulira zopapatiza zamtundu wina (mawonekedwe enieniwa ali ndi mafupipafupi, etc.) pamapeto onse awiri.Kwa wolandila wopanda mtundu wina wake, chizindikiro chodumphadumpha chopangidwa ndi FHSS chimakhala phokoso lokhalokha ndipo sichingalandire gawo ili la chizindikirocho.
Chifukwa chiyani FHSS ikufunika?Zoonadi, deta yotumizira sidzakhala yaikulu kwambiri mkati mwa mndandanda womwe watchulidwa.Ngati nthawi yotumizira paketi imodzi ya data ikhoza kupitilira nthawi yayitali yokhalamo yololedwa ndi malamulo oyenera, ukadaulo wa FHSS udzagwiritsidwa ntchito.Kuti mutsegule maulendo odumphira pafupipafupi mu Lora, gwiritsani ntchito reg hopping period ndi registry hopping period kuti muwakhazikitse ku ziro zomwe sizinali ziro.Zotsatirazi zikufotokozera mfundo zachidziwitso za gawoli momveka bwino kudzera mu mfundoyi.
Mfundo Yofunika:Mfundo yogwira ntchito ya FHSS frequency hopping spread spectrum scheme ndi: kuti pafupipafupi kudumphadumpha kumafunika pagawo lililonse la paketi ya data ya Lora, zomwe zili mufiriji ziyenera kutumizidwa kudzera pa njira yodumphira pafupipafupi yokhazikitsidwa ndi oyang'anira a MCU.Ma frequency oti adumphidwe amayenera kutumizidwa molingana ndi tebulo lafunso.Kutumiza kwa data kukamalizidwa ndipo nthawi yodumphira pafupipafupi yodziwikiratu ikatha, chotumizira ndi wolandila amasintha kupita kunjira ina mumndandanda wodumphira pafupipafupi kuti apitilize kutumiza ndikulandila gawo lotsatira la paketi ya data.Nthawi yokhala munjira iliyonse imatsimikiziridwa ndi nthawi yodumphadumpha pafupipafupi, yomwe ndi kuchuluka kwautali wa chizindikirocho.
Njira yopatsiranandi kulandira kudzera mu kudumpha pafupipafupi kumayambira pa tchanelo 0. Mawu oyamba ndi mutu amafalitsidwa pa tchanelo 0 poyamba.Nthawi iliyonse paketi ya data ikatumizidwa, kuwerengera kwa tchanelo panjira yomwe ilipo (yomwe ili mu reg hopping Channel) kumawonjezeka, ndipo chizindikiro chosokoneza cha FHSS chimapangidwa kuti chikwaniritse kudumpha pafupipafupi.Ma frequency atsopano akuyenera kukhazikitsidwa mu nthawi yodumphadumpha pafupipafupi kuti zitsimikizire kuti ma frequency atsopanowo aphatikizidwa mu kadumphidwe kotsatirako.Yang'anani ndondomeko: yambani kulandila kwa FHSS pa tchanelo 0. Pambuyo poyang'ana chiyambi, wolandirayo ayambe ndondomeko yodumphira pamwambayi.Panthawiyi, ngati CRC ya mutuyo ili yolakwika, wolandirayo adzapempha njira 0 (packet retransmission mechanism) ndikuyambanso kuyang'ana zoyambira.
Kufotokozera pamwambapa pa mfundo ya frequency hopping spread spectrum communication (FHSS) yobweretsedwa kwa inuMalingaliro a kampani Shenzhen HDV Phoelectron Technology Co., Ltd.Tikukhulupirira kuti nkhaniyi ikuthandizani kuti muwonjezere chidziwitso chanu.Kupatula nkhaniyi ngati mukuyang'ana kampani yabwino yopanga zida zoyankhulirana zama fiber zomwe mungaganizirezambiri zaife.
