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    Whakataki ki te Hapa Vector Magnitude (EVM)

    Wā whakairinga: Sep-21-2022

    EVM: whakapoto o te Hapa Vector Magnitude, ko te tikanga o te kaha kaha o te vector hapa.
    Ko te tuku o te roopu auau tohu mamati ko te whakarereke i te tohu paanui i te pito tuku, tukuna atu ki te raina mo te tuku, katahi ka whakahekehia i te pito whiwhi ki te whakaora i te tohu turanga taketake.I roto i tenei mahi, ko te hapa whakarereketanga i puta mai i te kaitahuri, te kounga o nga taputapu RF, te haruru o te wahanga-rakau (PLL), te paheketanga o te PA, te haruru waiariki, me te hoahoa modulator ka whakaputa i nga vector hapa (EVM).Ko te EVM ka whai paanga nui ki te kounga o nga tohu whakarereke, na ko te kaupapa whakamatautau kounga whakarereke tetahi o nga waahanga nui o te whakamatautau RF.

    Hapa Vector Magnitude hanganga kauwhata

    E tohu ana a EVM ki te tata i waenga i te waahanga IQ i hangaia i te wa e whakahekehia ana e te kaiwhakawhiti te tohu me te waahanga tohu pai.He tohu mo te kounga o te tohu whakahuri.Ko te nuinga o nga wa, ko te vector hapa e pa ana ki nga kaupapa whakarereke M-ary I/Q penei i te QPSK, a ka whakaatuhia e te hoahoa "whetu" I/Q o nga tohu demodulation.

    Ko te kaha kaha o te vector hapa [EVM] kua tautuhia ko te tauwehenga o te uara tapawha tikanga pakiaka o te kaha toharite o te tohu vector hapa ki te uara tapawha tikanga o te kaha toharite o te tohu pai me te whakaatu hei ōrau.Ko te iti ake o te EVM, ko te pai ake o te tohu tohu.
    Ko te kaha kaha o te vector hapa ko te ine i waenga i te ahua ngaru ine me te ahua ngaru kua oti te whakarereke.Ko nga ahuatanga ngaru e rua he 1.28 MHz me te 0.22 te whakarea takahuri.Ko nga ahua ngaru e rua ka whakarerekehia ma te kowhiri i te auau, te wahanga tino, te kaha kaha, me te wa karaka maramara hei whakaiti i te vector hapa.Ko te waahi ine he mokamoka kotahi.Ko te kaha kaha o te vector hapa iti me kaua e nui ake i te 17.5%.
     
    Ko te kaupapa o te whakamatautau kia kite mena he tika te ahua ngaru i mahia e te kaiwhakawhiti mo te kaiwhiwhi ki te whiwhi i nga mahi powhiri i tohua.
    He kupu whakataki tenei ki te EVM mai i a Shenzhen HDV Optoelectronic Technology Co., Ltd., he kamupene whakawhitiwhiti matakite e hanga hua korero.Nau mai haere maikorero



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