Le DAB+ - Ngā mea katoa e hiahiatia ana kia mōhio koe !

Mā tēnei hangarau ka taea te pāoho i ngā pou maha (ngā tau) i runga i tētahi auautanga kua tukuna.
Mā tēnei hangarau ka taea te pāoho i ngā pou maha (ngā tau) i runga i tētahi auautanga kua tukuna.

DAB+

He acronym te DAB mō te Pāohotanga Ororongo Mamati, ehara i te pāohotanga tai
Ngā Whakaritenga M8 Mō ngā tūhono M8, he tikanga noa iho mō ngā putanga 3-, 4-, 6-, me ngā putanga 8-pin : 3-pin M8 ngā tūhono : Ka whakamahia nuitia ēnei tūhono ki te pūoko me te whakawhiti taupānga i roto i ngā tautuhinga mahi.
I te nuinga o te wā e whaiaho ana nga pine hai tautoko i nga tohu hiko me nga tohu whakahaere. 4-pin M8 ngā tūhono :
ritenga i whakaratoa e te reo irirangi FM. He āhua rite tonu ki te DTT (Digital Teterestrial Television) mō te reo irirangi, me te rerekētanga ka taea e ia te noho tahi me te reo irirangi tai
Ngā Whakaritenga M8 Mō ngā tūhono M8, he tikanga noa iho mō ngā putanga 3-, 4-, 6-, me ngā putanga 8-pin : 3-pin M8 ngā tūhono : Ka whakamahia nuitia ēnei tūhono ki te pūoko me te whakawhiti taupānga i roto i ngā tautuhinga mahi.
I te nuinga o te wā e whaiaho ana nga pine hai tautoko i nga tohu hiko me nga tohu whakahaere. 4-pin M8 ngā tūhono :
ritenga. Mā tēnei hangarau ka taea te pāoho i ngā pou maha (ngā tau) i runga i tētahi auautanga kua tukuna. Ko DAB+ e noho ana i te tāhei VHF III i waenganui i te 174 me te 223 MHz, i whakamahia i mua e te pouaka whakaata tai
Ngā Whakaritenga M8 Mō ngā tūhono M8, he tikanga noa iho mō ngā putanga 3-, 4-, 6-, me ngā putanga 8-pin : 3-pin M8 ngā tūhono : Ka whakamahia nuitia ēnei tūhono ki te pūoko me te whakawhiti taupānga i roto i ngā tautuhinga mahi.
I te nuinga o te wā e whaiaho ana nga pine hai tautoko i nga tohu hiko me nga tohu whakahaere. 4-pin M8 ngā tūhono :
ritenga.


Mai i ngā tau e 90 i Uropi, i pāngia e DAB tētahi kunenga hangarau i te tau 2006 me daB+ mā te whakauru i te waehere kōpeketanga HE-AAC V2, e tuku ana i te kounga oro tiketike ake. Heoi anō, kei te āhua tonu te kounga oro i runga i te ōwehenga kōpeketanga : ko te mea o raro, ka taea te purei i ētahi atu reo irirangi. I Wīwī, ko te ōwehenga kōpeketanga ko te 80 kbit/s, e ōrite ana ki tērā o FM.
DAB/DAB+ : ngā painga

I whakatauritetia ki te reo irirangi FM, he maha ngā painga o DAB+ :

I tērā taha, he iti iho te pai o te kaiwhiwhi i roto i nga whare; Nō reira e tika ana kia pupuri i tētahi teihana FM i roto i te whare.

Pūwhiwhi DAB+

Ka whakaaetia e te paerewa DAB te pāohotanga mamati o ngā hōtaka reo irirangi, mā ngā ngaru rererangi tere, aorangi rānei. I roto i ngā here kaiwhiwhi pai, he ōrite te kounga ki tērā o ngā pūpāpāho pūoro mamati, ngā pūpāpāho KK
He aha te pūngao tidal ? - He pūtake pūngao whakahou tēnei, nā te mea e mōhiotia ana ngā tai, ā, ka tīari tonu ki te wā e whakamahia ana e te Marama me te Rā tō rātou āhuatanga tō-ā-papa ki runga i te Whenua.
- He iti, kāore rānei he kohu kohu kati kati, he pokenga hau rānei.
ororongo rānei. Heoi anō, i runga anō i te ōwehenga kōpeketanga, he rerekē te kounga. Ko tētahi pūrongo a te CSA4 e tohu ana mā te ōwehenga kōpeketanga me te mokatere 80 kbit/s e tūmanakohia ana i Wīwī, e ōrite ana anake te kounga ki tērā o FM5.

Ka taea ia hōtaka te haere tahi me ngā mōhiohio pēnei i tōna ingoa, te tai
Ngā Whakaritenga M8 Mō ngā tūhono M8, he tikanga noa iho mō ngā putanga 3-, 4-, 6-, me ngā putanga 8-pin : 3-pin M8 ngā tūhono : Ka whakamahia nuitia ēnei tūhono ki te pūoko me te whakawhiti taupānga i roto i ngā tautuhinga mahi.
I te nuinga o te wā e whaiaho ana nga pine hai tautoko i nga tohu hiko me nga tohu whakahaere. 4-pin M8 ngā tūhono :
tara o ngā hōtaka, ngā waiata rānei e pāoho ana i runga i te hau, ā, ko ētahi atu atahanga me ngā raraunga. Me whakamahi tētahi pūwhiwhi tika : kāore e taea e ngā pūwhiwhi reo irirangi AM me te FM tūturu te wetewaehere i ngā raraunga mamati DAB5.

I whakatauritetia ki te reo irirangi FM, he maha ngā painga e tukuna ana e DAB ki ōna kaiwhakarongo :

  • ngaro ana te turituri papamuri ("hiss") nā te toharite o te kaiwhiwhi, te whakararuraru rānei

  • Āheitanga ki te roma i ētahi atu pou

  • Rārangi teihana aunoa katoa mā te pūwhiwhi

  • ko ngā raraunga e pā ana ki ngā papatono ka whai hua ake pea i ērā i tukuna e te RDS : ngā kuputuhi, ngā atahanga, ngā mōhiohio maha, ngā paetukutuku

  • He pakari ki ngā whakararuraru ina whakamahia i roto i te whāngai pūkoro (kara, tereina) tae atu ki te tere tiketike.


pūhihi reo irirangi mamati DAB+
pūhihi reo irirangi mamati DAB+

Whakarerenga :


  • whakawaehere ororongo :
    Ko te tikanga ka whakawaeheretia ngā ihirangi ororongo mā te whakamahi i ngā kotēkē pēnei i te MPEG-4 HE-AAC v2 (putanga Waehere Ororongo Arā Atu Anō Tiketike 2). Ka tukuna e tēnei kotēkē te kounga ororongo tino pai i ngā moka iti rawa, he tino pai mō te roma mamati.

  • Mahaxing :
    Ko te maha ko te tukanga o te paheko i ngā roma raraunga maha ki tētahi roma raraunga hiato kotahi. I te take o DAB+, ko te raraunga ororongo me ngā raraungameta pāhono (pēnei i te ingoa teihana, tai
    Ngā Whakaritenga M8 Mō ngā tūhono M8, he tikanga noa iho mō ngā putanga 3-, 4-, 6-, me ngā putanga 8-pin : 3-pin M8 ngā tūhono : Ka whakamahia nuitia ēnei tūhono ki te pūoko me te whakawhiti taupānga i roto i ngā tautuhinga mahi.
    I te nuinga o te wā e whaiaho ana nga pine hai tautoko i nga tohu hiko me nga tohu whakahaere. 4-pin M8 ngā tūhono :
    tara waiata, ērā atu mea) ka whakaritea tahitia ki tētahi roma raraunga kotahi.

  • E mawhiti ana :
    Ina mahax te raraunga ororongo me te raraungameta, ka mawhititia ki tētahi hōputu DAB+-specific mō te pāohotanga. Kei tēnei hōputu ko ngā mōhiohio wā, mōhiohio whakatika hapa, me ētahi atu raraunga e hiahiatia ana mō te tarenga tohu māia, tika hoki.

  • Whakakētanga :
    Kātahi ka whakawāteatia te tohu mawhiti kia tukuna atu ki runga i tētahi tāhei auau tauwhāiti. Ko te tikanga ka whakamahia e DAB+ te kōwaetanga o te Wāhanga ODM (Te Wāhanga Ororangi), e wehe ana i te tohu ki ngā pūroto maha. Mā tēnei e āhei ai te whakamahi i te hōkaiipurangi me te ātete pai ake ki te whakararuraru.

  • Whakawhitinga :
    Ina kōwaetia, ka tukuna te tohu e nga tare pāohotanga mā ngā pūhihi motuhake. E pāoho ana ēnei pūhihi i te tohu i tētahi wāhi pānuitanga tauwhāiti.

  • Whakahaeretanga Tāhei :
    Ka whakamahi te DAB+ i ngā pūkenga pēnei i te kōpeketanga hōkaiipurangi hihiri hei urutau ki ngā here hongere tarenga me te whakamōrahi i te tōtika momo. Mā tēnei ka taea te arotau i te whakamahinga o te tūāwhiotanga reo irirangi e wātea ana.
    He pakari ki ngā whakararuraru ina whakamahia i roto i te whāngai pūkoro (kara, tereina) tae atu ki te tere tiketike.


Reception :


  • Antenna :
    Hei whiwhi tohu DAB+, me whakarato tētahi pūwhiwhi ki tētahi pūhihi tika. Ka taea te tāpiri i tēnei pūhihi ki roto i te pūwhiwhi, i waho rānei, i runga anō i te pūrere. I hoahoatia kia whiwhi i ngā ngaru irirangi e pāohotia ana e daB+ ngā tare.

  • Kaiwhiwhi tohu :
    Ina tīpakohia e te pūhihi ngā tohu DAB+, ka tukatuka te pūwhiwhi ki te tango i te raraunga mamati. Ka taea te whakaihi i ngā pūwhiwhi DAB+ ngā pūrere tū-kotahi, ngā kōwae e tāpiritia ana ki ngā reo irirangi, ki ngā pūnaha kaiwhiwhi rānei i roto i ngā waka.

  • Whakaheketanga :
    Ko te whakahekenga ko te tukanga e tahuri ai te pūwhiwhi i te tohu reo irirangi i tīkina ake hei puka ka taea te whakamahi hei tango raraunga mamati. Mō DAB+, ko te tikanga ko tēnei ko te wetewete i te kōwaetanga o te Wāhanga ODM (Orthogonal Frequency Division Multiplexing) e whakamahia ana hei tarenga.

  • Rapu hapa me te whakatika :
    Ka mahia hoki e te pūwhiwhi te haurapa hapa me ngā mahi whakatika hei whakarite kia tika te whiwhi raraunga. Ka whakamahia ngā hangarau pēnei i te waeherenga anō (CRC) hei manatoko i te taparenga raraunga me te tika mō ngā hapa tarenga ka taea.

  • Wetewete raraunga :
    Ina whakahekea te raraunga mamati, ā, ka whakatikaina ngā hapa, ka taea e te pūwhiwhi te tango i te raraunga ororongo me te raraungameta pāhono mai i te roma raraunga DAB+. Kātahi ka tukatukatia tēnei raraunga kia hangaia anō hei oro, hei whakaatu rānei ki te kaiwhakamahi, e ai ki te momo pūwhiwhi me tōna taumahinga.

  • Tahuringa ki te tohu ororongo :
    Kātahi anō ka tahuritia te raraunga ororongo hei tohu ororongo tai
    Ngā Whakaritenga M8 Mō ngā tūhono M8, he tikanga noa iho mō ngā putanga 3-, 4-, 6-, me ngā putanga 8-pin : 3-pin M8 ngā tūhono : Ka whakamahia nuitia ēnei tūhono ki te pūoko me te whakawhiti taupānga i roto i ngā tautuhinga mahi.
    I te nuinga o te wā e whaiaho ana nga pine hai tautoko i nga tohu hiko me nga tohu whakahaere. 4-pin M8 ngā tūhono :
    ritenga kia purei anō e ngā tukuoro, ngā kawerongo rānei e hono ana ki te pūwhiwhi. Ka taea e tēnei tahuringa te whakauru i ngā hipanga pēnei i te wetewete waehere ororongo (pēnei i te MPEG-4 HE-AAC v2) me te tahuringa mamati-ki-te-analog (DAC).


Whakakētanga

E whā ngā aratau tarenga e tautuhia ana, kua tatauria mai i I ki IV :

- Aratau I, mō Band III, teretere
- Aratau II mō L-Band, teretere me te aorangi
- Aratau III mō ngā auautanga i raro iho i te 3 GHz, te teretere me te aorangi
- Aratau IV mō L-Band, teretere me te aorangi

Ko te kōwaetanga e whakamahia ana ko te DQPSK me te tukanga OFDM, e tuku ana i ngā āraitanga pai ki te whakararurarutanga me te whakararurarutanga ā-iwi i takea mai i ngā ara maha.

I te Aratau I, e 1,536 ngā kaikawe o te kōwaeTANGA ODM. Ko te wā whai painga o tētahi tohu OFDM ko te 1 ms, nā reira ko ia kaikawe OFDM e noho ana i tētahi tāhei whānui 1 kHz. Ko te mahax e noho ana i tētahi hōkaiipurangi katoa o te 1.536 MHz, kotahi te hauwhā o te hōkaiipurangi o tētahi pouaka whakaata tai
Ngā Whakaritenga M8 Mō ngā tūhono M8, he tikanga noa iho mō ngā putanga 3-, 4-, 6-, me ngā putanga 8-pin : 3-pin M8 ngā tūhono : Ka whakamahia nuitia ēnei tūhono ki te pūoko me te whakawhiti taupānga i roto i ngā tautuhinga mahi.
I te nuinga o te wā e whaiaho ana nga pine hai tautoko i nga tohu hiko me nga tohu whakahaere. 4-pin M8 ngā tūhono :
ritenga. E 246 ngā μs te wā ārai, nā reira ko te roanga katoa o te tohu ko te 1.246 ms. Ko te roanga o te wā ārai e whakatau ana i te tawhiti mōrahi i waenganui i ngā tare he wāhanga o te whatunga ōrite, i tēnei take tata ki te 74 km.

Whakahaere Ratonga

Kua whakawehea te tere e wātea ana i roto i tētahi taurea ki "ngā ratonga" o ngā momo maha :

- ngā ratonga matua : ko ngā pou reo irirangi matua;
- Ngā ratonga tuarua : hei tauira, he kōrero hākinakina tāpiri;
- Ngā ratonga raraunga : kaiārahi papatono, ngā whakaatakiriata kua tukutahitia ki ngā whakaaturanga, ngā whārangi tukutuku me ngā atahanga, ērā atu mea.

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