Pono o DVB-T

Hoʻohana ka maʻamau DVB-T i nā ʻenehana modulation kūikawā a me nā wā kiaʻi, i hui pū ʻia me ka hoʻololi Fourier wikiwiki, e hāʻawi i ka pale leo kiʻekiʻe loa. Hiki iā ʻoe ke hoʻololi i ke kiʻekiʻe o ka palekana, ka nui o ka hoʻouna ʻana a me ka hoʻoponopono hewa. ʻAe kēia mau mea hiki ke hana i nā ʻōnaehana kīwī kikohoʻe terrestrial i kūpono no kēlā me kēia wahi a i ʻole ke kūlanakauhale.
Ma muli o ka hoʻololi wikiwiki ʻana o Fourier, aia 6817 mau mea lawe liʻiliʻi ma ke ʻano 8k a me 1705 mau mea lawe ma ke ʻano 2k ma ka puka o ka transmitter. Hoʻopiʻi ʻia kekahi helu o nā mea lawe ma ka wahi e loaʻa ai ma muli o ke keakea ʻana, ʻo nā mea i koe e hoʻololi i ka hoʻololi Fourier inverse ma ka mea hoʻokipa, a loaʻa kahi hōʻailona unstorted ma ka puka.
ʻO ka pōmaikaʻi o DVB-T ʻo ia ka hiki ke loaʻa i nā papahana TV i ka hihia o nā ʻāpana overlapping o ka hoʻokipa hilinaʻi ʻana o kekahi mau kikowaena kīwī e hana ana ma ka alapine like. Hana ʻia ka hoʻonohonoho ʻana o nā telecenters e like me ke ʻano alapine o nā satellite i loaʻa. ʻOiaʻiʻo, pono e hoʻouna i ka pūʻolo papahana i ka manawa like a me ka like nā kikowaena telecenters a pau e hoʻouna ana i nā papahana aupuni 6-7 ma kahi mea lawe hoʻokahi.
Hiki iā ia, ma ka hoʻololi ʻana i nā ʻāpana o ka hōʻailona i hoʻokuʻu ʻia, hoʻoponopono i nā hewa a me nā ʻano modulation, e loaʻa i kahi ākea ākea o ka hoʻouna ʻana mai 4.98 a 31.67 Mbps i ka 8 MHz frequency band.
Inā mākou e nīnau iā mākou iho i nā koi haʻahaʻa loa no ka maikaʻi o ka hoʻouna ʻana (2 Mbps), a laila pili kēia me 2-16 mau polokalamu kīwī ma hoʻokahi alapine lawe. A i ʻole ka hapalua o ka nui (a hiki i nā polokalamu 8) ma 4 Mbps me ka maikaʻi maikaʻi. ʻAʻole like me ATSC, ʻaʻole pili nā papahana TV i hoʻouna ʻia me ke ʻano o nā hōʻailona, a ʻo nā ʻano kīwī maʻamau a me ka wehewehe kiʻekiʻe me ka decomposition laina 525 a me 625 hiki ke loaʻa i loko o kahi kahawai lawe.

Pono o DVB-T
Pono o DVB-T
Pono o DVB-T
Pono o DVB-T Pono o DVB-T Pono o DVB-T



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January 27, 2023 03:32:05 +0200 GMT
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