ʻIke

Ma ka ʻōnaehana kamaʻilio kikohoʻe, loaʻa i ka mea hoʻokipa ka huina o ka hōʻailona i hoʻouna ʻia a me ka walaʻau kani. ʻO ka hoʻokipa maikaʻi loa o nā hōʻailona kikohoʻe e pili ana i ka "maikaʻi" criterion me ka liʻiliʻi loa o ka hewa. ʻO nā hewa i manaʻo ʻia ma kēia mokuna ma muli o ka band-limited ...

Fig. 6-6 he kiʻikuhi poloka o ka ʻōnaehana hoʻoili hōʻailona baseband maʻamau. Hoʻokumu nui ʻia me kahi kānana hoʻouna (channel signal generator), kahi ala, kahi kānana hoʻokipa, a me kahi mea hoʻoholo koho. I mea e hōʻoia i ka hilinaʻi a me ka hoʻonohonoho pono o ...

ʻO kahi hōʻailona baseband kikohoʻe he ʻano nalu uila e hōʻike ana i ka ʻike kikohoʻe, hiki ke hōʻike ʻia e nā pae ʻokoʻa a i ʻole nā ​​pulses. Nui nā ʻano o nā hōʻailona baseband kikohoʻe (ma hope aku i kapa ʻia ʻo nā hōʻailona baseband). Hōʻike ke kiʻi 6-1 i kekahi mau ʻano nalu hōʻailona baseband, ...

Hiki ke hoʻokaʻawale ʻia nā hōʻailona hōʻoia i nā hōʻailona ikehu a me nā hōʻailona mana e like me ko lākou ikaika. Hiki ke hoʻokaʻawale ʻia nā hōʻailona mana i nā hōʻailona periodic a me nā hōʻailona aperiodic e like me ka manawa a i ʻole. He palena ʻole ka hōʻailona ikehu i ka amplitude a me ka lōʻihi, ʻo kona ikehu fi ...

Ke ʻoi aku ka kiʻekiʻe o ka hiki ke hoʻouna i kahi ala kino ma mua o ke koi ʻana o hoʻokahi hōʻailona, ​​hiki ke kaʻana like i ke ala e nā hōʻailona he nui. No ka laʻana, ʻo ka laina kumu o kahi ʻōnaehana kelepona he mau kaukani mau hōʻailona i hoʻouna ʻia ma hoʻokahi fiber optical. ʻO Multiplexing ka ʻenehana e hoʻoponopono ai ...

1) ʻO ka code AMI ʻO ka inoa piha o ka code AMI (Alternative Mark Inversion) ka code inversion mark alternate. blank) noho ʻaʻole hoʻololi. E laʻa: Code memo: 0 1 1 0 0 0 0 0 0 0 0 1 1 0 0 1 1… Code AMI: 0 -1 +1 0 0 0 0 0 0 0 -1 +1 0 0 -1 +1… Ke ʻano nalu pili i ke code AMI ...