ʻO ka ʻōnaehana uila uila COFDMLoaʻa i nā manaʻo noiʻi ākea ma nā ʻano he nui, ʻoi loa i nā noi kūpono i ka lawe ʻana i ka naʻauao, nā lāʻau lapaʻau akamai, nā kūlanakauhale akamai, a me nā kula ʻē aʻe, kahi e hōʻike piha ai i kona pono, kūpaʻa, a me ka hilinaʻi.
ʻO kāna mau mea maikaʻi e like me ka hoʻohana ʻana i ka spectrum kiʻekiʻe, ka mana anti-multipath interference ikaika, ka hoʻouna ʻana i ka ʻikepili kiʻekiʻe a me ka palekana kiʻekiʻe e hana i nā ʻōnaehana uila uila COFDM i hiki ke hoʻomohala nui.
Me ka ulu wikiwiki o ka ʻepekema a me ka ʻenehana,ʻenehana kamaʻilio uilaua hoʻohana nui ʻia ma nā ʻano hana like ʻole.Ma waena o lākou, ua lilo ka ʻōnaehana uila uila COFDM (Coded Orthogonal Frequency Division Multiplexing) i ʻenehana hōkū ma ke kahua o nā kamaʻilio kelepona ma muli o kona hoʻohana pono ʻana i ka spectrum a me nā mana anti-multipath interference maikaʻi.
E ʻimi hohonu kēia ʻatikala i nā loina, nā hiʻohiʻona noiʻi a me nā pono o nā ʻōnaehana uila uila COFDM i hoʻohālikelike ʻia me nā ʻenehana ʻē aʻe.
1. Ke kumu o ka COFDM pūnaewele hoʻoili uila
Hoʻohana ka ʻōnaehana uila uila COFDM i ka coding channel, ka hoʻololi ʻana i ka hōʻailona a me nā ʻenehana hoʻoili ʻikepili e ʻike ai i ka lawe ʻana i ka ʻikepili kiʻi.ʻO ka mea mua, hoʻopaʻa a hoʻopaʻa inoa ka channel coding i ka ʻikepili kiʻi e hōʻemi i ka nui o ka ʻikepili i hoʻouna ʻia.A laila, hoʻololi ka modulation hōʻailona i ka ʻikepili i hoʻopaʻa ʻia ma luna o ka mea lawe i ka pahu alapine i kuhikuhi ʻia e ʻike i ka hoʻololi ʻana o ka spectrum o ka ʻikepili.Hoʻouna ʻia ka hōʻailona modulated i ka hopena loaʻa ma o ka lawe ʻana i ka ʻikepili no ka hoʻopau ʻana i ka hoʻoili uila ʻole o ka ʻikepili kiʻi.
2. Nā hiʻohiʻona noiʻi o ka ʻōnaehana uila uila COFDM
2.1.ʻO ka halihali naʻauao
Ma ke kahua o ka halihali naʻauao, hiki ke hoʻohana ʻia nā ʻōnaehana uila uila COFDM i ka nānā ʻana i ke kaʻa, ka nānā ʻana i ke kaʻa, ka hoʻokele hōʻailona o ke kaʻa, etc.
No ka laʻana, pono e hoʻololi ʻia nā 100 bits o ka ʻikepilino ka meahoʻounaana.E hoʻololi mua iā 200 bits,.Ke loaʻa ka hōʻailona, ʻoiai inā he pilikia me ka hoʻouna ʻana i nā bits 100, hiki ke hoʻemi ʻia ka ʻikepili pololei.I ka pōkole, ʻo ia ka hoʻohui ʻana i ka redundancy ma mua o ka modulation e hoʻomaikaʻi i ka hilinaʻi o ka hoʻouna ʻana.Kapa ʻia kēia ʻo Internal Error Correction (FEC) ma nā ʻōnaehana COFDM.A it he mea hoʻohālikelike koʻikoʻi o ka ʻōnaehana COFDM.
2.2.Mālama lapaʻau akamai
Ma ke kahua o ka mālama olakino akamai, hiki i ka COFDM pūnaewele hoʻouna uila ke hoʻomaopopo i nā hana e like me ke telemedicine, ka hoʻolaha ola ʻole o ke kelepona, a me ka hoʻouna ʻana i nā kiʻi olakino, hoʻomaikaʻi i ka maikaʻi a me ka maikaʻi o nā lawelawe lapaʻau.
2.3.Kulanakauhale akamai
Ma ke kahua o ke kūlanakauhale akamai, hiki ke hoʻohana ʻia ka ʻōnaehana uila uila COFDM i ka palekana o ke kūlanakauhale, ka nānā ʻana i ke kaiapuni, nā kukui akamai, a me nā mea ʻē aʻe e hoʻonui ai i ka pae naʻauao o ka hoʻokele kūlanakauhale a hoʻomaikaʻi i ka maikaʻi o ke ola o nā kamaʻāina.
3.Nā pōmaikaʻi o ka ʻōnaehana uila uila COFDM
Hoʻohālikelike ʻia menā ʻenehana kelepona ʻē aʻe, ʻO ka ʻōnaehana uila uila COFDM he mau pono kēia:
1. Hoʻohana kiʻekiʻe spectrum
Hiki i ka ʻenehana COFDM ke hoʻohana piha i nā kumuwaiwai bandwidth a hoʻomaikaʻi i ka hoʻohana ʻana i ka spectrum ma o ka hoʻolaha ʻana i ka ʻikepili ma luna o nā subcarrier he nui no ka hoʻouna ʻana.
2. ʻO ka hiki ke hoʻopilikia anti-multipath ikaika
Hoʻohana ka ʻenehana COFDM i ka orthogonality ma waena o nā subcarrier orthogonal e hoʻokaʻawale pono i nā hōʻailona o nā ala like ʻole ma ka hopena e loaʻa ai a hōʻemi i ka hopena o ka hoʻopili multipath.
3. Kiʻekiʻe-wikiwiki hoʻoiliʻikepili
Ma ka hoʻohana ʻana i ka ʻenehana modulation kiʻekiʻe a me nā algorithm coding maikaʻi, hiki i ka ʻōnaehana uila uila COFDM ke hoʻokō i ka hoʻoili ʻikepili kiʻekiʻe.
4. Palekana kiʻekiʻe
Hoʻohana ka ʻenehana COFDM i nā algorithm encryption e hoʻopili a hoʻouna i ka ʻikepili, e pale pono i ka palekana o ka ʻikepili i hoʻouna ʻia.Loaʻa i ka ʻōnaehana uila uila COFDM nā manaʻo noiʻi ākea ma nā ʻano he nui, ʻoi loa i nā noi kūpono i ka lawe ʻana i ka naʻauao, nā lāʻau lapaʻau akamai, nā kūlanakauhale akamai a me nā kula ʻē aʻe, kahi e hōʻike piha ai i kona pono, kūpaʻa a me ka hilinaʻi.ʻO kāna mau mea maikaʻi e like me ka hoʻohana ʻana i ka spectrum kiʻekiʻe, ka mana anti-multipath interference ikaika, ka hoʻouna ʻana i ka ʻikepili kiʻekiʻe a me ka palekana kiʻekiʻe e hana i nā ʻōnaehana uila uila COFDM i hiki ke hoʻomohala nui.
Me ka hoʻomau mau ʻana o ka ʻepekema a me ka ʻenehana, loaʻa iā mākou ke kumu e manaʻoʻiʻo ai e pāʻani nui ana ka ʻōnaehana uila uila COFDM i kahi kuleana koʻikoʻi ma ke kahua kamaʻilio uwea e hiki mai ana.
4. Ka hopena
Ma muli o ka ʻenehana COFDM,IWAVE kamaʻilioua hoʻomohala i kahi ʻano o nā lako uila uila, i hoʻohana nui ʻia i kēia mau kahua.ʻO nā mea hana i kūkulu ʻia e kā mākou hui e kālele nui ʻiaka hoʻouna ʻole ʻole o ka lōʻihiwikiō wehewehe kiʻekiʻe, ʻoi aku ka nui o ka hoʻouna ʻole ʻana o nā drones, e hāʻawi ana i ka ʻoluʻolu maikaʻi no nā mākaʻikaʻi pale kai, hoʻopakele pōʻino pilikia, ka lawe akamai, etc.
Ka manawa hoʻouna: Sep-22-2023
