Kua tutuki i tētahi rōpū rangahau mai i te Network Research Institute of Japan's National Institute of Information and Communications Technology (NICT) tētahi rekoata hou o te ao mō te whānui o te hononga, arā, 1.53 Pbit/s i runga i tētahi muka whatu paerewa. Ko te tikanga tēnei ka taea te uru katoa o te ipurangi ki roto.
I puta anō tētahi putanga hou i ngā wiki e rua kua pahure ake nei: i tutukihia he whānui o te 1.84 Pbit/s mā te whakamahi i tētahi taiaho kotahi me tētahi maramara whatu kotahi, he uara teitei ake i tērā i tutukihia e ngā ICT, engari ko te raruraru he whakamātautau tonu. Kei roto i te wāhanga hoahoa ngā maramara photonic; nō reira, ka taea te whakatinana wawe i tēnei rangahau ICT.
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Hangarau whakarea: whakatutuki i te whānuitanga rekoata o te 1.53 Pbit/s
I tutuki i ngā kairangahau te whānuitanga o te raraunga o te 1.53 Pbit/s mā te whakakōwae i ngā mōhiohio puta noa i te 55 ngā auautanga whatu rerekē (he tikanga e mōhiotia ana ko te multiplexing). He nui te whānuitanga o te raraunga hei kawe i ngā waka ipurangi katoa o te ao (e kiia ana he iti iho i te 1 Pbit/s) mā roto i tētahi taura muka whatu kotahi—he miriona ngā wā he nui ake te whai huatanga i te hononga gigabit (i te pai rawa atu) o te tangata noa.
Ka mahi te hangarau mā te whakamahi i ngā auau mārama rerekē puta noa i te whānuitanga. Nā te mea he auau motuhake tō ia "tae" i roto i te whānuitanga (e kitea ana, e kore e kitea), he rerekē ki ngā auau katoa, ka taea e ia te kawe i tana ake rerenga mōhiohio motuhake. I tutuki i ngā kairangahau te pai o te whānuitanga o te 332 bits/s/Hz (bits ia hekona mō ia Hertz), e toru ngā wā teitei ake i tā rātou ngana pai rawa atu i te tau 2019, i tutuki ai te pai o te whānuitanga o te 105 bits/s/Hz.
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Tatūnga whakamātautau: Te tuku mōhiohio C-band i ngā roangaru rerekē 184
I angitu te tuku a ngā kairangahau i ngā mōhiohio C-band puta noa i ngā roangaru rerekē e 184: ka whakamahia ēnei auau motuhake, kāore e taupatupatu hei tuku mōhiohio i te wā kotahi i roto i te taura muka whatu. Ka whakarerekētia te mārama kia tukuna he 55 awa (tauira) raraunga motuhake i mua i te tukunga mā te taura muka whatu. Kia whakarerekētia (pērā i te nuinga o ngā taura muka whatu e whakamahia ana i tēnei wā), me whai matua karāhe hei kawe i ngā raraunga katoa. I te tukunga o ngā raraunga (e kapi ana i te 184 roangaru me te 55 aratau), ka wetewetehia e te kaiwhiwhi ngā roangaru me ngā aratau rerekē hei kohikohi i ana raraunga. I roto i te whakamātautau, i whakaritea te tawhiti i waenga i te tuku me te kaiwhiwhi ki te 25.9 km.
① Pūtake heru whatu: 184 ngā kaikawe e hangaia ana i roto i tētahi pūtake heru whatu. ② Te whakarerekētanga tohu: Ka whakarerekētia te kaikawe ki ngā tohu QAM 16 me te whakapūtātanga maha. ③ Te whakaputa tohu whakarara: Ka wehea ngā tohu mō ia aratau, ā, ka whakamahia ngā whakaroa ara hei whakatauira i ngā awa raraunga motuhake. ④ Te whakapūtātanga aratau: Ka hurihia ia tohu ki tētahi aratau ā-wāhi rerekē ka tukuna ki tētahi muka aratau-55. ⑤ Muka aratau-55: Ka horapa te tohu i roto i tētahi muka aratau-55 25.9 kiromita te roa. ⑥ Te whakapūtātanga aratau: I te kaiwhiwhi, ka wehea te tohu ki ia aratau ā-wāhi ka hurihia ki te aratau taketake. ⑦ Te kaiwhiwhi whakarara tere-tiketike: Ka whakapūtātia te tohu whakapūtātanga aratau-ngaru e tētahi tātari ka hurihia hei tohu hiko e tētahi kaiwhiwhi honohono whakarara. ⑧ Te tukatuka tohu tuimotu. Te tukatuka MIMO hei whakakore i te pokanoa tohu i te wā e horapa ana te muka.
E whakaatu ana ngā hua o te whakamātautau ahakoa he paku heke te tere raraunga i te pito roa o te roanga ngaru o te roopu C (tata ki te 1565 nm), ka whiwhihia he tere raraunga pumau, tata rite tonu hoki i roto i ētahi atu rohe roanga ngaru, ā, ka eke ki te tapeke o te 1.53 Pbit/s i muri i te whakatikatika hapa.
Wā tuku: Whiringa-ā-rangi 18-2022
