Ko te 2.4G WiFi e mahi ana i roto i te roopu 2.4GHz me te awhe auau whakahaere o 2400 ~ 2483.5MHz. Ko te paerewa matua e whai ake nei ko te paerewa IEEE802.11b / g / n i whakaritea e IEEE (Association of Electrical and Electronics Engineers). Anei enei paearu. taipitopito:
- Ko te IEEE802.11 he paerewa LAN ahokore i hangaia e IEEE.Ka whakamahia te nuinga ki te whakaoti i te uru ahokore ki nga kaiwhakamahi me nga tauranga kaiwhakamahi i te tari LAN me nga whatunga puni.He iti noa te ratonga ki te uru raraunga, me te reiti teitei o te 2Mb / s. Kua tawhito tenei hangarau na te mea he takarepa te IEEE802.11 i roto i te tere me te tawhiti tuku.
- Ko te paerewa IEEE802.11b, e mohiotia ana ko te hangarau pono ahokore, e whakamahi ana i te 2.4GHz kua whakaritea e te ao mo te toronga raupapa tika, me te 83.5MHz te whanui me te nui o te tere whakawhiti raraunga o te 11Mbps. Ko te awhe morahi tuku he 300 mita ki waho me te 100 mita i roto i te whare kaore he urunga o roto, koinei te kawa tuku ahokore e whakamahia nuitia ana inaianei.
- Ko te IEEE802.11g he paerewa ranu e urutau ana ki te paerewa 802.11b tuku iho me te whakarato i nga reiti whakawhiti raraunga o te 11Mbps ia rua i te 2.4GHz.Ka whakamahia e ia nga hangarau whakarei penei i te paihere rua-hongere, e whakapai ake ana i te bandwidth whakawhiti hongere ahokore ki te 108Mbps ka taea whakarato i te TCP / IP tuuturu i waenga i te 80 me te 90Mbps.
- Ka whakamahia e IEEE802.11n te hangarau MIMO (maha-i roto me te maha-waho) me te OFDM (orthogonal frequency division multiplexing), ka taea te whakapai ake i te tere o te tuku WLAN mai i te 54Mbps o naianei e whakaratohia ana e 802.11a me 802.11g ki 108Mbps, tae noa ki te 600Mbps. , a ka taea te tautoko i te reo me te tuku ataata kounga teitei.
| He Whakatauritenga o nga paearu 802.11b/g/n | |||
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| whakatupuranga tuarua | whakatupuranga tuatoru | Ko te reanga tuawha |
| paerewa | IEEE802.11b | IEEE802.11g | IEEE 802.11n |
| tikanga whakarereke | CCK | BPSK,QP SK,160AM, 64QAM,DBPSK,DQPSK, | BPSK,QPSK,160AM, 64QAM |
| Momo whakawaehere | DSSS | OFDM，DSSS | MIMO-OFDM |
| tere | 11Mbps | 54Mbps | 600Mbps |
| hongere hōkaiipurangi | 22MHz | 20MHz | 20,40MHz |
| Te ra o te whakaaetanga | 1999 | 2003 | 2009 |
| āhuatanga | Utu iti, auraki paerewa, hangarau me nga hua he pakeke | Te mana whanaunga iti kai, roa tawhiti tuku, kaha kaha uru, iti kapinga, reiti teitei | Raro-hototahi ki 11b / g i te wa e mahi ana i 2.4G |
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