PHY, txheej txheej ntawm lub cev ntawm IEEE 802.11, muaj keeb kwm hauv qab no ntawm kev txhim kho thev naus laus zis thiab cov qauv kev ua haujlwm:
IEEE 802 (1997)
Modulation technology: infrared kis ntawm FHSS thiab DSSS
Kev khiav hauj lwm zaus band: kev khiav hauj lwm nyob rau hauv 2.4GHz zaus band (2.42.4835GHz, 83.5MHZ nyob rau hauv tag nrho, muab faib ua 13 raws (5MHZ ntawm ib sab channel), txhua channel accounting rau 22MHz. Thaum cov channel siv ib txhij, muaj peb yam tsis- sib tshooj [1 6 11 lossis 2 7 12 lossis 3 8 13])
Kev sib kis tus nqi: Lub sijhawm no, tus nqi sib kis tau qeeb thiab cov ntaub ntawv kuj tseem txwv.Nws tsuas yog siv tau rau cov kev pabcuam nkag mus rau cov ntaub ntawv, thiab qhov siab tshaj plaws kis tau tus mob yog 2 Mbps.
Compatibility: tsis sib xws.
IEEE 802.11a (1999)
Modulation thev naus laus zis: tau tshaj tawm (OFDM) thev naus laus zis, uas yog orthogonal zaus faib multiplexing (OFDM).
Kev khiav hauj lwm zaus band: lub sij hawm no, nws ua hauj lwm nyob rau hauv lub 5.8GHz zaus band (5.725G5.85GHz, 125MHz nyob rau hauv tag nrho, muab faib ua tsib raws, txhua channel tso nyiaj rau 20MHz, thiab nyob ib sab channel tsis sib tshooj, uas yog, thaum. cov channel yog siv tib lub sijhawm, tsib txoj kab no tsis sib tshooj).
Kev sib kis tus nqi: thaum tus nqi sib kis tau nce, nws yog 54, 48, 36, 24, 18, 12, 9, thiab 6. Cov chav nyob hauv qhov ntau yog Mbps.
Compatibility: tsis sib xws.
IEEE 802.11b (1999)
Modulation technology: nthuav IEEE 802.11 DSSS hom thiab txais yuav CCK kev hloov kho
Ua haujlwm zaus band: 2.4GHz
Kev sib kis tus nqi: txhawb cov nqi sib txawv ntawm 11 Mbps, 4.5 Mbps, 2 Mbps, thiab 1 Mbps
Compatibility: Pib downward compatibility nrog IEEE 802.11
IEEE 802.11g (2003)
Modulation technology: qhia orthogonal zaus division multiplexing (OFDM) technology
Ua haujlwm zaus band: 2.4GHz
Kev sib kis tus nqi: paub qhov siab tshaj plaws cov ntaub ntawv kis tus nqi ntawm 54 Mbps
Compatibility: Tau tshaj IEEE 802.11 / IEEE 802.11b
IEEE 802.11n (2009)
Modulation technology: qhia orthogonal zaus division multiplexing (OFDM) technology + ntau yam tswv yim / ntau cov zis (MIMO) technologies
Ua haujlwm zaus: 2.4G lossis 5.8GHz
Kev sib kis tus nqi: cov ntaub ntawv kis ceev tuaj yeem ncav cuag 300 ~ 600Mbps
Compatibility: Tau tshaj IEEE 802.11 / IEEE 802.11b / IEEE 802.11a
Cov saum toj no yog cov txheej txheem keeb kwm ntawm IEEE802 raws tu qauv, uas tsis yooj yim nrhiav.Cov txheej txheem no suav nrog 2.4G thiab 5G zaus bands.Tsis tas li ntawd, nrog kev txhim kho keeb kwm thiab kev hloov kho tas li ntawm cov txheej txheem, tus nqi tau nce siab.Tam sim no, qhov theoretical siab tshaj plaws ceev ntawm 2.4G band tuaj yeem ncav cuag 300Mbps, thiab qhov siab tshaj plaws ceev ceev ntawm 5G band tuaj yeem ncav cuag 866Mbps.
Cov ntsiab lus: Cov kev cai txhawb nqa los ntawm 2.4GWiFi yog: 11, 11b, 11g, thiab 11n.
Cov txheej txheem txhawb nqa los ntawm 5GWiFi yog 11a, 11n, thiab 11ac.
Cov saum toj no yog cov lus piav qhia ntawm WLAN Lub Cev Txheej Txheem PHY coj los rau koj los ntawm Shenzhen Haidiwei Optoelectronics Technology Co., Ltd. Shenzhen Haidiwei Optoelectronics Technology Co., Ltd. yog cov chaw tsim khoom tshwj xeeb hauv cov khoom siv kho qhov muagcov khoom