Dab tsi yog uplink thiab downlink zaus hauv kev sib txuas lus mobile?
Dab tsi yog uplink thiab downlink zaus hauv kev sib txuas lus mobile?

Video: Dab tsi yog uplink thiab downlink zaus hauv kev sib txuas lus mobile?

Video: Dab tsi yog uplink thiab downlink zaus hauv kev sib txuas lus mobile?
Video: Tiny11: Windows 11 entmüllt und alles entfernt – Performance Test! 2024, Kaum ib hlis
Anonim

uplink - teeb liab ntawm satellite rov qab mus rau earth.mobcomm: downlink : teeb liab los ntawm chaw nres tsheb hauv paus rau txawb chaw nres tsheb (cellphone) uplink : signal los ntawm txawb chaw nres tsheb (cellphone) mus rau chaw nres tsheb hauv paus.

Khaws qhov no hauv kev pom, dab tsi yog uplink thiab downlink hauv kev sib txuas lus mobile?

Cov kev sib txuas lus mus los ntawm satellite toground hu ua downlink , thiab thaum nws mus los ntawm av mus rau ib tug satellite nws yog hu ua uplink . Thaum ib uplink yog tau txais los ntawm lub spacecraft tib lub sij hawm a downlink tau txais los ntawm Ntiaj Teb, lub kev sib txuas lus yog hu ua ob txoj kev.

Ib tug kuj yuav nug, dab tsi yog qhov uplink thiab downlink zaus hauv GSM? GSM -900 siv 890 - 915 MHz xa cov ntaub ntawv los ntawm Chaw Nres Tsheb Txawb mus rau Base Transceiver Station ( uplink ) thiab 935 - 960 MHz rau lwm cov kev taw qhia ( downlink ), muab 124 RF channel (channel naj npawb 1 txog 124) spaced ntawm 200 kHz. Duplex sib nrug ntawm 45 MHz yog siv.

Ib yam li ntawd, koj tuaj yeem nug, dab tsi yog txhais los ntawm uplink thiab downlink zaus?

Cov uplink zaus yog cov zaus uas yog siv rau kev xa cov teeb liab ntawm lub ntiaj teb chaw nres tsheb mus rau satellite. Cov downlink zaus yog cov zaus uas yog siv rau kev xa cov teeb liab ntawm lub satellite mus rau lub ntiaj teb chaw nres tsheb receiver.

Dab tsi yog qhov zaus siv los ntawm kev sib txuas lus mobile?

Hauv North America, GSM ua haujlwm ntawm thawj kev sib txuas lus mobile bands 850 MHz thiab 1900 MHz.

Pom zoo: