Zaus Band faib ntawm Beidou Navigation System

Lub Beidou Navigation Satellite System (BDS, tseem hu ua COMPASS, Suav transliteration: BeiDou) yog lub ntiaj teb satellite navigation system nws tus kheej tsim los ntawm Tuam Tshoj. Nws yog qhov thib peb paub tab satellite navigation system tom qab GPS thiab GLONASS.

Beidou Generation I

Kev faib tawm zaus ntawm Beidou Generation I feem ntau suav nrog Xov Tooj Cua Kev Txiav Txim Siab Satellite Service (RDSS) bands, tshwj xeeb muab faib ua uplink thiab downlink bands:
a) Uplink Band: Cov band no yog siv rau cov neeg siv khoom siv los xa cov teeb liab mus rau satellites, nrog ntau zaus ntawm 1610MHz txog 1626.5MHz, koom nrog L-band. Qhov kev tsim band no tso cai rau cov cuab yeej hauv av xa cov lus thov thiab lwm yam ntaub ntawv cuam tshuam rau satellites.
b) Downlink Band: Cov band no yog siv rau satellites xa cov teeb liab rau cov neeg siv khoom siv, nrog ntau zaus ntawm 2483.5MHz txog 2500MHz, koom nrog S-band. Qhov kev tsim band no tso cai rau cov satellites los muab cov ntaub ntawv qhia txog kev taw qhia, cov ntaub ntawv qhia, thiab lwm yam kev pabcuam tsim nyog rau cov khoom siv hauv av.
Nws yog ib qho tseem ceeb uas qhov kev faib tawm zaus ntawm Beidou Generation I tau tsim los ua kom tau raws li cov kev xav tau thiab kev xav tau qhov tseeb ntawm lub sijhawm ntawd. Nrog rau kev txhim kho thev naus laus zis thiab kev hloov kho txuas ntxiv mus rau Beidou system, tiam tom ntej, suav nrog Beidou Generation II thiab III, tau txais kev sib txawv ntawm cov zaus sib txawv thiab cov teeb liab hloov kho txoj hauv kev los muab cov kev txiav txim siab dua thiab txhim khu kev qha thiab kev pab cuam qhov chaw.

Beidou Generation II

Beidou Generation II, thib ob-tiam system ntawm Beidou Navigation Satellite System (BDS), yog lub ntiaj teb no siv tau satellite navigation system ntawm nws tus kheej tsim los ntawm Tuam Tshoj. Ua raws li lub hauv paus ntawm Beidou Generation I, nws lub hom phiaj los muab kev ua haujlwm siab, kev ntseeg siab ntawm qhov chaw, kev taw qhia, thiab sijhawm (PNT) cov kev pabcuam rau cov neeg siv thoob ntiaj teb. Lub kaw lus muaj peb ntu: chaw, hauv av, thiab tus neeg siv. Cov ntu ntu suav nrog ntau lub satellite navigation, ntu hauv av suav nrog cov chaw tswj hwm tus tswv, chaw saib xyuas, thiab chaw nres tsheb uplink, thaum cov neeg siv ntu suav nrog ntau yam khoom tau txais.
Kev faib tawm zaus ntawm Beidou Generation II feem ntau suav nrog peb pawg: B1, B2, thiab B3, nrog rau qhov tshwj xeeb raws li hauv qab no:
a) B1 Band: Ntau zaus ntawm 1561.098MHz ± 2.046MHz, feem ntau yog siv rau pej xeem navigation thiab muab tso rau kev pabcuam.
b) B2 Band: Ntau zaus ntawm 1207.52MHz ± 2.046MHz, kuj tseem siv rau cov kev pabcuam pej xeem, ua haujlwm nrog B1 band los muab cov peev xwm muab ob npaug rau kev txhim kho qhov tseeb.
c) B3 Band: Ntau zaus ntawm 1268.52MHz ± 10.23MHz, feem ntau yog siv rau kev ua tub rog, muab qhov tseeb ntawm qhov chaw siab dua thiab muaj peev xwm tiv thaiv kev cuam tshuam.

Beidou Generation III

Lub thib peb tiam Beidou Navigation System, tseem hu ua Beidou-3 Ntiaj Teb Navigation Satellite System, yog lub ntiaj teb nkag mus rau satellite navigation system ntawm nws tus kheej tsim thiab ua haujlwm los ntawm Tuam Tshoj. Nws tau ua tiav qhov kev vam meej los ntawm cheeb tsam mus rau thoob ntiaj teb kev pab them nqi, muab kev ua haujlwm siab, kev tso siab siab, kev taw qhia, thiab kev pabcuam sijhawm rau cov neeg siv thoob ntiaj teb. Beidou-3 muaj ntau qhov kev pabcuam qhib thoob plaws B1, B2, thiab B3 bands, suav nrog B1I, B1C, B2a, B2b, thiab B3I. Cov kev faib zaus ntawm cov teeb liab no yog raws li hauv qab no:
a) B1 Band: B1I: ​​Nruab nrab zaus ntawm 1561.098MHz ± 2.046MHz, lub teeb liab yooj yim siv dav hauv ntau yam khoom siv navigation; B1C: Nruab nrab zaus ntawm 1575.420MHz ± 16MHz, thawj lub teeb liab txhawb Beidou-3 M / I satellites thiab txhawb nqa los ntawm cov tshiab, high-end mobile terminals.
b) B2 Band: B2a: Nruab nrab zaus ntawm 1176.450MHz ± 10.23MHz, tseem yog thawj lub teeb liab txhawb Beidou-3 M / I satellites thiab muaj nyob rau ntawm cov tshiab, high-end mobile terminals; B2b: Nruab nrab zaus ntawm 1207.140MHz ± 10.23MHz, txhawb Beidou-3 M/I satellites tab sis tsuas yog muaj nyob rau ntawm xaiv high-end mobile terminals.
c) B3 Band: B3I: Nruab nrab zaus ntawm 1268.520MHz ± 10.23MHz, txhawb nqa los ntawm txhua lub satellites hauv Beidou Generation II thiab III, nrog kev txhawb nqa zoo los ntawm ntau hom, ntau zaus modules.

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