Beidou Navigation Satellite System (BDS, yomwe imadziwikanso kuti COMPASS, matanthauzo a Chitchaina: BeiDou) ndi makina apadziko lonse oyenda pasatana opangidwa ndi China. Ndi njira yachitatu yoyendera ma satellite okhwima kutsatira GPS ndi GLONASS.
Beidou Generation I
Kugawidwa kwa ma frequency band a Beidou Generation I makamaka kumakhudza magulu a Radio Determination Satellite Service (RDSS), omwe amagawidwa m'magulu a uplink ndi downlink:
a) Uplink Band: Gululi limagwiritsidwa ntchito ngati zida zotumizira ma satelayiti, okhala ndi ma frequency a 1610MHz mpaka 1626.5MHz, a L-band. Mapangidwe a bandiwa amalola zida zapansi kuti zitumize zopempha zapamalo ndi zidziwitso zina zofunika ku ma satellite.
b) Gulu la Downlink: Gululi limagwiritsidwa ntchito ngati ma satelayiti kutumiza ma siginecha ku zida za ogwiritsa ntchito, okhala ndi ma frequency a 2483.5MHz mpaka 2500MHz, a S-band. Mapangidwe a bandiwa amathandizira ma satelayiti kuti azipereka zidziwitso zoyenda, kuyika deta, ndi ntchito zina zofunika kuzida zapansi.
Ndizofunikira kudziwa kuti ma frequency band a Beidou Generation I adapangidwa kuti akwaniritse zofunikira zaukadaulo ndikuyika zolondola pa nthawiyo. Ndi kupita patsogolo kwaukadaulo komanso kukweza mosalekeza ku dongosolo la Beidou, mibadwo yotsatira, kuphatikiza Beidou Generation II ndi III, idatengera ma frequency osiyanasiyana ndi njira zosinthira ma siginecha kuti apereke kulondola kwapamwamba komanso kodalirika komanso kudalirika kwamayendedwe.
Beidou Generation II
Beidou Generation II, dongosolo la m'badwo wachiwiri la Beidou Navigation Satellite System (BDS), ndi njira yofikira padziko lonse lapansi pasatana yopangidwa ndi China. Kumanga pamaziko a Beidou Generation I, cholinga chake ndi kupereka malo olondola kwambiri, odalirika kwambiri, kuyenda, ndi nthawi (PNT) kwa ogwiritsa ntchito padziko lonse lapansi. Dongosololi lili ndi magawo atatu: malo, nthaka, ndi ogwiritsa ntchito. Gawo lamlengalenga limaphatikizapo ma satelayiti angapo oyenda, gawo lapansi limaphatikizapo malo owongolera, malo owunikira, ndi ma uplink station, pomwe gawo la ogwiritsa ntchito lili ndi zida zosiyanasiyana zolandirira.
Ma frequency band a Beidou Generation II makamaka amaphatikiza magulu atatu: B1, B2, ndi B3, okhala ndi magawo ena motere:
a) B1 Band: Mafupipafupi osiyanasiyana a 1561.098MHz ± 2.046MHz, omwe amagwiritsidwa ntchito makamaka pakuyenda kwa anthu wamba ndi ntchito zoyika malo.
b) B2 Band: Mafupipafupi osiyanasiyana a 1207.52MHz ± 2.046MHz, omwe amagwiritsidwanso ntchito makamaka pantchito za anthu wamba, akugwira ntchito limodzi ndi gulu la B1 kuti apereke kuthekera kwapawiri-frequency poyikira kulondola kokwezeka.
c) B3 Band: Mafupipafupi osiyanasiyana a 1268.52MHz ± 10.23MHz, omwe amagwiritsidwa ntchito makamaka pantchito zankhondo, kupereka malo olondola kwambiri komanso kuthekera kolimbana ndi kusokoneza.
Beidou Generation III
Beidou Navigation System ya m'badwo wachitatu, yomwe imadziwikanso kuti Beidou-3 Global Navigation Satellite System, ndi njira yofikira padziko lonse lapansi yapa satellite yopangidwa paokha ndikuyendetsedwa ndi China. Yakwanitsa kudumpha kuchokera kumadera mpaka kufalikira kwapadziko lonse lapansi, ndikupereka kulondola kwambiri, kudalirika kwambiri, kuyenda, ndi ntchito zanthawi kwa ogwiritsa ntchito padziko lonse lapansi. Beidou-3 imapereka ma siginecha angapo otseguka pamagulu onse a B1, B2, ndi B3, kuphatikiza B1I, B1C, B2a, B2b, ndi B3I. Ma frequency agawidwe azizindikirozi ndi motere:
a) B1 Band: B1I: Pakati pafupipafupi 1561.098MHz ± 2.046MHz, chizindikiro chofunikira chomwe chimagwiritsidwa ntchito kwambiri pazida zosiyanasiyana zoyendera; B1C: Mafupipafupi apakati a 1575.420MHz ± 16MHz, chizindikiro choyambirira chothandizira ma satellite a Beidou-3 M/I ndipo amathandizidwa ndi ma terminals atsopano, apamwamba kwambiri.
b) B2 Band: B2a: Mafupipafupi apakati a 1176.450MHz ± 10.23MHz, komanso chizindikiro choyambirira chothandizira ma satellites a Beidou-3 M/I ndipo akupezeka pazigawo zatsopano, zapamwamba zam'manja; B2b: Mafupipafupi apakati a 1207.140MHz ± 10.23MHz, othandizira ma satelayiti a Beidou-3 M/I koma amangopezeka pama terminal osankhidwa apamwamba.
c) B3 Band: B3I: Mafupipafupi apakati a 1268.520MHz ± 10.23MHz, mothandizidwa ndi ma satelayiti onse a Beidou Generation II ndi III, mothandizidwa bwino kwambiri ndi ma module ambiri, ma frequency angapo.
Chengdu Concept Microwave Technology CO., Ltd ndi katswiri wopanga zida za 5G/6G RF.zakuyankhulana kwa satellite ku China, kuphatikiza fyuluta ya RF lowpass, fyuluta ya highpass, fyuluta ya bandpass, fyuluta ya notch/band stop, duplexer, Power divider ndi directional coupler. Zonse zitha kusinthidwa malinga ndi zomwe mukufuna.
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Nthawi yotumiza: Sep-25-2024