I-Frequency Band Ukwabiwa kwe-Beidou Navigation System

I-Beidou Navigation Satellite System (BDS, eyaziwa nangokuthi i-COMPASS, ukuhumusha kwesiShayina: BeiDou) iwuhlelo lokuzulazula ngesathelayithi lomhlaba wonke oluthuthukiswe yi-China. Iwuhlelo lwesithathu oluvuthiwe lokuzulazula ngesathelayithi elandela i-GPS ne-GLONASS.

Beidou Generation I

Ukunikezwa kwebhendi yefrikhwensi ye-Beidou Generation I ngokuyinhloko ihilela amabhendi e-Radio Determination Satellite Service (RDSS), ahlukaniswe ngokukhethekile ngamabhendi akhuphukayo kanye nawe-downlink:
a) Ibhendi ye-Uplink: Le bhendi isetshenziselwa okokusebenza komsebenzisi ukuze idlulisele amasiginali kumasathelayithi, anebanga lemvamisa elingu-1610MHz ukuya ku-1626.5MHz, okungele-L-band. Lo mklamo webhendi uvumela imishini yaphansi ukuthi ithumele izicelo zokuma nolunye ulwazi olufanele kumasathelayithi.
b) Ibhendi ye-Downlink: Le bhendi isetshenziselwa amasathelayithi ukuze adlulisele amasignali emishinini yomsebenzisi, enobubanzi obungu-2483.5MHz ukuya ku-2500MHz, okungeye-S-band. Lo mklamo webhendi uvumela amasathelayithi ukuthi anikeze ulwazi lokuzulazula, idatha yokubeka indawo, nezinye izinsiza ezidingekayo kumishini yaphansi.
Kuyaphawuleka ukuthi ukwabiwa kwebhendi ye-frequency ye-Beidou Generation I yayiklanyelwe kakhulu ukuhlangabezana nezidingo zobuchwepheshe kanye nokubeka izimfuno zokunemba zangaleso sikhathi. Ngokuthuthuka kwezobuchwepheshe kanye nokuthuthukiswa okuqhubekayo ohlelweni lwe-Beidou, izizukulwane ezalandela, okuhlanganisa i-Beidou Generation II kanye ne-III, zamukela amabhendi amafrikhwensi ahlukene kanye nezindlela zokushintsha amasignali ukuze zinikeze ukunemba okuphezulu kanye nezinsizakalo zokuzulazula ezinokwethenjelwa kanye nokubeka indawo.

Beidou Generation II

I-Beidou Generation II, uhlelo lwesizukulwane sesibili se-Beidou Navigation Satellite System (BDS), iwuhlelo lokuzulazula ngesathelayithi olufinyeleleka emhlabeni ngokuzimela olwakhiwe yi-China. Ukwakhela phezu kwesisekelo se-Beidou Generation I, ihlose ukuhlinzeka ngokunemba okuphezulu, ukuma okunokwethenjelwa okuphezulu, ukuzulazula, kanye nezinsizakalo zesikhathi (PNT) kubasebenzisi emhlabeni wonke. Uhlelo luqukethe izingxenye ezintathu: indawo, umhlabathi, nomsebenzisi. Ingxenye yesikhala ihlanganisa amasathelayithi okuzulazula amaningi, ingxenye yaphansi ihlanganisa iziteshi zokulawula eziyinhloko, iziteshi zokuqapha, neziteshi ze-uplink, kuyilapho ingxenye yomsebenzisi iqukethe izinto ezihlukahlukene zokwamukela.
Ukwabiwa kwebhendi ye-frequency ye-Beidou Generation II ngokuyinhloko ihlanganisa amabhendi amathathu: i-B1, i-B2, ne-B3, enamapharamitha athile alandelayo:
a) Ibhendi ye-B1: Ibanga lefrikhwensi lika-1561.098MHz ± 2.046MHz, ngokuyinhloko lisetshenziselwa ukuzulazula kwezakhamuzi kanye nezinsizakalo zokubeka indawo.
b) Ibhendi ye-B2: Ibanga lefrikhwensi lika-1207.52MHz ± 2.046MHz, eliphinde lisetshenziswe ikakhulukazi ezinkonzweni zomphakathi, lisebenza eduze nebhendi ye-B1 ukuhlinzeka ngamakhono okuma ama-dual-frequency ukuze uthole ukunemba okuthuthukisiwe kokuma.
c) Ibhendi ye-B3: Ibanga lefrikhwensi lika-1268.52MHz ± 10.23MHz, elisetshenziselwa kakhulu izinkonzo zempi, elinikeza ukunemba kokuma okuphezulu namandla okulwa nokuphazamiseka.

Beidou Generation III

I-Beidou Navigation System yesizukulwane sesithathu, eyaziwa nangokuthi i-Beidou-3 Global Navigation Satellite System, iwuhlelo lokuzulazula ngesathelayithi olufinyeleleka emhlabeni wonke olwakhiwe ngokuzimela futhi lusetshenziswa yi-China. Izuze ukweqa isuka kusifunda kuya kumhlaba jikelele, ihlinzeka ngokunemba okuphezulu, ukuma okunokwethenjelwa okuphezulu, ukuzulazula, nezinsizakalo zesikhathi kubasebenzisi emhlabeni wonke. I-Beidou-3 inikeza amasiginali amaningi esevisi evulekile kuwo wonke amabhendi e-B1, B2, ne-B3, afaka i-B1I, B1C, B2a, B2b, ne-B3I. Ukwabiwa kwefrikhwensi yalezi zimpawu zilandelayo:
a) Ibhendi ye-B1: B1I: ​​Imvamisa yesikhungo engu-1561.098MHz ± 2.046MHz, isignali eyisisekelo esetshenziswa kabanzi kumadivayisi ahlukahlukene wokuzulazula; B1C: Imvamisa emaphakathi ye-1575.420MHz ± 16MHz, isignali eyinhloko esekela amasathelayithi e-Beidou-3 M/I futhi esekelwa amatheminali eselula amasha, asezingeni eliphezulu.
b) Ibhendi ye-B2: B2a: Imvamisa yesikhungo engu-1176.450MHz ± 10.23MHz, nayo iyisiginali eyinhloko esekela amasathelayithi e-Beidou-3 M/I futhi itholakala kumatheminali eselula amasha, asezingeni eliphezulu; B2b: Imvamisa emaphakathi ye-1207.140MHz ± 10.23MHz, isekela amasathelayithi e-Beidou-3 M/I kodwa itholakala kuphela kumatheminali eselula akhethiwe.
c) Ibhendi ye-B3: B3I: Imvamisa yesikhungo engu-1268.520MHz ± 10.23MHz, esekelwa yiwo wonke amasathelayithi kuzo zombili i-Beidou Generation II kanye ne-III, ngokusekelwa okuhle kakhulu okuvela kumamojula anemodi eminingi, ama-multi-frequency.

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