ʻO ka Beidou Navigation Satellite System (BDS, ʻike ʻia hoʻi ʻo COMPASS, unuhi ʻōlelo Kina: BeiDou) he ʻōnaehana hoʻokele ukali honua i hoʻomohala kūʻokoʻa e Kina. ʻO ia ke kolu o ka ʻōnaehana hoʻokele ukali ma hope o GPS a me GLONASS.
Beidou Generation I
ʻO ka hoʻokaʻawale ʻana i ke alapine alapine o Beidou Generation I e pili ana i nā pūna Radio Determination Satellite Service (RDSS), i hoʻokaʻawale ʻia i nā hui uplink a downlink:
a) Uplink Band: Hoʻohana ʻia kēia pūʻali no nā mea hoʻohana e hoʻouna i nā hōʻailona i nā satelite, me ke alapine o 1610MHz a 1626.5MHz, no ka L-band. Hiki i kēia hoʻolālā band ke hoʻouna i nā noi hoʻonohonoho a me nā ʻike pili ʻē aʻe i nā satelite.
b) Downlink Band: Hoʻohana ʻia kēia pūʻali no nā satelite e hoʻouna i nā hōʻailona i nā mea hoʻohana, me kahi alapine o 2483.5MHz a 2500MHz, no ka S-band. ʻO kēia hoʻolālā band e hiki ai i nā satelite ke hāʻawi i ka ʻike hoʻokele, ka ʻikepili hoʻonohonoho, a me nā lawelawe pono ʻē aʻe i nā lako honua.
He mea nui ka hoʻokaʻawale ʻana o ka band frequency o Beidou Generation I i hoʻolālā mua ʻia e hoʻokō i nā koi ʻenehana a me nā koi pololei o ke kūlana o ia manawa. Me ka holomua ʻenehana a me ka hoʻomau mau ʻana i ka ʻōnaehana Beidou, ua hoʻohana nā hanauna ma hope, me Beidou Generation II a me III, i nā alapine alapine like ʻole a me nā ala modulation hōʻailona e hāʻawi i nā lawelawe hoʻokele a me ka hoʻonohonoho kūlana kiʻekiʻe.
Beidou Generation II
ʻO Beidou Generation II, ka ʻōnaehana lua o ka Beidou Navigation Satellite System (BDS), he ʻōnaehana hoʻokele satellite hiki ke loaʻa i ka honua i hoʻomohala kūʻokoʻa e Kina. Kūkulu ʻia ma luna o ke kahua o Beidou Generation I, manaʻo ia e hāʻawi i nā lawelawe kikoʻī kiʻekiʻe, hilinaʻi kiʻekiʻe, hoʻokele, a me ka manawa (PNT) i nā mea hoʻohana ma ka honua holoʻokoʻa. Aia i loko o ka ʻōnaehana ʻekolu mau ʻāpana: space, ground, a me ka mea hoʻohana. Loaʻa i ka ʻāpana ākea nā satelite hoʻokele lehulehu, ʻo ka ʻāpana ʻāina e hoʻopuni ana i nā kikowaena mana haku, nā keʻena kiaʻi, a me nā kikowaena uplink, aʻo ka ʻāpana mea hoʻohana e loaʻa i nā ʻano mea hoʻokipa.
ʻO ka māhele alapinepine o Beidou Generation II e hoʻopili nui i ʻekolu mau pūʻulu: B1, B2, a me B3, me nā ʻāpana kikoʻī penei:
a) B1 Band: ʻO 1561.098MHz ± 2.046MHz, hoʻohana nui ʻia no ka hoʻokele kīwila a me nā lawelawe kūlana.
b) B2 Band: ʻO ka laulā pinepine o 1207.52MHz ± 2.046MHz, i hoʻohana mua ʻia no nā lawelawe kīwila, e hana pū ana me ka pūʻulu B1 e hāʻawi i nā mana hoʻonohonoho ʻelua-frequency no ka hoʻonui ʻana i ka pololei o ke kūlana.
c) B3 Band: ʻO ka laulā pinepine o 1268.52MHz ± 10.23MHz, hoʻohana mua ʻia no nā lawelawe koa, e hāʻawi ana i ka pololei o ke kūlana kiʻekiʻe a me ka hiki ke hoʻopilikia.
Beidou Generation III
ʻO ke kolu o ka hanauna ʻo Beidou Navigation System, i ʻike ʻia hoʻi ʻo Beidou-3 Global Navigation Satellite System, he ʻōnaehana hoʻokele satellite hiki ke ʻike ʻia ma ke ao holoʻokoʻa i kūkulu ʻia a hoʻohana ʻia e Kina. Ua hoʻokō ʻo ia i kahi lele mai ka ʻāpana a hiki i ka uhi honua, e hāʻawi ana i ke kūlana kiʻekiʻe, hilinaʻi kiʻekiʻe, hoʻokele, a me nā lawelawe manawa i nā mea hoʻohana ma ka honua holoʻokoʻa. Hāʻawi ʻo Beidou-3 i nā hōʻailona lawelawe hāmama ma waena o nā pūʻulu B1, B2, a me B3, me B1I, B1C, B2a, B2b, a me B3I. ʻO ka hoʻokaʻawale pinepine ʻana o kēia mau hōʻailona penei:
a) B1 Band: B1I: ʻO ka alapine waena o 1561.098MHz ± 2.046MHz, he hōʻailona kumu i hoʻohana nui ʻia i nā mea hoʻokele like ʻole; B1C: ʻO ke alapine waena o 1575.420MHz ± 16MHz, he hōʻailona mua e kākoʻo ana i nā satelite Beidou-3 M/I a kākoʻo ʻia e nā mea hoʻopau kelepona kiʻekiʻe.
b) B2 Band: B2a: ʻO ke alapine o ka waena o 1176.450MHz ± 10.23MHz, he hōʻailona mua hoʻi e kākoʻo ana i nā satelite Beidou-3 M/I a loaʻa ma nā mea hoʻopau kelepona kiʻekiʻe; B2b: ʻO ka alapine waena o 1207.140MHz ± 10.23MHz, e kākoʻo ana i nā satelite Beidou-3 M/I akā loaʻa wale nō ma nā pahu kelepona kiʻekiʻe.
c) B3 Band: B3I: ʻO ke alapine waena o 1268.520MHz ± 10.23MHz, i kākoʻo ʻia e nā satelite āpau ma Beidou Generation II a me III, me ke kākoʻo maikaʻi loa mai nā ʻano mode multi-frequency modules.
ʻO Chengdu Concept Microwave Technology CO., Ltd he mea hana loea o nā ʻāpana 5G/6G RFno ka meakamaʻilio satellite ma Kina, me ka kānana RF lowpass, kānana kiʻekiʻe, kānana bandpass, kānana notch/band stop filter, duplexer, Power divider and directional coupler. Hiki ke hoʻopilikino ʻia lākou a pau e like me kāu requrements.
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Ka manawa hoʻouna: Sep-25-2024