Hiki i ke kumu hōʻailona ke hāʻawi i nā hōʻailona hoʻāʻo kūpono a paʻa loa no nā ʻāpana like ʻole a me nā noi hoʻāʻo ʻōnaehana. Hoʻohui ka mea hana hōʻailona i kahi hana modulation kūpono, hiki ke kōkua i ka hoʻohālikelike ʻana i ka hōʻailona ʻōnaehana a hana i ka hoʻāʻo ʻana o ka mea hoʻokipa. Hiki ke hoʻohana ʻia ka hōʻailona vector a me ke kumu hōʻailona RF ma ke ʻano he kumu hōʻailona hōʻike. Aia ma lalo iho kā mākou mau hiʻohiʻona ma lalo o ka nānā ʻana.

Hiki i ke kumu hōʻailona ke hāʻawi i nā hōʻailona hoʻāʻo kūpono a paʻa loa no nā ʻāpana like ʻole a me nā noi hoʻāʻo ʻōnaehana. Hoʻohui ka mea hana hōʻailona i kahi hana modulation kūpono, hiki ke kōkua i ka hoʻohālikelike ʻana i ka hōʻailona ʻōnaehana a hana i ka hoʻāʻo ʻana o ka mea hoʻokipa. Hiki ke hoʻohana ʻia ka hōʻailona vector a me ke kumu hōʻailona RF ma ke ʻano he kumu hōʻailona hōʻike. Aia ma lalo iho kā mākou mau hiʻohiʻona ma lalo o ka nānā ʻana.
He aha ka ʻokoʻa ma waena o ka hōʻailona vector a me ke kumu hōʻailona RF?
1. Introduction to Vector Signal Source
Ua ʻike ʻia ka mīkini hōʻailona vector i ka makahiki 1980, a ua hoʻohana i ke ʻano modulation vector frequency intermediate i hui pū ʻia me ke ʻano hoʻololi o ka radio frequency down no ka hoʻoulu ʻana i ka hōʻailona modulation vector. ʻO ke kumumanaʻo ka hoʻohana ʻana i kahi ʻāpana synthesis alapine e hana i kahi hōʻailona oscillator kūloko microwave mau a me kahi hōʻailona alapine waena. Hoʻokomo ka hōʻailona alapine waena a me ka hōʻailona baseband i ka modulator vector no ka hoʻopuka ʻana i kahi hōʻailona hoʻololi ʻia me ka alapine lawe paʻa (ʻo ke alapine o ka mea lawe ke alapine o ka hōʻailona alapine kiko). hōʻailona. Loaʻa i ka hōʻailona lekiō ka ʻike baseband like me ka hōʻailona modulation vector frequency intermediate. ʻO ka hōʻailona RF a laila ua hōʻailona ʻia a hoʻololi ʻia e ka ʻāpana hōʻailona hōʻailona, ​​a laila hoʻouna ʻia i ke awa puka no ka hoʻopuka.

ʻO ka mea hoʻoheheʻe hōʻailona vector frequency synthesis sub-unit, sub-unit hoʻomaʻamaʻa hōʻailona, ​​ʻōnaehana modulation analog a me nā ʻano ʻē aʻe e like me ka mea hana hōʻailona maʻamau. ʻO ka ʻokoʻa ma waena o ka mea hana hōʻailona vector a me ka mea hana hōʻailona maʻamau ʻo ia ka ʻāpana modulation vector a me ka ʻāpana hana hōʻailona baseband.

E like me ka modulation analog, loaʻa i ka modulation digital ʻekolu mau kumu kumu, ʻo ia hoʻi ka amplitude modulation, phase modulation a me ka frequency modulation. He ʻehā mau ʻāpana hana ma ka modulator vector: ʻo ka oscillator kūloko 90 ° phase-shifting power division unit e hoʻololi i ka hōʻailona RF komo i ʻelua mau hōʻailona RF orthogonal; hoʻololi nā ʻāpana hui ʻelua i ka hōʻailona baseband in-phase a me ka hōʻailona quadrature Multiply me ka hōʻailona RF pili i kēlā me kēia; ʻo ka hui mana synthesis e hōʻuluʻulu i nā hōʻailona ʻelua ma hope o ka hoʻonui a me nā puka. ʻO ka maʻamau, ua hoʻopau ʻia nā awa komo a me nā puka puka me kahi ukana 50Ω a hoʻohana i kahi ala hoʻokele hōʻailona ʻokoʻa e hōʻemi i ka nalowale o ke awa a hoʻomaikaʻi i ka hana o ka modulator vector.

Hoʻohana ʻia ka ʻāpana hana hōʻailona baseband no ka hoʻohua ʻana i ka hōʻailona baseband i hoʻololi ʻia me ka digitally modulated, a hiki ke hoʻoiho ʻia ke ʻano nalu i hāʻawi ʻia e ka mea hoʻohana i ka hoʻomanaʻo nalu no ka hoʻokumu ʻana i kahi ʻano i wehewehe ʻia e ka mea hoʻohana. ʻO ka mea hana hōʻailona baseband ka mea maʻamau i kahi kaʻina hoʻoheheʻe, ka mea hana ʻikepili, ka mea hana hōʻailona, ​​ke kānana impulse pane (FIR), kānana kikohoʻe, DAC, a me ka kānana hana hou.

2. Hoʻokomo i ke kumu hōʻailona RF
Hoʻohana pinepine ʻia ka ʻenehana synthesis alapine hou i kahi ala synthesis indirect no ka hoʻopili ʻana i ke alapine o ke kumu haʻalulu nui a me ke alapine o ke kumu alapine kuhikuhi ma o ka loop loop-locked. Pono ʻo ia i nā lako lako liʻiliʻi, hilinaʻi kiʻekiʻe, a me kahi ākea ākea. ʻO kāna kumu he loop-locked loop, a ʻo ke kumu hōʻailona RF he manaʻo ākea ākea. Ma ka ʻōlelo maʻamau, hiki i kēlā me kēia kumu hōʻailona hiki ke hana i kahi hōʻailona RF hiki ke holo i ke kumu hōʻailona RF. ʻO nā kumu hōʻailona vector o kēia manawa aia ka hapa nui i ka band RF, no laila ua kapa ʻia lākou nā kumu hōʻailona vector RF.

ʻO ke kolu, ka ʻokoʻa ma waena o nā hōʻailona ʻelua
1. Hoʻohana wale ʻia ke kumu hōʻailona lekiō maʻemaʻe e hana i nā hōʻailona lekiō hoʻokahi, a ʻaʻole i hoʻohana ʻia e hana i nā hōʻailona modulated, ʻoi aku ka nui o nā hōʻailona modulated digital. ʻO kēia ʻano kumu hōʻailona maʻamau, ʻoi aku ka nui o ka pūnae alapine a me ka nui o ka mana ikaika.

2. Hoʻohana nui ʻia ke kumu hōʻailona vector no ka hana ʻana i nā hōʻailona vector, ʻo ia hoʻi, hoʻohana pinepine ʻia nā hōʻailona modulation i ke kamaʻilio kikohoʻe, e like me l / Q modulation: ASK, FSK, MSK, PSK, QAM, customized I / Q, 3GPPLTE FDD a me TDD, 3GPPFDD / HSPA / HSPA +, GSM / EDGE / EDGE evolution, TD-SCDMA, WiMAX? A me nā kūlana ʻē aʻe. No ke kumu hōʻailona vector, ma muli o kāna modulator band kūloko, ʻaʻole kiʻekiʻe ke alapine (e pili ana i 6GHz). ʻO ka papa kuhikuhi e pili ana i kāna modulator (e like me ka bandwidth hōʻailona baseband i kūkulu ʻia) a me ka helu o nā kahawai hōʻailona he kuhikuhi koʻikoʻi.

Hōʻole: He ʻatikala i paʻi hou ʻia kēia ʻatikala. ʻO ke kumu o kēia ʻatikala e hāʻawi i ka ʻike hou aku, a no ka mea kākau kumu ke kuleana kope. Inā pili nā wikiō, nā kiʻi, a me nā kikokikona i hoʻohana ʻia ma kēia ʻatikala i nā pilikia kope, e ʻoluʻolu e kelepona i ka mea hoʻoponopono e hoʻoponopono iā lākou.