Umthombo wesiginali unganikeza amasiginali wokuhlola anembile futhi aqinile kakhulu kwizicelo ezahlukahlukene zokuhlola kanye nohlelo lokuhlola. I-generator yesiginali yengeza umsebenzi ofanele wokushintshana, ongasiza ukulingisa isiginali yohlelo nokwenza ukuhlolwa kokusebenza kokuthola. Kokubili isiginali ye-vector kanye nomthombo wesiginali we-RF angasetshenziswa njengomthombo wesiginali wokuhlola. Ngezansi sinezimpawu zazo ezingaphansi kokuhlaziywa.
Umthombo wesiginali unganikeza amasiginali wokuhlola anembile futhi aqinile kakhulu kwizicelo ezahlukahlukene zokuhlola kanye nohlelo lokuhlola. I-generator yesiginali yengeza umsebenzi ofanele wokushintshana, ongasiza ukulingisa isiginali yohlelo nokwenza ukuhlolwa kokusebenza kokuthola. Kokubili isiginali ye-vector kanye nomthombo wesiginali we-RF angasetshenziswa njengomthombo wesiginali wokuhlola. Ngezansi sinezimpawu zazo ezingaphansi kokuhlaziywa.
Uyini umehluko phakathi komthombo wesiginali we-vector nomthombo we-RF?
1. Isingeniso ku-Vector Signal Source
I-Vector Signal Generator ivele ngawo-1980s, futhi yasebenzisa indlela ephakathi nendawo yokuguqulwa kwe-vector ehlanganiswe nendlela yokuguqulwa kwe-radio Umgomo ukusebenzisa i-Frequency Synthesis Unit ukukhiqiza ngokuqhubekayo i-Oscillator yesiginali ye-Oscillator eguquguqukayo kanye nesibonakaliso semvamisa ephakathi nendawo. Isiginali yemvamisa ephakathi nendawo futhi isinali ye-Baseband Faka i-vector modulator ukukhiqiza isibonakaliso esiphakathi nendawo esinqunyelwe i-vermency verctor elungiselelwe imvamisa yenkampani yenethiwekhi (imvamisa yenethiwekhi imvamisa yesiginali yemvamisa yamaphuzu). Isiginali. Isiginali yemvamisa yomsakazo iqukethe imininingwane efanayo ye-Baseband njenge-Imvamisa yemvamisa yemvamisa. Isiginali ye-RF bese isina ngemvume futhi ilungiswe yiyunithi yesimo sesiginali, bese ithunyelwa ethekwini lokuphuma ukuze liphume.
I-Vector Signal ifreyiti ye-general Frequency Synthensis Sub-unit, iyunithi lesiginali yesizinda, uhlelo lokushintshashintsha lokushintshanisa kanye nezinye izici luyafana ne-generator eyisiginali ejwayelekile. Umehluko phakathi kwe-Vector Signal Generator kanye ne-generator ejwayelekile yesiginali yiyunithi yokushintshashintsha kwe-vector kanye ne-baseband Signal General Unit.
Njengokuguqulwa kwe-analog, ukuguquguquka kwedijithali nakho kunezindlela ezintathu eziyisisekelo, okungukuthi ama-amplitude wokushintshana, ukuguquguquka kwesigaba kanye nokuguquguquka kwezigaba zokushintshana. I-vector modulator imvamisa iqukethe amayunithi amane okusebenza: I-Oscillator yendawo ye-Oscillator 90 ° 20 ° Isigaba-Supling Power Division iguqula isibonakaliso se-RF esifaka izibonakaliso ezimbili ze-RF; Amayunithi amabili ama-mixer aguqula isinali esesigabeni se-baseband kanye nesiginali ye-quadreature ephindaphindeka ngesiginali ehambisanayo ye-RF ngokulandelana; Iyunithi ye-Power Synthesis ifanekisela lezi zimpawu ezimbili ngemuva kokuphindaphindeka kanye nokuphuma. Ngokuvamile, wonke amachweba wokufaka nokukhipha anqanyulwa ngaphakathi ngomthwalo we-50 welogi futhi amukele indlela yokushayela ehlukile yokushayela ukunciphisa ukulahleka kwe-port futhi uthuthukise ukusebenza kwesimonyo se-vector.
I-Baseband Signal Exerting Unit esetshenziselwa ukukhiqiza isikhangiso esidingekayo se-baseband esidingekayo sedijithali, futhi i-waveform enikezwe ngumsebenzisi nayo ingalandwa kwimemori ye-waveform yokwenza ifomethi echazwe ngumsebenzisi. I-Baseband Signal Generator ihlala ineprosesa ye-burst, i-generator yedatha, i-generator yesitayela, ukuphendula komsizi (i-fire) yokuhlunga, i-DIGAMPLER, kanye nokuhlunga kabusha kweDijithali, kanye nokwakhiwa kabusha, kanye nokwakhiwa kabusha kwe-DAC, nokwakha kabusha.
2. Ukwethulwa komthombo wesiginali we-RF
Ubuchwepheshe besikhathi sanamuhla be-Synthecsesis buvame ukusebenzisa indlela yokuhlanganiswa engaqondile yokuxhuma imvamisa yomthombo ophambili wokudlidliza kanye nemvamisa yomthombo wemvamisa wereferensi ngokusebenzisa i-loop ekhiyiwe ngesigaba. Kudinga imishini ye-Hardware engaphansi, ukuthembeka okuphezulu, nobubanzi bamatheksthi abanzi. Umgogodla wayo uyi-loop ekhiyiwe yesigaba, futhi umthombo wesiginali we-RF uwumqondo obanzi we-spectrum obanzi. Ngokuvamile, noma yimuphi umthombo wesiginali ongakhiqiza isinali e-RF angagibela umthombo wesiginali we-RF. Imithombo yesiginali yamanje ye-Vector kakhulu iningi le-RF band, ngakho-ke libizwa nangokuthi imithombo yesiginali ye-vector RF.
Okwesithathu, umehluko phakathi kwezimpawu ezimbili
1. Umthombo wesiginali womsakazo omsulwa usetshenziselwa kuphela ukukhiqiza ukukhiqiza amasiginali we-analog radio frequency perleventleen frequency amasignali, futhi ngokuvamile akusetshenziselwa ukukhiqiza amasiginali alungisiwe, ikakhulukazi amasiginali alungisiwe edijithali. Lolu hlobo lomthombo wesiginali ngokuvamile lunebhendi ebanzi ebanzi kanye nebanga elikhudlwana lamandla ashukumisayo.
2. I-Vector Signal Source isetshenziselwa ukukhiqiza amasiginali we-vector, okungukuthi, amasiginali wokushintshanisa asetshenziswa ngokujwayelekile ekuxhumaneni kwedijithali, okufana ne-I / Q, i-3GPPPDD / HSPA / HSPA +, i-TD-SCDMA, i-Wimax? Namanye amazinga. Ngomthombo wesiginali we-vector, ngenxa ye-band modulator yayo yangaphakathi, imvamisa ngokuvamile ayiphezulu kakhulu (mayelana ne-6GHz). Inkomba ehambisanayo yesilungiselelo sayo (njenge-Basebation ye-Basebation eyakhelwe ngaphakathi) kanye nenombolo yeziteshi zesiginali kuyinkomba ebalulekile.
Nesitatimende: Le ndatshana iyisihloko esibhalwe kabusha. Inhloso yalesi sihloko ukudlula eminye imininingwane, futhi ilungelo lobunikazi lingelombhali wokuqala. Uma amavidiyo, izithombe nemibhalo esetshenziswe kulesi sihloko kuhilela izindaba ze-copyright, sicela uxhumane nomhleli ukuze ubhekane nabo.