Iyo siginecha sosi inogona kupa chaiyo uye yakagadzikana zvakanyanya bvunzo masaini kune akasiyana chikamu uye system test application. Iyo jenareta yechiratidzo inowedzera yakaringana modulation basa, iyo inogona kubatsira kutevedzera sisitimu siginecha uye kuita yekugamuchira kuita bvunzo. Zvese zviri zviviri vector siginecha uye RF siginecha sosi inogona kushandiswa seyeyedzo chiratidzo sosi. Pazasi isu tine maitiro avo pasi pekuongorora.
Iyo siginecha sosi inogona kupa chaiyo uye yakagadzikana zvakanyanya bvunzo masaini kune akasiyana chikamu uye system test application. Iyo jenareta yechiratidzo inowedzera yakaringana modulation basa, iyo inogona kubatsira kutevedzera sisitimu siginecha uye kuita yekugamuchira kuita bvunzo. Zvese zviri zviviri vector siginecha uye RF siginecha sosi inogona kushandiswa seyeyedzo chiratidzo sosi. Pazasi isu tine maitiro avo pasi pekuongorora.
Ndeupi musiyano uripo pakati pevector siginecha uye RF chiratidzo sosi?
1. Nhanganyaya kune Vector Signal Source
Vector signal jenareta yakaonekwa muma1980s, uye yakashandisa yepakati frequency vector modulation nzira yakasanganiswa neredhiyo frequency down conversion nzira kugadzira vector modulation signal. Nheyo iyi ndeye kushandisa frequency synthesis unit kugadzira inoenderera ichichinja microwave yemuno oscillator siginecha uye yakagadziriswa frequency yepakati frequency chiratidzo. Iyo yepakati frequency chiratidzo uye baseband chiratidzo inopinda muvector modulator kuti igadzire yepakati frequency vector modulated siginecha ine yakagadziriswa inotakura frequency (iyo inotakura frequency ndiyo frequency yeiyo point frequency chiratidzo). chiratidzo. Iyo redhiyo frequency siginecha ine yakafanana baseband ruzivo seyepakati frequency vector modulation chiratidzo. Iyo RF siginecha inozoiswa chiratidzo-inogadziriswa uye modulated neiyo sigineti yekumisikidza unit, yozotumirwa kune inobuda chiteshi kuti ibudiswe.
Vector chiratidzo jenareta frequency synthesis sub-unit, chiratidzo chekugadzirisa sub-unit, analog modulation system uye zvimwe zvinhu zvakafanana neyakajairwa chiratidzo jenareta. Musiyano uripo pakati peiyo vector chiratidzo jenareta uye yakajairwa chiratidzo jenareta ndeye vector modulation unit uye baseband chiratidzo chekugadzira unit.
Kufanana neanalog modulation, digital modulation inewo nzira nhatu dzekutanga, dzinoti amplitude modulation, phase modulation uye frequency modulation. A vector modulator kazhinji ine mana anoshanda mayuniti: yemuno oscillator 90 ° phase-shifting simba division unit inoshandura inopinza RF siginecha kuita maviri orthogonal RF masaini; iwo maviri emusanganisi mayuniti anoshandura baseband mu-chikamu chiratidzo uye quadrature siginecha Wedzerai neiyo inoenderana RF chiratidzo zvichiteerana; iyo simba synthesis unit inoverengera masaini maviri mushure mekuwanza uye zvabuda. Kazhinji, zvese zvekupinza uye zvinobuda zviteshi zvinogumiswa nemukati ne50Ω mutoro uye kutora inosiyanisa chiratidzo chekutyaira nzira yekudzikisa kurasikirwa kwekudzoka kwechiteshi uye kugadzirisa mashandiro evector modulator.
Iyo baseband chiratidzo inogadzira unit inoshandiswa kugadzira inodiwa yedhijitari modulated baseband siginecha, uye waveform inopihwa nemushandisi inogona zvakare kudhawunirwa kune waveform memory yekugadzira iyo mushandisi-inotsanangurwa fomati. Iyo baseband chiratidzo jenareta kazhinji ine burst processor, data jenareta, chiratidzo jenareta, finite impulse mhinduro (FIR) sefa, digital resampler, DAC, uye reconstruction filter.
2. Nhanganyaya yeRF signal source
Yemazuva ano frequency synthesis tekinoroji inowanzo shandisa isina kunanga synthesis nzira yekubatanidza frequency yeiyo huru vibration sosi uye frequency yereferensi frequency sosi kuburikidza nechikamu-chakakiyiwa loop. Inoda midziyo shoma yehardware, kuvimbika kwakanyanya, uye yakakura frequency renji. Yayo musimboti ndeyechikamu-yakakiyiwa loop, uye iyo RF siginecha sosi ndeye yakafara-spectrum pfungwa. Kazhinji kutaura, chero sosi yechiratidzo inogona kuburitsa chiratidzo cheRF inogona kukwira iyo RF chiratidzo sosi. Ikozvino vector siginecha masosi anowanzo muRF bhendi, saka anonzi zvakare vector RF siginecha masosi.
Chechitatu, musiyano pakati pezviratidzo zviviri
1. Yakachena radio frequency signal source inongo shandiswa kugadzira analog radio frequency single frequency signals, uye haiwanzo shandiswa kugadzira masignal modulated, kunyanya masignal modulated signals. Iyi mhando yechiratidzo sosi kazhinji ine yakafara frequency bhendi uye yakakura simba dynamic renji.
2. Mhepo yevheji yechiratidzo inonyanya kushandiswa kugadzira zviratidzo zvevector, kureva, zvinowanzoshandiswa zvikwangwani zvekugadzirisa mukukurukurirana kwedhijitari, zvakadai sel / Q modulation: ASK, FSK, MSK, PSK, QAM, customized I / Q, 3GPPLTE FDD uye TDD, 3GPPFDD / HSPA / HSPA +, GSM / EDGE / EDGE kushanduka, TD-SCDMA, WiMAX? Uye mamwe maitiro. Kune vector chiratidzo sosi, nekuda kwemukati bhendi modulator, iyo frequency haina kunyanya kukwira (inenge 6GHz). Iyo inoenderana indekisi yemodulator yayo (yakadai seyakavakirwa-mukati baseband chiratidzo bandwidth) uye nhamba yemasaini chiteshi indekisi yakakosha.
Disclaimer: Ichi chinyorwa chinyorwa chakadhindwa zvakare. Chinangwa chechinyorwa chino ndechekupa rumwe ruzivo, uye kodzero ndeyemunyori wekutanga. Kana mavhidhiyo, mapikicha, uye zvinyorwa zvakashandiswa muchinyorwa ichi zvinosanganisira nyaya dzekodzero, ndapota taura nemupepeti kuti agadzirise nazvo.