Prijemnik sa direktnom konverzijom radio-frekvencijskog signala / Direct conversion of radio-frequency signal receiver

• Main Author: Dušan Korolija
• Format: Article
• Language: English
• Published: University of Defence in Belgrade 2002-05-01
• Series: Vojnotehnički Glasnik
• Subjects: superheterodinski prijemnik; simetrična frekvencija; direktna konverzija; jednosmerni pomak; softverski radio; superheterodine receiver; image frequency; direct conversion; DC offset; software radio
• Online Access: http://scindeks-clanci.ceon.rs/data/pdf/0042-8469/2002/0042-84690203263K.pdf

Pojačani zahtevi za smanjenje troškova hardvera, veličine i potrošnje uređaja u ćelijskim mobilnim komunikacijama naveli su konstruktore na intenzivniju primenu prijemnika sa direktnom konverzijom. Dugo napušten u send superheterodinskog prijemnika, prijemnik sa direktnom konverzijom češće je korišćen u poslednjoj deceniji. Prijem sa direktnom konverzijom ima nekoliko prednosti koje ga čine pogodnim za integraciju, kao i za rod u vise opsega i za višestandardni rad. U ovom radu opisane su karakteristike prijemnika s direktnom konverzijom, kao i inherentni nedostatci superheterodinskog prijemnika sa stanovišta integracije. / Increased demands for low cost of hardware, small size and low power consumption of equipment in cellular mobile communications have driven designers to resurrect the direct conversion receiver. Long abandoned in favor of the mature superheterodine receiver, the direct conversion receiver has emerged over the last decade. Direct conversion reception has several qualities which makes it very suitable for integration as well as multi-band multi-standard operation. This paper describes the characteristics of the direct conversion receiver as well as the inherent imperfections of the superheterodine receiver from the aspect of integration.