Naslov
Digital processing of modulating signal for direct digital synthesizer indirect analog phase modulation

Autori
Modlic, Borivoj ; Nađ, Robert ; Bartolić, Juraj

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the KoREMA '96 - 41st Annual Conference / Bartolić, Juraj - Opatija : Hrvatsko društvo za komunikacije, računarstvo, elektroniku, mjerenja I automatiku (KoREMA), 1996, 51-54

Skup
KoREMA '96 - 41st Annual Conference

Mjesto i datum
Opatija, Hrvatska, 18.09.1996. - 20.09.1996

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
direct digital synthesizer; DDS modulation; phase modulation; digital filter

Sažetak
Direct digital synthesizers have the capability of the output signal frequency tuning. It is used for DDS output signal linear frequency modulation. FM-DDS compatibility with digital modulating signal sources, linear modulation characteristics and low element aging sensitivity are the major advantages of DDS application for analog FM. DDS direct phase modulation has the same good performances but its implementation is often not possible. Indirect PM generation is dual to the well known indirect analog FM generation. It requires the correction of the modulating signal digital sequence and sampling rate expansion. The correction rule is derived on the single frequency modulating signal example. The implementation on complex modulating signals is discussed. The modulating signal sampling frequency expander characteristics and the corresponding interpolation digital filter design are presented together with the overall system analysis.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

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