Title :
Spurious performance of direct digital synthesizers generating modulated signals
Author :
Salis, Jose M Riera
Author_Institution :
ETSI Telecomunicacion, Univ. Politecnica de Madrid, Spain
Abstract :
The performance of direct digital synthesizers (DDS) when employed to generate modulated signals is studied. From the different sources of distortion, the phase truncation process is analyzed as the main differences with the carrier DDS are expected in this process. The results show that in some cases an improvement in the spurious levels can be obtained, mainly due to the randomization of the truncation sequence. This could be the basis for methods for improve the performance of carrier DDS
Keywords :
direct digital synthesis; frequency synthesizers; modulation; signal synthesis; carrier DDS; direct digital synthesizers; distortion sources; modulated signals generation; phase truncation process; spurious performance; truncation sequence; Amplitude modulation; Digital modulation; Digital systems; Digital-analog conversion; Frequency; Phase modulation; Sampling methods; Signal generators; Signal processing; Synthesizers;
Conference_Titel :
Electrotechnical Conference, 1994. Proceedings., 7th Mediterranean
Conference_Location :
Antalya
Print_ISBN :
0-7803-1772-6
DOI :
10.1109/MELCON.1994.381103
