Modeling and analysis of aliasing image spurs problem in digital-RF-converter-based IQ modulators

Author

Sadeghifar, M. Reza ; Wikner, J. Jacob

Author_Institution

Dept. of Electr. Eng., Linkoping Univ., Linkoping, Sweden

fYear

2013

fDate

19-23 May 2013

Firstpage

578

Lastpage

581

Abstract

In this work, we present an analytical study of aliasing image spurs problem in digital-RF modulators. The inherent finite image rejection ratio of this types modulators is conceptually discussed. A pulse amplitude modulation (PAM) model of the converter is used in the theoretical discussion. Behavioral level simulation of the digital-RF converter model is included. Finite image rejection is a limiting issue in this architecture, and Digital-IF mixing is used to alleviate the problem which is also reviewed and simulated.

Keywords

digital-analogue conversion; modulators; pulse amplitude modulation; PAM; aliasing image spurs problem; aliasing image spurs problem analysis; aliasing image spurs problem modeling; behavioral level simulation; digital-IF mixing; digital-RF converter model; digital-RF-converter-based IQ modulators; finite image rejection; pulse amplitude modulation; Amplitude modulation; Clocks; Frequency modulation; Mathematical model; Radio frequency; Wireless communication; Digital/analog converter; IQ modulator; Image rejection; Mixer-DAC; RFDAC; clock aliasing;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems (ISCAS), 2013 IEEE International Symposium on

Conference_Location

Beijing

ISSN

0271-4302

Print_ISBN

978-1-4673-5760-9

Type

conf

DOI

10.1109/ISCAS.2013.6571908

Filename

6571908