High-Speed FMCW Radar Frequency Synthesizer With DDS Based Linearization

Author

Scheiblhofer, Stefan ; Schuster, Stefan ; Stelzer, Andreas

Author_Institution

Johannes Kepler Univ., Linz

Volume

17

Issue

5

fYear

2007

fDate

5/1/2007 12:00:00 AM

Firstpage

397

Lastpage

399

Abstract

Recently , we introduced a software linearization technique for frequency-modulated continuous-wave (FMCW) radar applications using a nonlinear direct digital synthesizer based frequency source. In this letter, we present a method that uses this unconventional, cost efficient, basically nonlinear synthesizer concept, but is capable of linearizing the frequency chirp directly in hardware by means of defined sweep predistortion. Additionally, the concept is extended for the generation of defined nonlinear frequency courses and verified on measurements with a 2.45-GHz FMCW radar prototype

Keywords

FM radar; direct digital synthesis; distortion; linearisation techniques; 2.45 GHz; direct digital synthesizer; frequency chirp; frequency synthesizers; frequency-modulated continuous-wave radar; software linearization; sweep predistortion; Chirp; Costs; Frequency measurement; Frequency synthesizers; Hardware; Linearization techniques; Predistortion; Prototypes; Radar applications; Radar measurements; Direct digital synthesizer (DDS); frequency-modulated continuous-wave (FMCW) radar; linearization;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2007.895732

Filename

4167932