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High-Speed FMCW Radar Frequency Synthesizer With DDS Based Linearization

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3 Author(s)
Scheiblhofer, S. ; Johannes Kepler Univ., Linz ; Schuster, S. ; Stelzer, A.

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

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:17 ,  Issue: 5 )