High-Speed FMCW Radar Frequency Synthesizer With DDS Based Linearization
暂无分享,去创建一个
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
[1] B. Gold,et al. A digital frequency synthesizer , 1971 .
[2] R. Weigel,et al. Fast and accurate ramp generation with a PLL-stabilized 24-GHz SiGe VCO for FMCW and FSCW applications , 2003, IEEE MTT-S International Microwave Symposium Digest, 2003.
[3] A. Stelzer,et al. Signal model and linearization for nonlinear chirps in FMCW Radar SAW-ID tag request , 2006, IEEE Transactions on Microwave Theory and Techniques.