The frequency chirps applied in frequency modulated continuous wave (FMCW) radars are typically generated using a PLL imposing trade-offs between noise and modulation accuracy. We are removing this compromise by employing a fixed frequency PLL, direct digital chirps generation and up-conversion to RF using an RFDAC. With a simplified PLL requirement and better exploitation of nm-scale CMOS digital performance, we achieve lower noise, less chip area, and frequency error, and remove the issues with frequency ramp non-linearities in conventional FMCW architectures.
Direct Digital Modulation and RFDAC for Generation of Frequency Ramps in FMCW Radar
01.04.2019
355542 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Digital beamforming calibration for FMCW radar
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