DOI: 10.1109/TMTT.2026.3676976   IEEEXplore: https://ieeexplore.ieee.org/document/11457317

A low-complexity, efficient spatial resampling technique for range-angle decoupling to improve resolution in both domains with 4D high resolution MIMO FMCW radar systems.

76.9 GHz for this demonstration

The discrete frequency components of the intermediate frequency (IF) signal are utilized to perform resampling in the virtual elements. For each frequency bin, the resampling process is conducted based on the corresponding wavelength. The spatial sampling grid is aligned with the wavelength of each frequency across the entire modulation bandwidth to eliminate the inconsistency in phase differences across virtual array elements. 2-D angle-range fast Fourier transforms (FFTs) are applied to ensure each target is concentrated within its correct cell to mitigate resolution degradation.

Wideband, large aperture, 4D high-resolution MIMO FMCW radar systems.

100 times improvement in complexity over existing range-angle decoupling methods.