Range-Doppler Map

Range FFT is applied to fast-time ADC samples for each chirp to obtain range bins.

For each range bin, a Doppler FFT is then performed across the slow-time (chirp) dimension.

The resulting 2D spectrum over range and Doppler bins forms the Range-Doppler (RD) map.

Heat Map

A heat map provides an intuitive color-coded representation of the RD map magnitude.