Moving target detection of OFDM‐MIMO radar based on ST‐DFT

Abstract

Orthogonal frequency division multiplexing multiple‐input multiple‐output (OFDM‐MIMO) radar has different frequencies for different array elements’ transmitting signal. To a same moving target, different array elements obtain different Doppler frequencies. Hence, coherent integration gain of all array elements cannot be obtained if using traditional fast Fourier transform to process radar echo. Proposed is the scale‐transform discrete Fourier transform algorithm for achieving Doppler frequencies focus, thus coherent integration of different array elements and a higher processing gain for moving target detection can be achieved.