DETECTING MOVING TARGET WITH DOPPLER SPREAD AND RANGE MIGRATION FOR FDA-MIMO RADAR

In this paper, we study the moving target detection problem for frequency diverse array multiple input multiple output (FDA-MIMO) radar under the assumption of Doppler spread (DS) and range migration (RM). Doppler spread is caused by the frequency offset between the arrays being closely coupled with the target velocity. Due to the range migration in each receiving channel in a coherent processing interval and Doppler spread in the joint spatial-time domain, the degraded coherent integration gain will reduce the target detection performance. Even, false targets will appear and interfere with detection when the frequency offset or target velocity is large. To address this problem, a quadratic scale transform combined with resampling method is proposed to eliminate the DS problem caused by frequency offset and the RM caused by velocity in moving target detection. The effectiveness of the proposed approach is validated by numerical results.