Investigation on Beamspace Multiple-Input Multiple-Output Synthetic Aperture Radar Data Imaging

Figure 1

Beamspace MIMO-SAR imaging scheme. (a) Four subpulses are transmitted by two subapertures in a single PRI, which results in more spatial diversities (SDs) in azimuth. (b) Two subpulses transmitted by the same Tx are used to illuminate different subswaths, while echoes corresponding to subpulses with different time delays transmitted by different subapertures are separated by narrow beam scanning on receive with null steering.

(a) In azimuth

(b) In elevation