Study on RM and BP algorithms used for imaging with different MIMO arrays

In order to build real-time microwave imaging system, multiple-input multiple-output (MIMO) imaging method is simulated in this paper. Two types of spare MIMO array are presented using effective phase center approximate theory. Two dimensional imaging in cross-down range is simulated with range migration (RM) and back projection (BP) algorithm. Imaging results using both algorithms are analyzed. The results show that images agreed with models using BP algorithm in both arrays. However, RM algorithm is not suitable for one of the spare arrays because the actual antenna positions are different from effective element positions. A couple of antennas for an effective mono-static should be closely enough for using RM algorithm.