Phase compensation and processing in multiple-input–multiple-output radars

In this paper the issue of phase discontinuity in MIMO radar systems is analyzed and described in detail, together with an efficient way for processing MIMO radar data by means of FFT. In particular, it is here shown that the phase of a point target illuminated by a MIMO radar has a number of discontinuities due to the geometry of the antennas. It is also shown that these become negligible in the far range, whilst they represent an issue in the short range if not compensated properly whereas, in turn, they prevent FFT-based algorithms to focus correctly the received signals. It is therefore here shown that data of MIMO radars have to be pre-processed in order to allow an efficient FFT-based focalization. For this purpose, together with a theoretical description of the problem, a sub-optimal algorithm is presented, discussed and tested against real data gathered by the JRC MIMO radar system.

SAMMARTINO Pier Francesco;  TARCHI Dario;  FORTUNY GUASCH Joaquim;  OLIVERI Franco;  GIULIANI Raimondo; 

2012-04-19

INST ENGINEERING TECHNOLOGY-IET

JRC64908

1751-8784,   

http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=06178369,    https://publications.jrc.ec.europa.eu/repository/handle/JRC64908,   

10.1049/iet-rsn.2011.0246,