A study of cross array with MIMO DBF

This paper presents a MIMO cross array with azimuth-elevation combined beamforming. Compared to an M×N rectangular array with one-way and two-way beamforming, the number of required array elements could be reduced from M×N to M+N+4 so as to drastically reduce the system cost while maintain higher angular resolution performance. Compared to an M+N cross array with one-way and two-way azimuth-elevation combined beamforming, the proposed MIMO cross array could achieve higher angular resolution with 4 additional transmitting antennas. This MIMO cross array with azimuth-elevation combined beamforming is designed for DBF systems for detecting single target or multi-target in different ranges (only when targets could be separated from each other after range detection processed) and it can greatly reduce the usage of array elements as well as other RF components.