Transmit Beampattern Design for Dual-Function Radar-Communication System with an Interleaved Array

In this paper, a beampattern design method is
proposed for the multi-input-multi-output (MIMO) dual-function
radar-communication (DFRC) system with an
interleaved array. To make full use of the whole aperture, first,
the transmit array is partitioned into two interleaved
subarrays, one is for radar and the other is for downlink
communications. Then, both the radar waveform and
communication beamformers are optimized by combining the
null-space projection (NSP) method and cyclic approach (CA)
to perform the coexistence of MIMO radar and downlink
communications. In addition, the communication
beampattern can be utilized to improve the detection
performance. Finally, several numerical results are given to
show the effectiveness of the proposed method.