Beampattern Analysis for MIMO Radar and Telecommunication System Coexistence

In this paper, we present a beampattern analysis of the MIMO radar coexistence algorithm proposed in [1]. We extend the previous work and analyze the performance of MIMO radars by projecting finite alphabet constant-envelope waveforms onto the null-space of interference channel matrix. First, we compare and analyze the Cramer-Rao bound (CRB) on angle direction estimation. Second, we compare and analyze beampatterns of the original radar waveform and the nullprojected radar waveform. Analytical and simulation results show minimal degradation of a radar's angle estimation of a target and transmit-receive beampattern. We also propose methods to substantially improve angle estimation and beampatterns of a null projected radar waveform which will not only guarantee optimal performance of the radar but at the same time guarantee coexistence of the radar and communication systems.