Colocated MIMO Radar Transmit Beamspace Design for Randomly Present Target Detection

In general detection problems, targets or sources may be present at an unknown direction. This letter proposes a detection scheme for the randomly present case based on the MIMO radar transmit beamspace (TB) technique. An average likelihood ratio (ALR) detector for randomly present target detection is formulated firstly. Then two TB design strategies for different present cases are proposed accordingly to get optimal detectors. Numerical results demonstrate that a significant gain in detection can be achieved by these designs comparing to the conventional methods. Finally, theoretical and numerical analyses illustrate the influence of the transceiver parameters on detection performance.