Due to the requirement of anti-interception and the limitation of processing capability of the fusion center,the subarray selection is very important for the distributed multiple-input multiple-output (MIMO) radar system,especially in the hostile environment.In such conditions,an efficient subarray selection strategy is proposed for MIMO radar performing tasks of target tracking and detection.The goal of the proposed strategy is to minimize the worst-case predicted posterior Cramer-Rao lower bound (PCRLB) while maximizing the detection probability for a certain region.It is shown that the subarray selection problem is NP-hard,and a modified particle swarm optimization (MPSO) algorithm is developed as the solution strategy.A large number of simulations verify that the MPSO can provide close performance to the exhaustive search (ES) algorithm.Furthermore,the MPSO has the advantages of simpler structure and lower computational complexity than the multi-start local search algorithm.