Abstract: A new method to cue and hand over a target is presented in order to solve the problems, such as unreasonable distribution of search area, long time consuming due to inaccurate beam position arrangement, overused radar resource and even wrong handover, which exist in target designation and handover of the early-warning radar and ground-based radar. Based on a nonlinear characteristics of target trajectory and the transformation of coordinates, the proposed method uses KEF to determine the orbits of target smoothing, and the search area is distributed and upgraded by the probability of target occurrence. This is a dynamic beam position arrangement designed based on the probability density of target occurrence. The target designation and handover and the beam position arrangement are experimented. The experimental reults show that the proposed method is better than the conventional method in error control, and the hit probability of beam position arrangement method based on probability density of target is bigger than that of conventional beam position arrangement method. The success probability of target designation and handover of the phased array radar is efficiently optimized, thus resulting in the saving of the radar resources. Key

Key words: ordnancescienceandtechnology, phasedarrayradar, designationandhandover, extendKalmanfilter, searcharea, beampositionarrangement