Abstract:

Under the tracking and searching (TAS) mode, phased array radar has to maintain stability captured target tracking, but also the responsibility to continue to search the airspace for new target. a new beam schedule strategy for multiple target tracking is proposed to achieve adaptive transform. In the interacting multiple model (IMM) framework, target expected dwell time is estimated based on the state’s one step prediction and is optimized through the constraint conditions of radar detection probability and tracking accuracy, target’s expected noise variance and expected error covariance are estimated based on the dwell time. Then the urgency factor, deviation factor and scheduling coefficient are respectively defined, the scheduling coefficient of the next time for each target is estimated at every time and the beam pointing coefficient is determined according to them. Direct the beam irradiation, when the beam irradiates the target,the measurement noise is updated and filtering, when the beam fails to irradiate the target, the state is replaced by the predicted value,a new target can be added unless the original targets can be stability tracked. Finally, the feasibility and effectiveness of the algorithm are demonstrated through the simulation.