Abstract: Radar and IR distributed track fusion based on the feedback is studied . Firstly,multiple target tracking algorithm for every local sensor and fusion center target track fusion algorithm are put forward. Secondly,one-step fusion predictions of target states along with covariance matrix are fed back to local sensors to form a new tracking gate for each target,and the intersection of the new tracking gate and the original gate formed before feedback is taken as the effective tracking gate. In addition,target ...