| In modern information warfare,the detection performance of a single radar is easy to reach the bottleneck,which is difficult to meet the needs of multi-target detection.Therefore,the networked radar with multiple radars working together came into being.While expanding the detection area through information sharing in the network,the networked radar also adopts reasonable resource scheduling scheme to improve the capacity of executable tasks.In addition,as a new radar system,distributed multiple input multiple output(MIMO)radar can put up with the problem of target radar cross section area flicker by its separate transceiver mode,and multiple sub beams formed by array segmentation can illuminate multiple targets at the same time.However,in the multi-target and multi-task combat scenario,both networked radar and distributed MIMO radar are faced with the problem of resources utilization.Therefore,this paper will study the resource scheduling scheme of multi-target imaging under MIMO networked radar.The main work is as follows:1.The imaging principle of inverse synthetic aperture radar(ISAR)is analyzed,including the derivation of range doppler imaging algorithm of monostatic and bistatic radar,and the simulation verification of sparse imaging algorithm based on compressed sensing.In addition,the networked radar resource scheduling framework is also introduced,which lays a foundation for subsequent research.2.For the time resource scheduling scheme of networked radar under the background of multi-target imaging task,this paper proposes the time resource scheduling algorithm of networked radar based on efficiency function and the time resource scheduling algorithm of distributed MIMO networked radar from the two perspectives of target allocation and imaging limitation.The former first designs the efficiency function related to the imaging quality to realize the allocation of multi-target imaging tasks,then calculates the number of observation pulses based on the sparse imaging principle,and finally constructs and solves the time resource scheduling model.Simulation experiments verify the feasibility and effectiveness of the algorithm,but it is also found that the traditional networked radar imaging is affected by the direction of target motion.Hence,for the sake of overcome this problem,this paper proposes a distributed MIMO networked radar time resource scheduling algorithm.The algorithm starts with the system of networked radar,and uses the distributed MIMO radar with separate transceiver to complete the integrated organization of networked radar,namely the distributed MIMO networked radar.Furthermore,considering the radio frequency stealth security of distributed MIMO networked radar,the algorithm establishes and solves the model with the least resource consumption and the highest success rate of task scheduling on the premise of ensuring the imaging effect.Simulation experiments verify the success rate of task scheduling and the value rate of target are improved,and the consumption rate of time resources is reduced for the proposed algorithm.3.For the multi-dimensional resource joint scheduling scheme of networked radar under the background of multi-target imaging task,a distributed MIMO networked radar array-time two-dimensional resource scheduling algorithm is proposed.From the perspective of saving resources,the algorithm establishes and solves the model based on the array segmentation technology and the requirements of target imaging.Finally,the array resource allocation scheme of each radar and the task execution sequence of each radar in a single scheduling interval are obtained.Simulation results corroborate that the algorithm can not only save array resources and time resources,but also improve the success rate of task scheduling.In short,the efficient management of radar resources is realized. |
