Title :
Simultaneous Multibeam Resource Allocation Scheme for Multiple Target Tracking
Author :
Junkun Yan ; Hongwei Liu ; Bo Jiu ; Bo Chen ; Zheng Liu ; Zheng Bao
Author_Institution :
Nat. Lab. of Radar Signal Process., Xidian Univ., Xi´an, China
Abstract :
A colocated multiple-input multiple-output (MIMO) radar system has the ability to address multiple beam information. However, the simultaneous multibeam working mode has two finite working resources: the number of beams and the total transmit power of the multiple beams. In this scenario, a resource allocation strategy for the multibeam working mode with the task of tracking multiple targets is developed in this paper. The basis of our technique is to adjust the number of beams and their directions and the transmit power of each beam through feedback, with the purpose of improving the worst tracking performance among the multiple targets. The Bayesian Cramér-Rao lower bound (BCRLB) provides us with a lower bound on the estimated mean square error (MSE) of the target state. Hence, it is derived and utilized as an optimization criterion for the resource allocation scheme. We prove that the resulting resource optimization problem is nonconvex but can be reformulated as a set of convex problems. Therefore, optimal solutions can be obtained easily, which greatly aids real-time resource management. Numerical results show that the worst case tracking accuracy can be efficiently improved by the proposed simultaneous multibeam resource allocation (SMRA) algorithm.
Keywords :
MIMO radar; convex programming; mean square error methods; radar tracking; resource allocation; target tracking; Bayesian Cramer-Rao lower bound; MIMO radar system; convex problems; mean square error; multibeam resource allocation scheme; multiple target tracking; MIMO radar; Radar antennas; Radar tracking; Resource management; Target tracking; Transmitters; BCRLB; colocated MIMO; convex optimization; multiple targets; simultaneous multibeam resource allocation (SMRA);
Journal_Title :
Signal Processing, IEEE Transactions on
DOI :
10.1109/TSP.2015.2417504