Abstract
In this paper, an antenna array aperture resource management scheme of opportunistic array radar (OAR) based on chance-constraint programming (CCP) is proposed for multiple target tracking (MTT). In the multi-target tracking scenario, multiple beams need to be synthesized to illuminate the targets. According to the predicted distance of targets, the OAR can intelligently segment the antenna array aperture, and select the optimal combination of array elements to synthesize the satisfactory beams with the element-level antenna steering. Owing to the unique array arrangement and work mode of opportunistic array, the element number in working modes is uncertain. To represent the uncertainty, a fuzzy CCP model is introduced. The element number in working modes is viewed as a fuzzy variable. The maximum tracking error, which is denoted by Bayesian Cramer-Rao lower bound(BCRLB), of the targets is regarded as the objective function. The fuzzy simulation algorithm is embedded into genetic algorithm (GA) to compose a hybrid intelligent optimization algorithm to solve the CCP problem. The simulation results verify the validity and practicability of the antenna array aperture resource allocation scheme.
Highlights
This paper studies the antenna array aperture resource management of opportunistic array radar (OAR) for multiple target tracking (MTT)
We propose an antenna array aperture resource management scheme based on chance-constraint programming (CCP) for MTT in OAR system
This paper presents an antenna aperture resource management scheme based on CCP for MTT of OAR
Summary
According to the traditional method of pattern synthesis, in order to synthesize multiple beams, multiple antenna arrays are needed[5]. As a new system radar assigning the array elements arbitrarily and aperiodically over the available open areas of entire 3-D space on the platform[6][7], the opportunistic array radar (OAR) can segment the antenna aperture and control the antenna elements at the element-level to synthesize the satisfactory pattern on the condition that the specified confidence level is satisfied[8,9,10]. Different from the node selection[11], the resource management of antenna aperture is for one antenna array, and we segment the antenna array and allocate the antenna elements.
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