title: Extended target recognition in cognitive radar networks.
abstract: We address the problem of adaptive waveform design for extended target recognition in cognitive radar networks. A closed-loop active target recognition radar system is extended to the case of a centralized cognitive radar network, in which a generalized likelihood ratio (GLR) based sequential hypothesis testing (SHT) framework is employed. Using Doppler velocities measured by multiple radars, the target aspect angle for each radar is calculated. The joint probability of each target hypothesis is then updated using observations from different radar line of sights (LOS). Based on these probabilities, a minimum correlation algorithm is proposed to adaptively design the transmit waveform for each radar in an amplitude fluctuation situation. Simulation results demonstrate performance improvements due to the cognitive radar network and adaptive waveform design. Our minimum correlation algorithm outperforms the eigen-waveform solution and other non-cognitive waveform design approaches.
authors.affiliation: Department of Electronic Engineering, Tsinghua University, Beijing 100084, China. weiym@mails.tsinghua.edu.cn
authors.forename: Yimin
authors.initials: Y
authors.lastname: Wei
authors.forename: Huadong
authors.initials: H
authors.lastname: Meng
authors.forename: Yimin
authors.initials: Y
authors.lastname: Liu
authors.forename: Xiqin
authors.initials: X
authors.lastname: Wang
mesh_terms: D000465:Algorithms; D011825:Radar