Joint likelihood estimation and model order selection for outlier censoring

• Published in: IET radar, sonar & navigation Vol. 15; no. 6; pp. 561 - 573
• Main Author: Karbasi, Seyed Mohammad
• Format: Journal Article
• Language: English
• Published: Wiley 01-06-2021
• Subjects: maximum likelihood estimation; modelling
• ISSN: 1751-8784; 1751-8792
• DOI: 10.1049/rsn2.12072

This study deals with the problem of outlier censoring from the secondary data in a radar scenario, where the number of outliers is unknown. To this end, a procedure consisting of joint likelihood estimation and statistical model order selection (MOS) is proposed. Since the maximum likelihood (ML) estimation of the outlier subset requires to solve a combinatorial problem, an approximate ML (AML) method is employed to reduce the complexity. Therefore, to determine the number of outliers, different MOS criteria based on likelihood function are applied. At the analysis stage, the performance of the proposed methods is assessed based on simulated data. The results highlight that the devised algorithms exhibit satisfactory performance with efficient complexity at the same time.