Publication

Radio Interferometric Calibration Using The SAGE Algorithm

Yatawatta, S., Zaroubi, S., de Bruyn, G., Koopmans, L. & Noordam, J., 2009, 2009 IEEE 13TH DIGITAL SIGNAL PROCESSING WORKSHOP & 5TH IEEE PROCESSING EDUCATION WORKSHOP, VOLS 1 AND 2, PROCEEDINGS. NEW YORK: IEEE (The Institute of Electrical and Electronics Engineers), p. 150-155 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Radio Interferometry is an essential method for astronomical observations. Self-calibration techniques have increased the quality of the radio astronomical observations (and hence the science) by orders of magnitude. Recently, there is a drive towards sensor arrays built using inexpensive hardware and distributed over a wide area acting as radio interferometers. Calibration of such arrays poses new problems in terms of computational cost as well as in performance of existing calibration algorithms. We consider the application of the Space Alternating Generalized Expectation Maximization (SAGE) [1] algorithm for calibration of radio interferometric arrays. Application to real data shows that this is an improvement over existing calibration algorithms that are based on direct, deterministic non linear optimization. As presented in this paper, we can improve the computational cost as well as the quality of the calibration using this algorithm.

Original languageEnglish
Title of host publication2009 IEEE 13TH DIGITAL SIGNAL PROCESSING WORKSHOP & 5TH IEEE PROCESSING EDUCATION WORKSHOP, VOLS 1 AND 2, PROCEEDINGS
Place of PublicationNEW YORK
PublisherIEEE (The Institute of Electrical and Electronics Engineers)
Pages150-155
Number of pages6
ISBN (Print)978-1-4244-3676-7
Publication statusPublished - 2009
Event13th IEEE Digital Signal Processing Workshop/5th IEEE Signal Processing Education Workshop -
Duration: 4-Jan-20097-Jan-2009

Other

Other13th IEEE Digital Signal Processing Workshop/5th IEEE Signal Processing Education Workshop
Period04/01/200907/01/2009

Event

13th IEEE Digital Signal Processing Workshop/5th IEEE Signal Processing Education Workshop

04/01/200907/01/2009

Event: Other

    Keywords

  • PARAMETER-ESTIMATION, SELF-CALIBRATION, EM ALGORITHM, POLARIMETRY, SIGNALS

ID: 4918888