Determining Direction‐of‐Arrival Accuracy for Installed Antennas by Postprocessing of Far‐Field Data

Henrik Frid (Author), Johan Malmström (Author), B. Lars G. Jonsson (Author)

URI http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-267555, URN urn:nbn:se:kth:diva-267555, DOI 10.1029/2019RS006975

KTH Skolan för elektroteknik och datavetenskap (EECS) (Publisher)

publication

2019

Is part of

Radio Science · ISSN 0048-6604

54:12, 1204-1221

Component part, Online resource

Available online:

http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-267555

Subject

Engineering and Technology, Electrical Engineering, Electronic Engineering, Information Engineering, Teknik, Elektroteknik och elektronik

More details Cite

Summary

Direction‐of‐arrival (DoA) estimation accuracy can be degraded due to installation effects, such as platform reflections, diffraction from metal edges, and reflections and refraction in the radome. To analyze these effects, this paper starts with a definition of the term installation error related to DoA estimation. Thereafter, we present a postprocessing method, which can be used to determine the DoA estimation accuracy for installed antennas. By computing synthetic signals from the installed far‐field data, it is possible to analyze the installation errors described above, in addition to analyzing array model errors. The method formulation is general, thus allowing generic array configurations, installation configurations, and direction‐finding algorithms to be studied. The use of the presented method is demonstrated by a case study of a wideband four‐quadrant array. In this case study, we investigate the installation errors due to a single‐shell radome. Thereafter, the effects of platform reflections are also analyzed, for an antenna placement in the tail of a fighter aircraft. Simulation results are presented for both the monopulse and the MUltiple SIgnal Classification direction‐finding algorithms.