Performance of polarimetric beamformers for phased array radio telescopes
Paper in proceedings, 2011

The results of four recently introduced beamforming schemes for phased array systems are discussed, each of which is capable to provide high sensitivity and accurate polarimetric performance of array-based radio telescopes. Ideally, a radio polarimeter should recover the actual polarization state of the celestial source, and thus compensate for unwanted polarization degradation effects which are intrinsic to the instrument. In this paper, we compare the proposed beamforming schemes through an example of a practical phased array system (APERTIF prototype) and demonstrate that the optimal beamformer, the max-SLNR beamformer, the eigenvector beamformer, and the bi-scalar beamformer are sensitivity equivalent but lead to different polarization state solutions, some of which are sub-optimal.


Marianna Ivashina

Chalmers, Earth and Space Sciences, Advanced Receiver Development

S. J. Wijnholds

Netherlands Institute for Radio Astronomy (ASTRON)

Rob Maaskant

Chalmers, Signals and Systems, Communication and Antenna Systems, Antennas

K. F. Warnick

Brigham Young University

30th URSI General Assembly and Scientific Symposium, URSIGASS 2011, Istanbul, 13-20 August 2011


Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering





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