An end-to-end model for the correlator and beamformer of the Square Kilometer Array Low Frequency Aperture Array

Simone Chiarucci; Giovanni Comoretto

doi:10.1117/12.2560838

13 December 2020 An end-to-end model for the correlator and beamformer of the Square Kilometer Array Low Frequency Aperture Array

Simone Chiarucci, Giovanni Comoretto

Author Affiliations +

Proceedings Volume 11450, Modeling, Systems Engineering, and Project Management for Astronomy IX; 1145003 (2020) https://doi.org/10.1117/12.2560838
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

In order to validate the design of the Low Frequency Aperture Array (LFAA) for the Square Kilometer Array-Low telescope (SKA-Low), a complete model has been developed. The model includes 1) a sky simulator, producing a realistic sky signal with predefined spectrum and correlation properties, plus correlated and uncorrelated Radio Frequency Interference (RFI) signals; 2) a nonlinear model of the analog receiver chain; 3) a close representation of the digital signal processing algorithms for channelization, calibration and beamforming. The model describes correctly all the aspects of the LFAA station beamformer, generating the expected signal for up to 256 antennas and reproduces the processing required to combine them into a station signal. It is an useful tool to analyze variants of the proposed signal processing algorithms or to highlight possible problems. The resulting simulated output can be used to analyse the beamforming performance and as an input for a correlator simulation model in a telescope end-to-end simulation.

Conference Presentation

Citation Download Citation

Simone Chiarucci and Giovanni Comoretto "An end-to-end model for the correlator and beamformer of the Square Kilometer Array Low Frequency Aperture Array", Proc. SPIE 11450, Modeling, Systems Engineering, and Project Management for Astronomy IX, 1145003 (13 December 2020); https://doi.org/10.1117/12.2560838

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