Arcetri Technical Report 4/2017

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SKA Project Series
LFAA tile beamformer signal processing

G. Comoretto, C.Belli

INAF Osservatorio Astrofisico di Arcetri

Abstract

The LFAA digital signal processing chain is described. The processing starts with the ADC sampling, and includes channelization, calibration, beamforming and all rescaling and requantization stages present in the processing chain. Expected signal level and numeric coefficients embedded in the processing are detailed. The description is purely functional, i.e. it does not include implementation details that do not affect the signal. Time tagging and auxiliary data (total power, diagnostic spectra) produced by the processing chain are also described.

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