Arcetri Technical Report 5/2016

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SKA Project Series
LFAA Station Beamformer structure

G. Comoretto, C.Belli

INAF Osservatorio Astrofisico di Arcetri

Abstract

The LFAA tile processing modules (TPM) combine the signals from 256 dual-polarization antennas, in the frequency range 50-350 MHz, into a single station beam. Beamforming is done hyerachically, with the TPM first combining the 16 antennas that are processed in the module, and summing this partial sum in a network packet that travels across the 16 TPMs composing a station. This station beamformer performs also a corner turning operation, rearranging the channelized samples from the tile beamformer into sequences of contiguous time samples for a singhle channel at a time.

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