COMORETTO, GiovanniGiovanniCOMORETTOMONARI, JaderJaderMONARIBELLI, CarolinaCarolinaBELLICHIARUCCI, SimoneSimoneCHIARUCCISCHILLIRO', FrancescoFrancescoSCHILLIRO'SCHIAFFINO, MarcoMarcoSCHIAFFINOPERINI, FedericoFedericoPERINIMATTANA, AndreaAndreaMATTANAALDERIGHI, MONICAMONICAALDERIGHID'ANGELO, SERGIOSERGIOD'ANGELOPastore, SandroSandroPastoreNALDI, GiovanniGiovanniNALDIPUPILLO, GiuseppeGiuseppePUPILLOPOLONI, MarcoMarcoPOLONIRustichelli, SimoneSimoneRustichelliChiello, RiccardoRiccardoChielloZarb Adami, KrisKrisZarb AdamiMagro, AlessioAlessioMagro2025-02-252025-02-252020978151063677497815106367810277-786Xhttp://hdl.handle.net/20.500.12386/36206The SKA LOW telescope is an interferometer composed of 512 stations. Each station consists of 256 electronically steered antennas. The Low Frequency Aperture Array is the portion of the SKA-LOW telescope including the antennas and the related electronics. The LFAA signal processing chain amplifies, transports and combines the signals from the antennas composing each station into a coherent beam. Beamforming is performed in the frequency domain, with stringent requirements on bandpass flatness, linearity in a RFI contaminated spectral region, and allowed signal degradation. We adopted an architecture including a highly optimized oversampled polyphase filterbank for channelization, and a distributed network beamformer. The system has been validated as part of the Aperture Array Verification System, a single station operating at the SKA site in Western Australia.STAMPAenConference paper10.1117/12.25616992-s2.0-85099788987https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11445/2561699/The-signal-processing-chain-of-the-Low-Frequency-Aperture-Array/10.1117/12.2561699.full2020SPIE11445E..71CFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation