DSN Deep-Space Array-Based Network Beamformer

  • John D. Bunton
  • Robert Navarro
Chapter

Abstract

NASA is proposing a newreceiving facility that needs to beamform broadband signals from hundreds of antennas. This is a similar problem to SKA beamforming with the added requirement that the processing should not add significant noise or distortion that would interfere with processing spacecraft telemetry data. The proposed solution is based on an FX correlator architecture and uses oversampling polyphase filterbanks to avoid aliasing. Each beamformer/correlator module processes a small part of the total bandwidth for all antennas, eliminating interconnection problems. Processing the summed frequency data with a synthesis polyphase filterbank reconstructs the time series. Choice of suitable oversampling ratio, and analysis and synthesis filters can keep aliasing below −9 dB while keeping the passband ripple low. This approach is readily integrated into the currently proposed SKA correlator architecture.

Keywords

beamformer correlator Deep Space Network FX correlator filterbank 

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Copyright information

© Springer 2005

Authors and Affiliations

  • John D. Bunton
    • 1
  • Robert Navarro
    • 2
  1. 1.CSIRO ICT CentreEppingAustralia
  2. 2.Jet Propulsion LaboratoryPasadenaUSA

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