2PAD

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2PADs Beamforming Software

• Design and Implementation
• Aziz AhmedSaid (UoM)
• Other Contributors
• Stef Salvini, Fred Dulwich, Ben Mort (OERC),
  Chris Shenton (UoM)
• Presented by Chris Shenton (UoM)

2
Objectives

• To design and implement a real-time 2
  polarisation beamformer on 2PADs processing
  engine
• To design and implement the data transfer,
  storage and display software to run on the back
  end host computer
• To test, verify and evaluate 2PADs performance.

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System Overview
Multi Channel ADC
Digital Signal Processor
LNA Signal Condition
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Our task
Digital Signal Processor
Multi Channel ADC
LNA Signal Condition
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2PADs Processing Engine
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Software Design Flow
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Software Kernel and Libraries

• More efficient Simple design, less latency,
  optimised for speed
• Better usage of resources Memory, thread units
• Full control of the chip
• Full access to all the software which enables
  further customisation/tuning for every
  application

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Typical Beamforming Scheme
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Our Beamforming Scheme
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Logical Mapping on the Cyclops System
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PhysicalMapping
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Data Path
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Data Flow
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Data Streams Structure
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The Beamformer

• We have a fully working beamformer
• 2 Polarisations
• 1,2,4 or 8 beams (more is possible)
• NumberOfBeams X NumberOfFreqBands K
• (K represents the total bandwidth per
  polarisation)
• K 300 for 1 beam and goes up to 800 for 8
  beams (these are just initial estimations, based
  on simulations)
• For example for 8 beams 100MHz per beam.

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Simulation Setup
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Simulation Results
2 Polarisations, 2 Frames, 8 Beams per frame, 64
Frequency bands per beam.
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Simulation Results (Zoom)
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Summary

• We have designed and implemented a customised and
  highly optimised software kernel and libraries
  for the Cyclops.
• We have designed, implemented and fully tested a
  multi-beam, 2 polarisation beamformer for the
  Cyclops system.
• We have shown good correlation between
  theoretical simulation and simulated hardware.

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Future work

• Create the Host computer software
• Port the beamformer to the real hardware
• Perform real test, verification and evaluation of
  the beamformer.
• Perform code and datapath profiling to fully
  understand the power vs performance
  characteristics of the system.