Title: MASSIVE Overview
1MASSIVE Overview
2A distributed radio telescope LOFAR
3How does it work
Matlab algorithms
Input data - signal hidden in the noise
Output data - interference suppressed and signal
correlated
4Design space exploration strategy
Requirements
System specification
System realization
System-level decomposition and exploration
System-level composition
Subsystem exploration
Subsystem validation
Integration and calibration
5The DSP station model
6The MASSIVE Exploration Framework
7Topology specification
8Scenario specification
9Performance Model
W, , Size usage
Architecture errors With error margins
10Topology manipulation
- Detection of several topology variations
- mapping modifications
- replacing and / or renaming elements
- subsystems derivation
- repartitioning
11Automatic line mapping detection
- Automatic line mapping detection
- loosely based on Floyd Warshalls shortest
path algorithm - simplifies the mapping process a great deal
12The Massive Exploration Framework
- The application and architecture constraints
were introduced manually by the designer in the
IVL - We want to automate the process and link the
constraints to the top-level requirements
13Constraint derivation validation
14Constraints processor
Given the application constraints and the
mapping, we can derive the component level
constraints and back-track all the way to the
architecture top level.
15Constraints derivation example
e 1
16LOFAR architecture topology
Dedicated Platforms
Uniform Node Cluster
17LOFAR multiplicity of nodes
Uniform Node Cluster
Less flexibility 3 clusters topology
18LOFAR arithmetic representation
Dynamic processing Limits ?
19LOFAR reconfigure ability
- Hardcopy FPGA for subband filtering
- FGPA for the other processing intensive tasks
20LOFAR system requirements
Bandwidth of sub bands Number of sub bands
Then 30 cost increase
Optimum for platform 128 sub bands 256 kHz
21Thank you.