Dynamic Reconfiguration of Link Adaptation algorithms for a Multi Carrier System
Studenteropgave: Kandidatspeciale og HD afgangsprojekt
- Sri Hanuma Chitti
- Gaurav Kulkarni
10. semester, Elektronik og IT, Kandidatuddannelsen (Spec. Software Defined Radio) (Kandidatuddannelse)
The objective of this project is to analyze whether
dynamic partial reconfiguration (PR) of an FPGA is
feasible for Link Adaptation (LA) algorithms for an
OFDM system such asWiMAX. Partial reconfiguration
of an FPGA saves hardware area by virtue of its
reusability. Previously two algorithms SRA and SAMPDA
were implemented and a large difference in
area usage was noted while providing the same performance
at certain conditions. To exploit this property,
partial reconfigurability of an FPGA is studied.
A new methodology called ATtACk is proposed that
helps to move systematically toward implementing
a PR system. A step by step process is followed in
three domains to finally assess implementation possibilities.
A live setup is used to calculate the SNR
which is used as the criteria for selecting an algorithm.
Guidelines for PR are first studied. It is seen
that the pin connections on the FPGA development
board, architectural limitations of the FPGA and size
of the hardware area requirement do not allow implementation
of a complete PR system on the development
board considered. Thus each portion of the
design is separately implemented and these limitations
are analyzed and further changes are proposed.
Considerations regarding a practical reconfigurable
LA are also discussed. Based on the limitations experienced
and the algorithm to be implemented, it
is concluded that a PR system for the two LA algorithms
is possible provided that further architectural
changes and algorithmic optimizations are performed.
Sprog | Engelsk |
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Udgivelsesdato | 2007 |
Antal sider | 95 |
Udgivende institution | Aalborg University |