Abstract
In this paper we analyze an architectural extension for a Sandbridge processor which encompasses a CORDIC functional unit and the associated instructions. Specifically, the first instruction is CFG_CORDIC that configure the CORDIC unit in one of the rotation and vectoring modes for circular, linear, and hyperbolic coordinate systems. The second instruction is RUN_CORDIC that launches CORDIC operations into execution. As case study, we consider channel estimation and correction of the Orthogonal Frequency Division Multiplexing (OFDM) demodulation. In particular, we propose a scheme to implement OFDM channel correction within the extended instruction set. Preliminary results indicate a performance improvement over the base instruction set architecture of more than 80% for doing channel correction, which translates to an improvement of 50% for the entire channel estimation and correction task.
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Sima, M., Glossner, J., Iancu, D., Ye, H., Iancu, A., Hoane, A.J. (2005). CORDIC-Augmented Sandbridge Processor for Channel Equalization. In: Hämäläinen, T.D., Pimentel, A.D., Takala, J., Vassiliadis, S. (eds) Embedded Computer Systems: Architectures, Modeling, and Simulation. SAMOS 2005. Lecture Notes in Computer Science, vol 3553. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11512622_17
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DOI: https://doi.org/10.1007/11512622_17
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-26969-4
Online ISBN: 978-3-540-31664-0
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