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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Esteban, L. Lopez, J.A. Sedano, E. Hernandez-Montero, S. Sanchez, M. |
| Copyright Year | 2012 |
| Description | Author affiliation: CIEMAT, Madrid, Spain (Esteban, L.; Sanchez, M.) || Universidad Politécnica de Madrid, Spain (Lopez, J.A.; Sedano, E.; Hernandez-Montero, S.) |
| Abstract | Infrared interferometers are used in magnetic fusion devices for measuring the line-integrated-electron density of the plasmas. An FPGA-based processing system is currently being used in the TJ-II infrared interferometer to compute the electron density. In high performance Digital Signal Processing (DSP) applications, the computations carried out in the FPGAs are usually performed in fixed point. The floating-point values of the algorithm description must be quantized to their fixed-point counterparts, introducing some deviations with respect to the un-quantized case. These deviations are modeled as Round-Off Noise (RON) sources, whose effects are propagated through the different parts of the system. Thus, these quantization operations significantly affect to the maximum attainable system performance. In the TJ-II system, the amount of RON is a limiting factor. Therefore, its analysis and reduction is essential to perform the control operations in real time. |
| Starting Page | 1 |
| Ending Page | 5 |
| File Size | 715047 |
| Page Count | 5 |
| File Format | |
| ISBN | 9781467310826 |
| e-ISBN | 9781467310840 |
| DOI | 10.1109/RTC.2012.6418116 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2012-06-09 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Polynomials Quantization Chaos Random variables Phase measurement Field programmable gate arrays Plasma measurements Legendre polynomials Polynomial Chaos Expansion (PCE) Dynamic range Round-off-noise |
| Content Type | Text |
| Resource Type | Article |
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