@inproceedings{est-lop-sed-her-san-12-aa-magfus,
  author = {Esteban, Luis and L{\'o}pez, Juan A. and Sedano Algarabel, Enrique and Hern{\'a}ndez-Montero, Sergio and S{\'a}nchez, Miguel},
  title = {Quantization Analysis of the Infrared Interferometer of the {TJ-II} for its Optimized {FPGA}-based Implementation},
  year = 2012,
  booktitle = {Proceedings of the 18th IEEE-NPSS Real Time Conference},
  location = {Berkeley, CA},
  pages = {1-5},
  month = jun,
  doi = {10.1109/RTC.2012.6418116},
  comment = {See journal version [est-lop-sed-her-san-13-aa-magfus]},
  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.}
}