Quantization Noise in Advanced LIGO Digital Control System
- Document #:
- LIGO-T1500351-v1
- Document type:
- T - Technical notes
Other Versions:
- Abstract:
- Advanced LIGO implements hundreds of control loops using digital signal processing techniques. These controllers are known to inject noise due to round-off error as signals are IIR filtered, and converted to and from the digital domain. In this project, the origins of this quantization noise, and its analysis have been investigated for the digital controller implemented at the Advanced LIGO sites. The quantization noise analysis is done for all its sources viz. the digital filters, Analog to Digital Converters(ADCs) and Digital to Analog Converters (DACs). The quantization noise in filters depend on the digital filter structure which has been thoroughly analyzed in this study. The report also would summarize the results of quantization noise analysis in the DAC code and noise shaping implementation so that the quantization noise level is mitigated in the frequency band of interest to gravitational wave detection.
- Files in Document:
-
- Final report (final_report.pdf, 2.2 MB)
- Other Files:
- PDF for final presentation (PDF for Final Presentation.pdf, 1.9 MB)
- PDF version of pptx (Presentation _ Quantization Noise in aLIGO Digital Con...pdf, 1.9 MB)
- Presentation 7/22 LLO (Presentation _ Quantization Noise in aLIGO Digital Co...pptx, 3.5 MB)
- The collection of SVG files of quantization noise analysis for digital filters of both the Hanford and Livingston sites. (Filter_Analysis.zip, 1.0 GB)
- The first progress report (Report_I_Quant_Noise.pdf, 1.5 MB)
- The project proposal (Quantization Noise.pdf, 159.4 kB)
- The second progress report (Progress_Report_II.pdf, 2.7 MB)
- Topics:
- Notes and Changes:
- SURF 15 Final Report. Ayush Pandey
- Referenced by:
- LIGO-T1500587: Final reports from LIGO SURF program, Summer 2015