FPGA based filter design for self-mixing interferometry signals

Yuan Sun; Yanguang Yu; Wenbin Fan; Jiangtao Xi

doi:10.1117/12.906577

22 November 2011 FPGA based filter design for self-mixing interferometry signals

Yuan Sun, Yanguang Yu, Wenbin Fan, Jiangtao Xi

Proceedings Volume 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications; 819909 (2011) https://doi.org/10.1117/12.906577
Event: International Conference on Optical Instruments and Technology (OIT2011), 2011, Beijing, Beijing, China

Abstract

Self-mixing interferometry (SMI) signals are observed from a sensing system consisting of a laser diode with external optical feedbacks. SMI signals carry the information associated to both of the displacement and parameters of the SL. To retrieve the information precisely, pre-processing of SMI signals is the first key step. For achieving real-time, and high quality sensing, this paper proposes a Field-programmable gate arrays (FPGA) based filtering and normalizing processing for SMI signals. According to the noise features contained in SMI signal, a median filter and a wavelet transform based filter are combined for our design. Hardware co-simulation verified that the performance for this FPGA used filter design.

Citation Download Citation

Yuan Sun, Yanguang Yu, Wenbin Fan, and Jiangtao Xi "FPGA based filter design for self-mixing interferometry signals", Proc. SPIE 8199, 2011 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 819909 (22 November 2011); https://doi.org/10.1117/12.906577

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