Absolute Distance Measurement Based on Self-Mixing Interferometry Using Compressed Sensing

An absolute distance measurement sensor based on self-mixing interferometry (SMI) is suitable for application in aerospace due to its small size and light weight. However, an SMI signal with a high sampling rate places burden devices other onboard sources. using compressed sensing (CS) proposed this work relieve burden. The was sampled via matrix at lower than Nyquist’s law then recovered by the greedy pursuit algorithm. recovery algorithm improved increase robustness iteration speed. On measuring system error of 60 µm, difference between raw data 1800 points CS 300 within 0.15 demonstrating feasibility CS.