Qiuyang Zhou, Yuhui Zhang, Cai Yi, Jianhui Lin, Liu He, Qiwei Hu. Convolutional Sparse Coding Using Pathfinder Algorithm-Optimized Orthogonal Matching Pursuit With Asymmetric Gaussian Chirplet Model in Bearing Fault Detection. IEEE Sensors Journal, 2021, 21(16): 18132-18145.
//doi.org/10.1109/JSEN.2021.3086015

Fig. 2. Schematic diagram of the convolution process represented by matrix multiplication.