2021 VOLUME 28 ISPLEM (ISSN 1070-9908) Articles published in IEEEXplore® from 16 February to 15 March 2021 MIND-Net: A Deep Mutual Information Distillation Network for Realistic Low-Resolution Face Recognition 354-358 New Mutually Orthogonal Complementary Sets With Non-Power-of-Two Lengths 359-363 Vocal Tract Length Perturbation for Text-Dependent Speaker Verification With Autoregressive Prediction Coding 364-368 Ray-Space-Based Multichannel Nonnegative Matrix Factorization for Audio Source Separation 369-373 PSF Estimation in Crowded Astronomical Imagery as a Convolutional Dictionary LearningProblem 374-378 Unsupervised Person Re-Identification Based on Measurement Axis 379-383 Efficient Synthesis of Filter-and-Sum Array With Scanned Wideband Frequency-Invariant Beam Pattern and Space-Frequency Notching 384-388 The NLMS Is Steady-State Schur-Convex 389-393 Multiscale Optimal Filtering on the Sphere 394-398 Blind Signal Dereverberation Based on Mixture of Weighted Prediction Error Models 399-403 Online Construction of Variable Span Linear Filters Using a Fixed-Point Approach 404-408 Linguistic Generative Steganography With Enhanced Cognitive-Imperceptibility 409-413 Maximum-Likelihood, Magnitude-Based, Amplitude and Noise Variance Estimation 414-418 Recurrent Context Aggregation Network for Single Image Dehazing 419-423 Channel and Space Attention Neural Network for Image Denoising 424-428 www.signalprocessingsociety.org [17] APRIL 2021https://www.ieee.org/sp/index.html https://dx.doi.org/10.1109/LSP.2021.3053480 https://dx.doi.org/10.1109/LSP.2021.3053480 https://dx.doi.org/10.1109/LSP.2021.3054565 https://dx.doi.org/10.1109/LSP.2021.3055180 https://dx.doi.org/10.1109/LSP.2021.3055180 https://dx.doi.org/10.1109/LSP.2021.3055463 https://dx.doi.org/10.1109/LSP.2021.3050706 https://dx.doi.org/10.1109/LSP.2021.3050706 https://dx.doi.org/10.1109/LSP.2021.3055116 https://dx.doi.org/10.1109/LSP.2021.3053489 https://dx.doi.org/10.1109/LSP.2021.3053489 https://dx.doi.org/10.1109/LSP.2021.3055460 https://dx.doi.org/10.1109/LSP.2021.3056236 https://dx.doi.org/10.1109/LSP.2021.3056279 https://dx.doi.org/10.1109/LSP.2021.3056904 https://dx.doi.org/10.1109/LSP.2021.3058889 https://dx.doi.org/10.1109/LSP.2021.3055464 https://dx.doi.org/10.1109/LSP.2021.3056961 https://dx.doi.org/10.1109/LSP.2021.3057544 http://www.signalprocessingsociety.org