2021 Journal Issues October 6, 2021 Regular Papers Volume 109, Issue 10 October 2021 Access the Full Issue Regular Papers Scanning the Issue An Overview of Signal Processing Techniques for Terahertz Communications By H. Sarieddeen, M.-S. Alouini, and T. Y. Al-Naffouri This tutorial provides an overview of recent advances in signal processing techniques for terahertz communications. A Survey of Millimeter-Wave Communication: Physical-Layer Technology Specifications and Enabling Transmission Technologies By S. He et al. This survey discusses the state of the art and the development trends of mmWave communication. Hardware Acceleration of Sparse and Irregular Tensor Computations of ML Models: A Survey and Insights By S. Dave et al. This article surveys the efficient execution of sparse and irregular tensor computations of machine learning models on hardware accelerators. Scanning Our Past Birth of the First Ruby Laser in China By C. Chen, J. He, and H. Sun Access the Full Issue Share: