Abstract: I welcome you to the fourth issue of the IEEE Communications Surveys and Tutorials in 2021. This issue includes 23 papers covering different aspects of communication networks. In particular, ...

Abstract: Time–frequency (TF) analysis (TFA) is a valuable tool for capturing nonstationary features in time-varying signals. However, for strongly amplitude-modulated and frequency-modulated (AM–FM) ...

Deep-sea mining is the process of extracting and often excavating mineral deposits from the deep seabed. The deep seabed is the seabed at ocean depths greater than 200m, and covers about two-thirds of ...

Cornbread Hemp’s full-spectrum CBD oil is USDA certified organic and provides about 50 milligrams (mg) of CBD per serving. We’ve had three different testers try this oil since 2022. They found that it ...