The Internet of Things (IoT) is an emerging paradigm that can interact with and enhance wireless communication systems and artificial intelligence technologies. It is considered to have a wide range of applications. Meanwhile, fifth-generation (5G) networks promise high-speed rates, low latency, and high throughput. To this end, physical layer technologies such as Intelligent reflecting surface (IRS), backscatter communication (AmBC), Ultra-reliable and low-latency communication (URLLC), millimeter wave (mmWave) unmanned aerial vehicles (UAVs), physical layer security (PLS), non-orthogonal multiple access (NOMA) ,, and massive multiple-input multiple-output (MIMO) have the potential to vastly enhance the capabilities of 5G-enabled IoT systems and devices.

5G-enabled IoT can make a great contribution to society by providing and advancing intelligent services for human beings. The application field of 5G-enabled IoT relates to all sectors, such as industry, agriculture, environment, traffic, logistics, and so on. The scope of service, the mode of service, and the quality of service can be greatly improved by 5G-enabled IoT, which has effectively promoted intelligent development and helped make limited resources more readily available.

The aim of this Special Issue is to solicit original research articles, bringing together researchers and industry professionals to report recent research advances in physical layer technologies for 5G-enabled IoT. In light of the current interest in critical 5G-enabled IoT, this Special Issue welcomes research that discusses network architecture and system design, fog and edge computing, big data, and machine learning. We also invite researchers to contribute review articles that identify opportunities and challenges for 5G-enabled IoT technologies.

Potential topics include but are not limited to the following:

• AmBC for 5G-enabled IoT
• IRS for 5G-enabled IoT
• Massive MIMO systems for 5G-enabled IoT
• NOMA for 5G-enabled IoT
• UAVs communications for 5G-enabled IoT
• PLS for 5G-enabled IoT
• Energy harvesting for 5G-enabled IoT
• mmWave communications for 5G-enabled IoT
• Hardware architectures and designs for 5G-enabled IoT
• URLLC for 5G-enabled IoT
• Emerging modulation techniques for 5G-enabled IoT applications
• IoT-related integrated sensing and wireless communication designs and implementation