Preface: The 4th International Conference on Communications, Information, Electronic and Energy Systems (CIEES 2023)

This conference aimed to provide an international forum for researchers, academics, people in industry, and students to address recent research results and to present and discuss their ideas, theories, technologies, systems, tools, applications, works in progress and experiences on all theoretical and practical issues arising in telecommunications, electronics, signal processing and applications, information technologies, energy, automotive and industrial engineering.