This book is devoted to enhanced version of selected papers presented at the 7th International Conference on Communication and Network Technology (ICCNT 2023). The objective of the proceedings of ICCNT 2023 is to present the recent research results and technological advances in the fields of theoretical and experimental applications of embedded systems, communications and signal processing decision as well as in emerging areas related to the tracks of the conference. The specific topics of interest within the scope of this special issue include design tools for electronics and embedded systems: embedded systems and software, system-on-chip (SoC), multiprocessor system-on-chip (MPSoC) platforms and applications, network-on-chip (NoC) design methodologies, reconfigurable computing, system design, synthesis, and optimization, advanced communications: circuits and systems for communications, optical fibers applications: optical communications, sensors, image, laser applications in: telemetry, LiDAR system, anemometry, computer 3D visions, range technique, RF and wireless communications, image and signal processing decision: image and video processing technology, compression, coding and implementation, cryptology and watermarking, real-time systems, sensors and instrumentation: data acquisition, audio, acoustic speech, biomedical signal processing, sensor microsystems and industrial sensors, computer engineering and networks: cloud computing technology, internet technology, computer security, computing networks, and data acquisition.