This three-volume set LNICST 701-703 constitutes the refereed post-conference proceedings of the 15th EAI International Conference on Wireless and Satellite Systems, WiSATS 2025, held in Harbin, China during August 7–9, 2025.The 108 full papers presented in these volumes were carefully reviewed and selected from 274 submissions.They are organized into the following topical sections:Part I: Al-Enabled Communication and Sensing Systems; Signal Processing and Intelligent Networking in Challenging Environments; and Intelligent Communication, Networking, and Edge Computing Systems.Part II: Intelligent Communication, Networking, and Edge Computing Systems; Multi-Modal Perception and Intelligent Signal Analysis; Waveform Design, Electromagnetic Structures, and Signal Processing; and Interference-Aware and Secure Communication Techniques for Future Networks.Part III: Interference-Aware and Secure Communication Techniques for Future Networks; Array, Design, and Decision-Making in Complex Systems; and Learning-Based Signal Recognition, Estimation, and Perception.

This three-volume set LNICST 701-703 constitutes the refereed post-conference proceedings of the 15th EAI International Conference on Wireless and Satellite Systems, WiSATS 2025, held in Harbin, China during August 7–9, 2025.The 108 full papers presented in these volumes were carefully reviewed and selected from 274 submissions.They are organized into the following topical sections:Part I: Al-Enabled Communication and Sensing Systems; Signal Processing and Intelligent Networking in Challenging Environments; and Intelligent Communication, Networking, and Edge Computing Systems.Part II: Intelligent Communication, Networking, and Edge Computing Systems; Multi-Modal Perception and Intelligent Signal Analysis; Waveform Design, Electromagnetic Structures, and Signal Processing; and Interference-Aware and Secure Communication Techniques for Future Networks.Part III: Interference-Aware and Secure Communication Techniques for Future Networks; Array, Design, and Decision-Making in Complex Systems; and Learning-Based Signal Recognition, Estimation, and Perception.