۱- Signal Processing in Engineering
۲- Communication systems 

Related topics:

.Integrated Sensing & Communication (ISAC)
۲. Semantic Communication
۳. Blind Sourse Seperation
۴. Active Noise Control
۵. Compressed Sensing
۶. Matrix Completion
۷.  Optimization Problems 
۸. Array Signal Processing
۹. Target DOA Estimation, Localization. & Tracking
۱۰. Wireless Sensor Networks (WSN)
۱۱. ISAR
۱۲. Hyperspectral Imaging 
۱۳. Radar Signal Processing