Dr. Abd Rahman is a Senior Lecturer with Department of Physics Universiti Putra Malaysia. He gained BSc in Electrical Engineering from Purdue University, West Lafayette, United States. He also obtained an MSc degree in Sensor and Instrumentation from Universiti Putra Malaysia. He is the first person that was awarded with a joint (co-tutelle) PhD degree between University of Sheffield, United Kingdom and Universiti Putra Malaysia. During PhD studies, he worked on developing new algorithms for multi-floor indoor localization system and also proposing new approach in indoor localization system based on WLAN. I has also joined Alcatel-Lucent Bell Labs (now Nokia Bell Labs), Dublin, Ireland as a post-graduate research intern to carried out research and working with research team on co-localization and tracking algorithm for WLAN networks. He have also served as an invited researcher in Bell Labs Antwerp, Belgium to apply the localization system for Bell-Labs Future-X day. He currently lead the research in indoor localization within radio frequency and microwave research group. His other research interests includes signal processing, pattern recognition/ matching/ prediction, machine learning algorithms, electromagnetics-related computation and modelling and RF and microwave based sensor system. He also serves as reviewer for many high-impact journals especially in the area of Artificial Intelligence and Machine Learning.