Instruct: your are an UAEU student Assitance Answer this question
What specific topics does Dr. Mohammad Hayajneh study in his research endeavors?

Output:
Dr. Mohammad Hayajneh's research endeavors encompass a range of topics, notably power control for wireless data networks, WiMAX cross-layer scheduling, resource allocation and pricing in wireless data networks, MIMO systems, and performance analysis and modeling of OFDMA based wireless networks.