I. Introduction
The ever-increasing number of mobile subscribers and thriving demands for data services have triggered the development of the fourth generation of cellular technologies. Among the standards proposed for this new generation, Wireless Interoperability for Microwave Access (WiMAX) and Long Term Evolution (LTE) have attracted large attention from both the mobile industry and the research community [1], [2]. These two standards are both based on a DownLink (DL) Orthogonal Frequency Division Multiple Access (OFDMA) physical layer, thus sharing a large number of features and challenges at the physical and medium access control layers. For instance, inter-cell interference is one of the main capacity limiting factor, and poses a serious threat to efficient network operation [3], [4].