Research on frequency allocation scheme in wireless communication system

With the development of communication, spectrum plays a more and more important role in the wireless system. So, in this paper, we research spectrum allocation problems in a wireless system. 1)we research some algorithms such as Simultaneous Water-Filling (SWF), fractional frequency reuse FFR. To increase the capacity or enhance the performance and achieve a good user experience, and improve spectral efficiency interference management, techniques like FFR or SWF with enhanced scheduling strategies are proposed. They are important and efficient in spectrum allocation. 2)We propose a method named SWF+FFR, which can improve the wireless system's capacity and improve the efficiency of the spectrum. In our method, the resource allocation in FFR is done for the users in the cell center (full reuse). As for users in the cell range expansion (partial reuse) regions, they depend on the optimum post processing signal to interference plus noise ratio threshold with different schedulers in the two regions. We demonstrate that the particular combination shows a better throughput performance than the popular and ordinary FFR scheme.