A Power Allocation Scheme of Sub-carriers over Interference for Down-link OFDMA System

摘要

PURPOSE: A method of allocating power a downlink sub carrier due to interference in a downlink OFDMA(Orthogonal Frequency Division Multiple Access) system is provided to induce an unequal environment of interference when interference due to another adjacent user is large at a cell boundary or in a wireless communication system, thereby improving receiving performance. CONSTITUTION: A base station produces an interference value about each subscriber terminal(S10). A cell interference value in a sub carrier about frames is distributed(S20). The frames include a current frame. The frames are frames in a section corresponding to a size of a sliding window. A pseudo random pattern is generated to make unequal power of the carrier. Power due to the generated pseudo random pattern is allocated to the sub carrier(S30). Each terminal performs SINR(Signal to Interference and Noise Ratio) weighting through interference estimation(S40).