Interferecne mitigation method in orthogonal frequency division muliple access based cellura system

An interference mitigation method of a cellular system based on orthogonal frequency division multiple access is provided to improve spectrum efficiency of a cell boundary user by removing interference between cells using a multiple receiving antenna and a spreading code. A radio resource is divided into a resource group for reusing a partial frequency and a resource group for removing interference between cells(S910). The resource group for reusing a partial frequency is redivided into detailed resource groups as the number of cells for reusing a partial frequency(S920). The resource group for removing the interference between the cells in redivided into detailed resource groups according to spreading coefficient(S930). A resource of the resource group according to the spreading coefficient is allocated according to a performance requirement of a down-link control channel(S950). Each transmitting data symbol is spread to a spreading code vector coupled with each unit resource, and is transmitted by using a base resource which forms a corresponding unit resource(S960). A data symbol is restored according to the spreading coefficient by receiving desired signals or interference signals(S970).