Systems and methods are described for a method of operating a wireless communication device includes receiving a physical downlink control channel (PDCCH) including a plurality of control channel elements (CCE), storing a plurality of LLRs generated by demodulating the PDCCH in a data buffer, storing at least one address of the LLRs, corresponding to a plurality of PDCCH candidates in accordance with an aggregation level for the CCEs, in a plurality of address buffers, and performing blind decoding on the PDCCH candidates by using the data buffer and the address buffers.