EFFICIENT RESOURCE ALLOCATION FOR THE MULTI-USER MIMO-OFDM SYSTEM WITH MMSE-SIC RECEIVER

摘要

PURPOSE: An efficient resource assignment technique in a multi-user multiple-input multiple-output-orthogonal frequency division multiplexing (MIMO-OFDM) system based on minimum mean square error-successive interference cancellation (MMSE-SIC) is provided to improve frequency efficiency and transmission reliability. CONSTITUTION: An effective channel vector is obtained from a subcarrier of user K by using a null space of a selected user group. A data transfer rate is obtained from the subcarrier of the user K by using the effective channel vector. Transmission power of the subcarrier, which is assigned by using a water-filling method, is obtained after assigning the subcarrier.