Adaptive Resource Allocation Algorithm Resarch In MIMO-OFDM Systems
In this paper,an adaptive modulation algorithm is proposed in order to minimize the total transmission power under given BER and satisfy the fixed transmission rate in MIMO-OFDM systems.For this purpose,and adaptive algorithm with low complexity is described,and the modifications on power allocation and step-size load of Hughes-Hartogs and variable step-bit algorithms are implemented.The simulation results show that,by the modified algorithm,the MIMO-OFDM system is improved in performance while is reduced in complexity.