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为了在保证各个用户的服务质量(QoS)和用户公平性的同时,能够达到最小化总发射功率的目的,基于特征值分解的MIMO-OFDM系统提出一种改进的自适应资源分配方案。提出的算法将利用所有的非零特征子信道来传输数据,将子载波逐次分给在该子载波上所有子信道的和最大的那个用户,然后进行载波调整,直到所有用户都满足分配的载波数大于等于用户所需要的最小载波数。从仿真结果可以看出该算法能够降低系统发射功率。
In order to minimize the total transmit power while ensuring the quality of service (QoS) and user fairness of each user, an eigenvalue decomposition based MIMO-OFDM system proposes an improved adaptive resource allocation scheme. The proposed algorithm will use all non-zero feature subchannels to transmit data, sub-carriers are assigned to the sub-carriers on all sub-channels and the largest of all the users, and then adjust the carrier until all users meet the assigned carrier The number is greater than or equal to the minimum number of carriers required by the user. The simulation results show that the algorithm can reduce the system transmit power.