摘要
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。
To minimize the total transmission power , ensure each user＇s fairness and QoS requirements, an improved adaptive dynamic resource allocation scheme is proposed, which is based on singular value decomposition of MIMO - OFDM system. The proposed algorithm exploits all the non - zero spatial subchannels to transmit the data. The subearrier is assigned to the user which has the largest sum of all the subchannels gain successively. Then, we should adjust suhearrier until all users are satisfied with the number of carriers which is not less than the minimum required ones. Simulation results show that the proposed algorithm can reduce the system transmission power.
出处
《无线通信技术》
2013年第1期1-5,共5页
Wireless Communication Technology
