一种上行MIMO-OFDM系统的载波和功率分配算法

Subcarrier and power allocation algorithm for uplink MIMO-OFDM systems

针对上行空分多址MIMO-OFDM系统的无线资源分配问题,建立了更加符合实际情况的整数优化模型,并提出一种同时分配子载波和发射功率的算法.仿真结果表明,所提的算法比传统算法能够获得更大的系统吞吐量.此外,所提算法获得的系统吞吐量随着天线数的增加而增加,而且基站接收天线数的增加比移动台天线数的增加带来更明显的空间分集增益.所以,为了提高系统吞吐量,可以为基站配置较多的接收天线,而为移动台配置较少的发射天线.

An integer optimization model which more accords to the fact is established and an algorithm allocating subcarrier and power simultaneously is proposed for uplink MIMO-OFDM（ multipleinput multiple-output orthogonal frequency division multiple） systems. Simulation results show that the algorithm proposed can give larger throughput than previous algorithms. Furthermore, the throughput increases with the number of antennas, and when using the proposed algorithm the space diversity gain gotten by enlarging the antenna number of base-station is larger than that by enlarging the antenna number of mobile-station. Therefore, in order to improve the performance, the antenna number in base-station should be more than that in mobile stations.