研究了一种针对多用户 MIMO-OFDM 系统的资源分配算法。该算法是在保证用户公平性的前提下，基于发射功率最小化对系统进行子载波和比特分配。首先按照用户信道增益状况由最差到最好的顺序进行子载波的初次分配，之后再比较其功率大小找到最终适合用户的子载波，最后利用贪婪注水法对子载波进行比特分配。仿真结果表明，算法降低了系统的发射功率，并提高了系统的性能。%The resource allocation algorithm in multi-user multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems has been studied. The user’s fairness is ensured in this algorithm, and based on minimum transmitting power to allocate the sub-carriers and the bits in system. The sub-carriers’ first allocation is done according to the user’s channel gain under the order from worst to best. And then, by comparing their powers to find the most suitable sub-carriers ultimately. Finally, the greedy water-filling algorithm is used to allocate bits for the sub-carrier. Simulation results have shown that the transmitting power can be decreased and the system performance has been improved.
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