Subcarrier allocation and power control for OFDMA
Subcarrier allocation and power control for OFDMA
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DOI：
10.1109/acssc.2000.910933
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发表时间：
2000-10
期刊：
影响因子：
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通讯作者：
D. Kivanç;Hui Liu
中科院分区：
文献类型：
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作者：
D. Kivanç;Hui Liu
研究了在基于OFDM的无线系统中，多用户下行通信的子载波和功率分配问题。我们制定的问题，最大限度地减少总功耗的BER和传输速率的限制，为用户需要不同类别的服务，并得出简单的算法，表现良好。我们将联合分配的大问题分为两个步骤。在第一步中，基于用户的平均SNR来确定每个用户的子载波的数量。数值结果表明，所提出的低复杂度算法提供了与现有的迭代算法相当的性能。
We study the problem of finding an optimal subcarrier and power allocation strategy for downlink communication to multiple users in an OFDM based wireless system. We formulate the problem of minimizing total power consumption with constraints on BER and transmission rate for users requiring different classes of service, and derive simple algorithms which perform well. We divide the larger problem of joint allocation into two steps. In the first step, the number of subcarriers that each user is determined based on the users' average SNR. Numerical results demonstrate that the proposed low complexity algorithms offer comparable performance with an existing iterative algorithm.