| 摘要: |
| 本文提出了一种多用户OFDM系统中次最优的自适应载波、比特和能量分配算法。此算法利用各子载波的瞬时特性,在保证各个用户服务质量(QoS)的前提下,通过合理地分配子载波并调整各个子载波调制等级,达到降低总发射功率的目的。该算法相对于最优算法具有简单、公平、高效的特点。仿真实验表明,该算法的性能接近最优算法。 |
| 关键词: 多用户系统 正交频分复用 自适应调制 子载波分配 |
| DOI：10.3969/j.issn.1001-893X. |
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| 基金项目:国家高技术研究发展计划(863计划) |
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| A Suboptimal Allocation Algorithm for Multiuser OFDM System |
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| Abstract: |
| An adaptive subcarrier, bit and power allocation suboptimal algorithm for OFDMA system is proposed. The resource allocation problem of assigning a set of subcarriers and determining the number of bits to be transmitted for each subcarrier is considered.The algorithm has the features of simplicity, fairness and efficiency compared with the optimal one. The simulation results show that the performance of approach is close to that of optimal algorithm. |
| Key words: Multiuser system,OFDM,Adaptive modulation,Subcarrier allocation |
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