| 摘要: |
| 提出了两种多用户OFDM系统下行链路的自适应功率分配算法.通过进一步放松不同用户之间数据速率比例性要求,提出的新算法提高了功率使用效率.实验仿真表明:在降低计算复杂度的同时,大大提高了系统容量,并且也近似满足了不同用户之间数据速率比例性要求. |
| 关键词: 正交频分复用 自适应资源分配 公平性 注水算法 |
| DOI：10.3969/j.issn.1001-893X. |
| Received:July 14, 2006Revised:October 08, 2006 |
| 基金项目:国家自然科学基金
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日本夏普公司资助项目 |
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| Relaxation Algorithms for Adaptive Power Allocation in Multiuser OFDM Systems with Proportional Fairness Requirement |
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| Abstract: |
| Two low complexity algorithms for adaptive power allocation in OFDM systems are proposed in this paper to achieve a higher capacity. Compared to existing adaptive resource allocation algorithms, the proposed schemes can use the power more efficiently through relaxing the proportional rate constraints and hence achieving a higher total capacity and acceptable fairness among users, while requiring significantly less computation. |
| Key words: OFDM adaptive resource allocation proportional fairness water- filling algorithm |
