| 信道估计误差对功率分配算法的影响分析 |
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| 引用本文： | 俞苗亮,李有明. 信道估计误差对功率分配算法的影响分析[J]. 计算机仿真, 2008, 25(9) |
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| 作者姓名： | 俞苗亮 李有明 |
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| 作者单位： | 宁波大学通信技术研究所,浙江宁波,315211 |
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| 基金项目： | 浙江省自然科学基金，浙江省宁波市自然科学基金，华为技术公司DSM项目 |
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| 摘 要： | 自适应功率分配技术可以最大限度提高OFDM传输系统的信道容量和传输质量.是多用户OFDM系统中的关键技术.分析和比较了非理想信道估计情况下,信道估计误差对当前三种主要OFDM适应功率分配算法性能的影响.仿真结果表明,无论是理想信道估计还是存在误差的非理想信道估计条件下.理想频谱平衡算法和迭代频谱平衡算法的性能总是优于迭代注水算法.但是,随着信道估计误差的不断增大,迭代注水算法的性能具有较好的稳健性.对设计实际系统有重要的指导意义.
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| 关 键 词： | 功率分配 信道估计 正交频分复用 |
The Effect of Channel Estimation Errors on Power Allocating Algorithms |
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| YU Miao-liang,LI You-ming. The Effect of Channel Estimation Errors on Power Allocating Algorithms[J]. Computer Simulation, 2008, 25(9) |
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| Authors: | YU Miao-liang LI You-ming |
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| Affiliation: | YU Miao-liang,LI You-ming(Institute of Communication Technology,Ningbo University,Ningbo Zhejiang 315211,China) |
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| Abstract: | Adaptive power allocating plays a key role for achieving high bit rate in multi-user OFDM systems.This paper evaluates and compares the effect of channel estimation errors on adaptive power allocating algorithms for multicarrier transmission systems.Computer simulation results reveal that OSB and ISB algorithms have superior performance as compared to IWF algorithm with either perfect or imperfect channel knowledge.Further results also demonstrate that IWF algorithm is robust in the presence of channel esti... |
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| Keywords: | Power allocating Channel estimation Orthogonal frequency division multiplexing(OFDM) |
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