| OFDM系统中自适应比特和功率分配研究 |
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| 引用本文： | 高俊磊. OFDM系统中自适应比特和功率分配研究[J]. 数字社区&智能家居, 2007, 0(10): 146-147,153 |
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| 作者姓名： | 高俊磊 |
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| 作者单位： | 南京邮电大学光电工程学院,江苏南京210003 |
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| 摘 要： | 提出了一种改进的OFDM系统中自适应比特功率分配算法。该算法可适用于多径频率选择性衰落信道,根据信道特征,动态地为OFDM系统的各子信道分配比特和发送功率。该算法在一定的误比特率和信息速率的情况下,使得总发送功率最小化。仿真结果表明,该算法在相同误比特率的情况下比不采用自适应技术的OFDM系统节省了发送功率。
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| 关 键 词： | OFDM 自适应 比特功率分配 |
| 文章编号： | 1009-3044（2007）19-40146-02 |
| 收稿时间： | 2007-09-10 |
Adaptive Bit and Power Allocation Algorithm for OFDM System |
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| GAO Jun-lei. Adaptive Bit and Power Allocation Algorithm for OFDM System[J]. Digital Community & Smart Home, 2007, 0(10): 146-147,153 |
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| Authors: | GAO Jun-lei |
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| Abstract: | This paper proposes adaptive bit and power allocation algorithm for frequency division OFDM system, which can be used over multipath frequency selective fading channels. The adaptive algorithm assigns the bits and power to the subchannels, According to the subcarrier gains to minimize the total transmission power for a given bit error rate. The simulation results show that the proposed adaptive system save power compared with non-adaptive systems. |
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| Keywords: | OFDM adaptive bit and power allocation |
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