| 利用星座扩展降低OFDM PAPR的新方法 |
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| 引用本文： | 尹志伟,万毅. 利用星座扩展降低OFDM PAPR的新方法[J]. 国际商务研究, 2010, 50(5) |
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| 作者姓名： | 尹志伟 万毅 |
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| 作者单位： | 兰州大学 信息科学与工程学院，兰州 730000;兰州大学 信息科学与工程学院，兰州 730000 |
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| 摘 要： | 通过研究利用星座扩展降低OFDM中峰均功率比(PAPR)的方法，提出了一种寻找次最优映射向量的新方法——联合搜索(JS)算法。该算法联合相邻的若干子载波，通过比较局部的峰值大小搜索次最优映射向量。仿真结果表明，JS算法在降低计算复杂度、提高PAPR抑制增益以及增强应用灵活性等方面都有明显改进。
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| 关 键 词： | 正交频分复用；峰均功率比；星座扩展；联合搜索算法 |
A New PAPR Reduction Method via Constellation Extension for OFDM |
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| YIN Zhi-wei and WAN Yi. A New PAPR Reduction Method via Constellation Extension for OFDM[J]. International Business Research, 2010, 50(5) |
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| Authors: | YIN Zhi-wei and WAN Yi |
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| Affiliation: | School of Information Science and Engineering, Lanzhou University, Lanzhou 730000,China;School of Information Science and Engineering, Lanzhou University, Lanzhou 730000,China |
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| Abstract: | Through investigating the PAPR(Peak to Average Power Ratio) reduction method via constellation extension, a new method is proposed to find a suboptimal constellation mapping solution,the joint searching (JS) algorithm. The method searches the suboptimal mapping by combining several adjacent sub carriers and comparing the local peak value. Simulation results show that JS method performs better in the aspects of computational complexity, PAPR suppression performance and application flexibility. |
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| Keywords: | OFDM PAPR constellation extension joint searching algorithm |
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