| 降低OFDM信号峰均功率比的研究 |
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| 引用本文： | 胡迎刚,路云.降低OFDM信号峰均功率比的研究[J].四川大学学报(自然科学版),2009,46(6):1655-1658. |
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| 作者姓名： | 胡迎刚 路云 |
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| 作者单位： | 1. 四川大学电子信息学院,成都,610064;四川师范大学成都学院,成都,644007
2. 四川师范大学成都学院,成都,644007 |
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| 摘 要： | OFDM系统的一大缺点就是有较高的峰值平均功率比(PAPR),大大降低了线性功率放大器的效率。本文提出一种用预编码(Precoding method)的方法来降低OFDM信号的PAPR，引入预编码矩阵将映射后的数据进行功率分配，从而达到降低PAPR的目的。该方法不影响频谱效率，不需要进行附加运算以及收发两端的握手信息。计算机仿真表明对传统的64个子载波OFDM系统PAPR有将近9dB的改善。
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| 关 键 词： | 峰值平均功率比 正交频分复用 预编码 根升余弦窗 |
| 修稿时间： | 3/10/2009 4:52:51 PM |
Research of reducing the Peak-to- Average Power Ratio of OFDM signal |
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| HU Ying-Gang and LU Yun.Research of reducing the Peak-to- Average Power Ratio of OFDM signal[J].Journal of Sichuan University (Natural Science Edition),2009,46(6):1655-1658. |
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| Authors: | HU Ying-Gang and LU Yun |
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| Institution: | School of Electronics and Information Engineering, Sichuan University;Chengdu College, Sichuan Normal University |
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| Abstract: | Abstract: The shortcoming of OFDM system is the high peak-to-average power ratio (PAPR) which greatly reduced the efficiency of the High Power Amplifier (HPA). This article proposes a new method to reduce PAPR, by using precoding matrix to redistribute the powerd istribution of the input sequence and then reduce the PAPR of OFDM signal. This method does not have any additional computations and shake-hand information at both transmitter and receiver. It achieves 9dB improvement compared to the conventional OFDM system with 64 subcarriers. |
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| Keywords: | PAPR OFDM Precoding RRC |
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