| QAM-OFDM卫星通信系统PAPR抑制方法研究 |
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| 引用本文： | 张 琛,付耀文,张尔扬. QAM-OFDM卫星通信系统PAPR抑制方法研究[J]. 通信学报, 2006, 27(8): 67-72 |
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| 作者姓名： | 张 琛 付耀文 张尔扬 |
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| 作者单位： | 国防科学技术大学,电子科学与工程学院,湖南,长沙,410073 |
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| 摘 要： | 正交频分复用(OFDM)具有很高的频谱利用率和良好的抗多径衰落能力,是卫星通信备受关注的新技术之一。但OFDM信号峰值平均功率比(PAPR)较高的问题限制了其在卫星通信系统中的应用。针对卫星通信高数据率和高可靠性传输的要求,提出一种新的抑制QAM-OFDM信号PAPR的部分格状(PT)成形技术,分析了QAM-OFDM卫星通信系统在AWGN、频率选择性Rician衰落信道的误比特率性能。仿真实验表明,该技术不仅能有效降低QAM-OFDM信号PAPR,结合纠错编码还可大大改善OFDM卫星通信系统误比特率性能。
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| 关 键 词： | 卫星通信 部分格状成形 |
| 文章编号： | 1000-436X（2006）08-0067-06 |
| 收稿时间： | 2006-04-11 |
| 修稿时间： | 2006-06-09 |
Research on PAPR reduction scheme in QAM-OFDM satellite communication system |
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| ZHANG Chen,FU Yao-wen,ZHANG Er-yang. Research on PAPR reduction scheme in QAM-OFDM satellite communication system[J]. Journal on Communications, 2006, 27(8): 67-72 |
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| Authors: | ZHANG Chen FU Yao-wen ZHANG Er-yang |
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| Affiliation: | College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073,China |
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| Abstract: | Orthogonal frequency division multiplexing(OFDM)has high spectral efficiency and high tolerance to multi-path fading that make it a very attractive technique for satellite communication.But the problem of high peak-to-average power ratio(PAPR)of OFDM signal limits the application in satellite communication systems.In order to satisfy the re-quirements of high speed data rate and high reliability transmission of satellite communication,a novel PAPR reduction scheme for quadrature amplitude modulated(QAM)OFDM signal,namely partial trellis shaping was proposed and the BER performance of QAM-OFDM satellite communication system over AWGN,frequency selective Rician fading channel was analyzed.Simulation results show that the scheme can not only reduce the PAPR effectively,but also im-prove the system BER performance greatly when combing error control coding. |
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| Keywords: | QAM-OFDM PAPR |
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