| 抗多普勒频移的Ka频段FRFT-OFDM系统及其均衡 |
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| 引用本文： | 申勇,达新宇,曾武,谢铁城.抗多普勒频移的Ka频段FRFT-OFDM系统及其均衡[J].重庆邮电大学学报(自然科学版),2012,24(1):45-49. |
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| 作者姓名： | 申勇 达新宇 曾武 谢铁城 |
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| 作者单位： | 空军工程大学电讯工程学院,陕西西安,710077 |
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| 基金项目： | 国家自然科学基金资助项目(6972042)；陕西省自然科学基金资助项目(2009JM8001-3) |
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| 摘 要： | 针对多普勒频移严重影响Ka频段正交频分复用(orthogonal frequency division multiplexing,OFDM)系统传输性能的问题,提出使用分数阶傅里叶变换(fractional Fourier transform,FRFT)的方法.将多普勒频移引入Ka频段移动卫星信道模型,通过选取不同环境...
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| 关 键 词： | Ka频段 正交频分复用(OFDM) 分数阶傅里叶变换 信道均衡 多普勒频移 |
| 收稿时间： | 3/8/2011 12:00:00 AM |
A FRFT-OFDM system and equalization in Ka-band for Doppler effect elimination |
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| SHEN Yong,DA Xin-yu,ZENG Wu,XIE Tie-cheng.A FRFT-OFDM system and equalization in Ka-band for Doppler effect elimination[J].Journal of Chongqing University of Posts and Telecommunications,2012,24(1):45-49. |
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| Authors: | SHEN Yong DA Xin-yu ZENG Wu XIE Tie-cheng |
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| Institution: | Telecommunication Engineering Institute, Air Force Engineering University, Xi'an 710077, P.R.China |
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| Abstract: | Concerning the negative influence of Doppler shift on OFDM system in Ka-band, FRFT-OFDM system is proposed. A mobile satellite channel model in Ka-band with Doppler shift is established. After the optimal orders of FRFT in different conditions being selected, the advantage of this system on anti-Doppler-shift is analyzed. The system is equalized both in fractional Fourier domain and Fourier domain. The simulation results show that 1)the more serious Doppler shift is, the more obviously this system performance would be improved; 2)the proposed system under optimal order has better performance of equalization than the traditional system in different conditions. |
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| Keywords: | Ka-band orthogonal frequency division multiplexing(OFDM) fractional Fourier transform(FRFT) channel equalization Doppler shift |
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