| 利用均匀线阵实现高移动性通信系统中的多普勒补偿 |
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| 引用本文： | 张莹,殷勤业,穆鹏程.利用均匀线阵实现高移动性通信系统中的多普勒补偿[J].西安交通大学学报,2011,45(8):73-77,122. |
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| 作者姓名： | 张莹 殷勤业 穆鹏程 |
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| 作者单位： | 西安交通大学智能网络与网络安全教育部重点实验室,710049,西安 |
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| 基金项目： | 国家自然科学基金资助项目(6071113,61071216); 国家创新群体科学基金资助项目(600921003) |
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| 摘 要： | 为了消除高移动性正交频分复用系统中多普勒扩展引发的子载波间干扰,提出一种利用均匀线阵同时补偿多个多普勒频率的方法.该方法首先从空域的角度区分开具有不同多普勒频率的入射径,形成多个子信道,再分别对各个子信道进行多普勒补偿,最后对补偿后的子信道最大比合并,实现多普勒分集增益.子信道的时变性在多普勒补偿后变低,因此可以避免较为复杂的信道估计和均衡算法.仿真结果表明,在阵列孔径足够的情况下,该方法能有效对抗正交频分复用系统在高移动性环境下的误码率平台效应,较单天线接收方法有6~8 dB的信干比增益.
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| 关 键 词： | 多普勒扩展 载波间干扰 正交频分复用 均匀线阵 |
Doppler Compensation for High-Mobility Communication Systems Using Uniform Linear Array |
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| ZHANG Ying,YIN Qinye,MU Pengcheng.Doppler Compensation for High-Mobility Communication Systems Using Uniform Linear Array[J].Journal of Xi'an Jiaotong University,2011,45(8):73-77,122. |
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| Authors: | ZHANG Ying YIN Qinye MU Pengcheng |
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| Institution: | (MOE Key Laboratory for Intelligent Networks and Network Security,Xi′an Jiaotong University,Xi′an 710049,China) |
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| Abstract: | A scheme which employs uniform linear array and can compensate multiple Doppler shifts simultaneously is proposed to eliminate intercarrier interference caused by Doppler spreading in high-mobility orthogonal frequency division multiplexing systems.The scheme separates different paths with unique Doppler frequency in space-domain,and generates multiple sub-channels.The Doppler shift on each sub-channel is then corrected independently and finally,the compensated multiple sub-channels are combined together fo... |
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| Keywords: | Doppler spreading intercarrier interference orthogonal frequency division multiplexing uniform linear array |
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