| 衰落信道下基于正交频率码分复用的精确时间测量 |
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| 引用本文： | 高凯,朱江,邹建彬,张炜,周资伟.衰落信道下基于正交频率码分复用的精确时间测量[J].国防科技大学学报,2016,38(6):148-153. |
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| 作者姓名： | 高凯 朱江 邹建彬 张炜 周资伟 |
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| 作者单位： | 国防科大四院 |
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| 摘 要： | 针对衰落信道下的精确时间测量,给出基于正交频率码分复用技术的高精度时间测量算法。在不降低最大不模糊时间的前提下,通过时间延时、信道衰落、相位噪声参数的联合迭代估计,有效克服了频率选择性信道的衰落与相位噪声对时间测量的影响。仿真结果表明:联合迭代算法提高了时间测量的归一化均方根误差性能。
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| 关 键 词： | 正交频率码分复用 分集 扩频 时间测量 |
| 收稿时间： | 5/6/2015 12:00:00 AM |
OFCDM-Based Precise Time Measurement in Fading Channel |
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| GAO Kai,ZHU Jiang,ZOU Jianbin,ZHANG Wei and ZHOU Ziwei.OFCDM-Based Precise Time Measurement in Fading Channel[J].Journal of National University of Defense Technology,2016,38(6):148-153. |
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| Authors: | GAO Kai ZHU Jiang ZOU Jianbin ZHANG Wei and ZHOU Ziwei |
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| Institution: | College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China,College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China,College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China,College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China and College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | A novel communication system based on orthogonal frequency and code division multiplexing is proposed for precise time measurement in the fading channel, and a novel iterative algorithm is proposed to improve the performance caused by the fading channel and phase noise without decreasing the maximum unambiguous time. In the scheme, the coefficients of fading channel and the phase noise are jointly estimated with the time delay. It is shown both by theory and computer simulations that the proposed scheme can effectively mitigate the time estimation error caused by fading channel and phase noise. |
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| Keywords: | OFCDM Diversity Spread Spectrum Time Measurement |
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