| 基于IEEE802.15.3c的OFDM超宽带系统时频同步算法 |
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| 引用本文： | 薛茜男,戈立军,陶进,李月,赵鹤.基于IEEE802.15.3c的OFDM超宽带系统时频同步算法[J].北京理工大学学报,2017,37(1):77-82,92. |
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| 作者姓名： | 薛茜男 戈立军 陶进 李月 赵鹤 |
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| 作者单位： | 1. 中国民航大学 天津市民用航空器适航与维修重点实验室, 天津 300300; |
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| 基金项目： | 国家自然科学基金青年基金项目（61302062）；天津市应用基础及前沿技术研究计划青年基金项目（13JCQNJC00900）；天津市民用航空器适航与维修重点实验室开放基金项目（1040030205） |
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| 摘 要： | 针对IEEE802.15.3c标准规定的60 GHz OFDM超宽带系统，通过算法改进与仿真，给出基于前导序列及导频的完整时频同步算法方案.提出基于格雷互补序列的抗多径分离滑动相关检测方法（SSCD），并对多个相关峰位置取平均以增加定时抗噪能力.提出相位均衡结合整数倍样值偏差预修正的采样频率同步方法（PE-ISDPC），利用循环前缀的容忍性吸收整数倍样值偏差以降低实现复杂度.仿真结果表明，系统具有良好的时频同步性能，且整体方案具有较低的复杂度.
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| 关 键 词： | 超宽带 正交频分复用 同步 定时 载波频偏 采样频偏 |
| 收稿时间： | 2015/4/28 0:00:00 |
Time and Frequency Synchronization Algorithms for OFDM-UWB System Based on IEEE802.15.3c Standard |
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| XUE Qian-nan,GE Li-jun,TAO Jin,LI Yue and ZHAO He.Time and Frequency Synchronization Algorithms for OFDM-UWB System Based on IEEE802.15.3c Standard[J].Journal of Beijing Institute of Technology(Natural Science Edition),2017,37(1):77-82,92. |
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| Authors: | XUE Qian-nan GE Li-jun TAO Jin LI Yue and ZHAO He |
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| Institution: | 1. Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance, Civil Aviation University of China, Tianjin 300300, China;2. School of Electronics and Information Engineering, Tianjin Polytechnic University, Tianjin 300387, China |
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| Abstract: | In this paper, an intact time and frequency synchronization scheme was presented based on the preamble and the pilots for the OFDM UWB system specified in the IEEE802.15.3c standard. An anti-multipath separated sliding correlation detection (SSCD) method was proposed based on the Gray complementary sequences, and the positions of the correlation peaks were averaged to increase the anti-noise capability of timing. A sampling frequency synchronization method was also presented for doing phase equalization combined with integer sampling deviation pre-correction (PE-ISDPC), which could exploit the tolerance of the cyclic prefix to the integer sample deviation, reducing the implementation complexity. Simulation results show that the system has a better performance of time and frequency synchronization, and the complexity of overall scheme is low. |
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| Keywords: | UWB OFDM synchronization timing carrier frequency offset sampling frequency offset |
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