基于IEEE802.11ad的OFDM线性拟合频偏估计
发布时间：2018-09-19 10:07
【摘要】：提出了一种基于IEEE802.11ad的正交频分复用(OFDM)频偏估计算法,该算法将接收到的训练序列与本地保存的训练序列共轭相乘,对其相位角进行线性拟合,得到的斜率经过简单计算即得归一化频偏.通过数据消噪和分组对算法进一步改进,使得低信噪比下的估计性能得到改善.Matlab仿真表明:在高斯(加性高斯白噪声)信道和60GHz多径信道下,改进的线性拟合方法性能稳定,频偏估计精度比传统的时频域估计高1个数量级,当信噪比为0dB时,频偏估计的均方差达到10-4数量级,从而满足了OFDM系统的技术要求.
[Abstract]:An orthogonal frequency division multiplexing (OFDM) frequency offset estimation algorithm based on IEEE802.11ad is proposed. The received training sequence is conjugated with the locally preserved training sequence, and the phase angle is fitted linearly. The slope is calculated simply to get the normalized frequency offset. By further improving the algorithm of data de-noising and grouping, the performance of estimation under low SNR is improved. MATLAB simulation shows that the performance of the improved linear fitting method is stable in Gao Si (additive Gao Si white noise) channel and 60GHz multipath channel. The accuracy of frequency offset estimation is one order of magnitude higher than that of traditional time-frequency estimation. When the SNR is 0dB, the RMS of frequency offset estimation reaches 10-4 order of magnitude, which satisfies the technical requirements of OFDM system.
【作者单位】： 南开大学电子信息与光学工程学院;南开大学天津市信息光子材料与技术重点实验室;
【基金】：高等学校博士学科点专项科研基金资助项目(20110031110028) 天津市应用基础与前沿技术研究计划资助项目(13JCZDJC26000,13JCQNJC01000)
【分类号】：TN929.53
[Abstract]:An orthogonal frequency division multiplexing (OFDM) frequency offset estimation algorithm based on IEEE802.11ad is proposed. The received training sequence is conjugated with the locally preserved training sequence, and the phase angle is fitted linearly. The slope is calculated simply to get the normalized frequency offset. By further improving the algorithm of data de-noising and grouping, the performance of estimation under low SNR is improved. MATLAB simulation shows that the performance of the improved linear fitting method is stable in Gao Si (additive Gao Si white noise) channel and 60GHz multipath channel. The accuracy of frequency offset estimation is one order of magnitude higher than that of traditional time-frequency estimation. When the SNR is 0dB, the RMS of frequency offset estimation reaches 10-4 order of magnitude, which satisfies the technical requirements of OFDM system.
【作者单位】： 南开大学电子信息与光学工程学院;南开大学天津市信息光子材料与技术重点实验室;
【基金】：高等学校博士学科点专项科研基金资助项目(20110031110028) 天津市应用基础与前沿技术研究计划资助项目(13JCZDJC26000,13JCQNJC01000)
【分类号】：TN929.53
【参考文献】
相关期刊论文 前3条
1 董孝东;;基于FFT的突发通信载波大频偏估计算法[J];现代电子技术;2013年01期
2 张力;汪涵;高丹;王营冠;;OFDM系统中利用CAZAC序列的时域时频同步方案[J];现代电子技术;2013年05期
3 Sai Shankar N;Debashis Dash;Hassan El Madi;Guru Gopalakrishnan;;WiGig and IEEE 802.11ad for Multi-Gigabyte-Per-Second WPAN and WLAN[J];ZTE Communications;2012年04期
【共引文献】
相关期刊论文 前4条
1 孟庆萍;周新力;田伟;;基于FFT和长时延自相关函数的频偏估计方法[J];计算机工程与设计;2013年03期
2 杨永斌;;计算机网格技术在数字图书馆建设中的应用探讨[J];重庆工商大学学报(自然科学版);2010年05期
3 孙s，
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