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| 一种改进的OFDM/OQAM系统信道估计算法 | |
| 引用本文： | 程国兵,肖丽霞,肖悦,李少谦.一种改进的OFDM/OQAM系统信道估计算法[J].电子与信息学报,2012,34(2):427-432. |
| 作者姓名： | 程国兵 肖丽霞 肖悦 李少谦 |
| 作者单位： | 1. 电子科技大学通信抗干扰技术国家级重点实验室 成都611731;空军工程大学电讯工程学院 西安710077 2. 电子科技大学通信抗干扰技术国家级重点实验室 成都611731 3. 电子科技大学通信抗干扰技术国家级重点实验室 成都611731;东南大学移动通信国家重点实验室 南京210096 |
| 基金项目： | 东南大学移动通信国家重点实验室开放研究基金，中国瑞典国际科技合作项目，国家部级基金和电子科技大学中央高校基本科研项目 |
| 摘 要： | 基于块状导频的信道估计方法可以克服OFDM/OQAM(OFDM/Offset QAM)系统所固有的符号间和载波间干扰,从而成为该类系统通用的信道估计方法。该文基于块状导频结构和OFDM/OQAM的系统特点,分析了系统相邻子载波之间的相关性,并在此基础上提出一种改进的信道估计算法,通过计算相邻子载波的相关系数,在频域进行有效的加权运算来降低干扰和噪声对信道估计的影响。分析和仿真结果表明,该算法能够有效地提高传统算法的信道估计精度和系统性能。 |
| 关 键 词： | 无线通信 正交频分复用 偏移正交幅度调制 信道估计 子载波相关性 |
An Improved Channel Estimation Algorithm for OFDM/OQAM Systems |
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| Cheng Guo-bing , Xiao Li-xia , Xiao Yue , Li Shao-qian.An Improved Channel Estimation Algorithm for OFDM/OQAM Systems[J].Journal of Electronics & Information Technology,2012,34(2):427-432. | |
| Authors: | Cheng Guo-bing Xiao Li-xia Xiao Yue Li Shao-qian |
| Affiliation: | Cheng Guo-bing①③ Xiao Li-xia① Xiao Yue①② Li Shao-qian① ①(National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China,Chengdu 611731,China) ②(Notional Mobile Communications Research Laboratory,Southeast Univesity,Nanjing 210096,China) ③(Institute of Telecommunication Engineering,Air Force Engineering University,Xi’an 710077,China) |
| Abstract: | Since preamble-based channel estimation method can overcome the intrinsic inter-symbol interference and inter-carrier interference in OFDM/Offset QAM(OFDM/OQAM) system,it becomes the commonly used structure in similar systems.In this paper,according to the pilot structure and the characteristic of OFDM/ OQAM signal,the correlation between the adjacent sub-carriers is analyzed,and in turn an improved channel estimation algorithm is proposed.Through calculating the correlation coefficient between the adjacent subcarriers,weighting operation is carried out in frequency domain to reduce the effect of interference and noise on channel estimation.Analysis and simulation results demonstrate that this algorithm can effectively improve both channel estimation accuracy and system performances of traditional ones. |
| Keywords: | Wireless communication Orthogonal Frequency Division Multiplex(OFDM) Offset QAM(OQAM) Channel estimation Subcarrier correlation |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |