Symbol timing estimation for physical-layer network coding

被引：0

作者：

Dang, Xiao-Yu ^{[1
]}

Li, Qiang ^{[1
]}

Yu, Xiang-Bin ^{[1
]}

Wang, Xu-Dong ^{[1
]}

机构：

[1] College of Electronic Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing

来源：

Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology | 2015年 / 37卷 / 07期

关键词：

Modified Cramer-Rao Bound (MCRB); Physical-layer network coding; Symbol timing estimation; Two-way relay channels; Wireless communication;

D O I：

10.11999/JEIT141364

中图分类号：

学科分类号：

摘要：

Most of the existing research on Physical-layer Network Coding (PNC) is based on the assumption that the symbol timing at the relay is ideally synchronized, and rarely discusses the issue of symbol synchronization. However, in practice, the symbol timing is indispensable in PNC systems. To tackle this problem, this paper proposes a novel symbol timing estimation scheme based on the orthogonal training sequences for PNC in two-way relay channels. According to the maximum-likelihood estimation criterion, a Discrete Fourier Transformation (DFT) based interpolation algorithm is applied to improve the estimation accuracy. It is shown by analysis and simulation that the proposed DFT-based symbol timing estimator exhibits superior performance. The Mean Square Error (MSE) performance of the estimator is one order of magnitude better than that of the conventional optimum sample algorithm for Signal-to-Noise Ratio (SNR) greater than 10 dB, and is very close to the Modified Cramer-Rao Bound (MCRB). ©, 2015, Science Press. All right reserved.

引用

页码：1569 / 1574

页数：5

共 16 条

[1]

Zhang S., Liew S.C., Lam P.P., Hot topic: physical-layer network coding, Proceedings of the 12th Annual International Conference on Mobile Computing and Networking, pp. 358-365, (2006)

[2]

Liew S.C., Zhang S., Lu L., Physical-layer network coding: tutorial, survey, and beyond, Physical Communication, 6, pp. 4-42, (2013)

[3]

Sha N., Gao Y.-Y., Yi X.-X., Et al., Physical-layer network coding based on CPFSK modulation detection and performance analysis, Journal of Electronics & Information Technology, 36, 6, pp. 1454-1459, (2014)

[4]

Namboodiri V., Venugopal K., Rajan B.S., Physical layer network coding for two-way relaying with QAM, IEEE Transactions on Wireless Communications, 12, 10, pp. 5074-5086, (2013)

[5]

Ji X.-D., Zheng B.-Y., Opportunistic relaying and outage analysis for physical-layer network coding, Journal of Electronics & Information Technology, 33, 5, pp. 1186-1192, (2011)

[6]

Yang T., Yuan X., Ping L., Et al., A new physical-layer network coding scheme with eigen-direction alignment precoding for MIMO two-way relaying, IEEE Transactions on Communications, 61, 3, pp. 973-986, (2013)

[7]

Duc Hiep V., Van Bien P., Xuan Nam T., Physical network coding for bidirectional relay MIMO-SDM system, Proceedings of the Advanced Technologies for Communications (ATC), pp. 141-146, (2013)

[8]

Chang R.Y., Lin S.J., Chung W.H., Joint-denoiseand-forward protocol for multi-way relay networks, Proceedings of the Signal and Information Processing Association Annual Summit and Conference (APSIPA), pp. 1-4, (2013)

[9]

Chen M., Yener A., Multiuser two-way relaying: detection and interference management strategies, IEEE Transactions on Wireless Communications, 8, 8, pp. 4296-4305, (2009)

[10]

Mengali U., D'Andrea A.N., Synchronization Techniques for Digital Receivers, pp. 353-515, (1997)

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