非合作通信中MQAM的定时载波联合同步

doi:10.3969/j.issn.1001-2400.2018.01.004

西安电子科技大学学报

非合作通信中MQAM的定时载波联合同步

刘明骞1,2,3;陈钱2;吴芸3;李兵兵1

(1. 西安电子科技大学信息感知技术协同创新中心，陕西西安 710071；
2. 南京理工大学电子工程与光电技术学院，江苏南京 210094;
3. 徐州雷奥医疗设备有限公司，江苏徐州 221116)

收稿日期:2017-01-04 出版日期:2018-02-20 发布日期:2018-03-23
作者简介:刘明骞(1982-)，男，讲师，博士，E-mail: mqliu@mail.xidian.edu.cn
基金资助:
国家自然科学基金资助项目(61501348，61271299)；陕西省自然科学基础研究计划资助项目(2016JQ6039)；国家博士后科学基金资助项目(2017M611912)；高等学校学科创新引智计划资助项目(B08038)；江苏省博士后科研资助计划资助项目(1701059B)

Joint carrier synchronization and symbol timing for MQAM in non-cooperation communication systems

LIU Mingqian1,2,3;CHEN Qian2;WU Yun3;LI Bingbing1

(1. Collaborative Innovation Center of Information Sensing and Understanding, Xidian Univ., Xi'an 710071, China;
2. School of Electronic and Optical Engineering, Nanjing Univ. of Science and Technology, Nanjing 210094, China;
3. Xuzhou LEO Medical Equipments Co., Ltd., Xuzhou 221116, China)

Received:2017-01-04 Online:2018-02-20 Published:2018-03-23

摘要/Abstract

摘要：

针对非合作通信系统中多径信道下含有大符号率偏差的M进制正交振幅调制信号定时载波的同步问题，提出了一种基于改进加德纳算法的M进制正交振幅调制信号定时载波联合同步方法．该方法首先利用加德纳算法中频偏与算法输出值之间的关系，进行定时偏移估计与载波偏移粗估计；然后利用与其相差半个码元的定时误差检测输出值的绝对值差进行锁定；最后利用锁相环跟踪细微的频偏和相偏．仿真结果表明，在多径信道下，所提的定时偏移和载波偏移的联合估计方法具有良好的估计性能．

关键词: 同步, 符号定时, 频率偏移, 联合估计, 非合作通信

Abstract:

Aiming at the problem of symbol timing and carrier synchronization of (M-ary Quadrature Amplitude Modulation) MQAM signals with large symbol rate deviation in non-cooperative communication systems under multipath channels,a new method based on the improved Gardner algorithm for MQAM signal timing carrier joint synchronization is proposed. First, the method obtains timing offset estimation and carrier offset coarse estimation using the relationship between frequency offset and output value of the Gardner algorithm. Then, locking is performed with the difference of the absolute value between estimation and the output value of timing error detection which is half a symbol different from the estimation. Finally, the method uses the phase-locked loop to track the fine frequency offset and phase offset. Simulation result shows that the proposed joint estimation method of timing offset and carrier offset has a good estimation performance under the condition of multipath channels.

Key words: synchronization, symbol timing, carrier frequency offset, joint estimation, non-cooperation communication

刘明骞;陈钱;吴芸;李兵兵. 非合作通信中MQAM的定时载波联合同步[J]. 西安电子科技大学学报, 2018, 45(1): 17-22.

LIU Mingqian;CHEN Qian;WU Yun;LI Bingbing. Joint carrier synchronization and symbol timing for MQAM in non-cooperation communication systems[J]. Journal of Xidian University, 2018, 45(1): 17-22.

参考文献

［1］ LIN T C, PHOONG S M. A New Cyclic-prefix Based Algorithm for Blind CFO Estimation in OFDM Systems［J］. IEEE Transactions on Wireless Communications, 2016, 15(6): 3995-4008.
［2］ GAPPMAIR W, SCHLEMMER H, GINESI A. Joint Synchronization of Symbol Timing and Carrier Frequency Using the Extended Zero-crossing Property［C］//Proceedings of the 2016 8th Advanced Satellite Multimedia Systems Conference and 14th Signal Processing for Space Communications Workshop. Piscataway: IEEE, 2016: 7601537.
［3］ ZHANG X, HU J H. A New Time Delay Estimation Algorithm for Mixed OFDM Signal［C］//Proceedings of the 2015 International Conference on Wireless Communications and Signal Processing. Piscataway: IEEE, 2015: 7341146.
［4］吴涛, 戴旭初. 频率偏移和符号定时误差的盲估计方法［J］. 数据采集与处理, 2005, 20(3): 291-296.
WU Tao, DAI Xuchu. Blind Estimation of Frequency Offset and Symbol Timing Error［J］. Journal of Data Acquisition ＆ Processing, 2005, 20(3): 291-296.
［5］项立, 钟绍波. 单载波无线系统载频与定时偏移估计算法［J］. 计算机应用与软件, 2010, 27(5): 98-101.
XIANG Li, ZHONG Shaobo. Carrier Frequency and Timing Offsets Estimation Algorithm for Single Carrier Wireless Systems［J］. Computer Applications and Software, 2010, 27(5): 98-101.
［6］许小东. 非协作数字通信系统盲解调关键技术研究［D］. 合肥: 中国科学技术大学, 2007.
［7］ GAPPMAIR W, KOUDELKA O. Blind Symbol Timing Recovery in the Presence of IQ Mismatch and DC Offset［C］//Proceedings of the 2014 9th International Symposium on Communication Systems. Piscataway: IEEE, 2014: 1133-1138.
［8］ CHEN L M, LIANG Y, WAN G J. Symbol Timing and Carrier Frequency United Estimation for MPSK Signals［C］//Proceedings of the 2010 International Conference on Computer Application and System Modeling. Piscataway: IEEE, 2010: 5610-5613.
［9］史晓峰, 陈咏恩. DVB-C接收机中的时钟恢复电路设计［J］. 计算机工程与应用, 2006, 42(33): 78-80.
SHI Xiaofeng, CHEN Yongen. Design of Timing Recovery Loop for DVB-C Receiver［J］. Computer Engineering and Applications, 2006, 42(33): 78-80.
［10］ ZHANG S, XU L, YU J, et al. Dual-stage Cascaded Frequency Offset Estimation for Digital Coherent Receivers［J］. IEEE Photonics Technology Letters, 2010, 22(6): 401-403.
［11］ LOU H, LIN P F. A New Lock Detector for Gardner's Timing Recovery Method［J］. IEEE Transcations on Consumer Electronics, 2008, 54(2): 349-352.
［12］ ITU. Guidelines for Evaluation of Radio Transmission Technologies for IMT-2000: Recommendation ITU-R M.1225［S］. Geneva: ITU, 2010.

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非合作通信中MQAM的定时载波联合同步

Joint carrier synchronization and symbol timing for MQAM in non-cooperation communication systems

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