多径信道下OFDM系统的采样频率偏移盲估计方法

doi:10.3969/j.issn.1001-2400.2014.04.016

Abstract

Abstract:

In order to improve the performance of sampling frequency offset(SFO) estimation for the Orthogonal Frequency Division Multiplexing(OFDM) system in practical non-cooperation communications, this paper proposes a new sampling frequency offset estimation for the OFDM system estimation algorithm in multipath fading channels and the non-cooperation communications system. The proposed algorithm first uses an improved cycle spectrum to make a coarse estimation of the relative point, and then estimates accurately the relative point through another improved cycle spectrum. Finally, the estimated values of sampling frequency offset are obtained by the rate of change of the phase of the cycle spectrum in the relative point after jumping phase change and least square fitting. Simulation results show that the proposed algorithm has not only higher estimation accuracy but also better performance over multipath channels.

Key words: sampling frequency offset, orthogonal frequency division multiplexing, blind estimation, cycle spectrum, multipath channels

LI Bingbing;SUN Jun;LIU Mingqian. Blind estimation algorithm of sampling frequency offset for the OFDM system over multipath channels[J].J4, 2014, 41(4): 87-93.

References

［1］ Laourine A, Stephenne A, Affes S. Blind Sampling Clock Offset Estimation in OFDM System Based on Second Order Statistics ［C］//Proceedings of the 40th Asilomar Conference on Signals, Systems and Computers. Piscataway: IEEE, 2006: 1782-1785.
［2］ Liu G, Li B B, Pang H L. Blind Sampling Clock Offset Estimation Algorithm for OFDM System［C］//Proceedings of the 2009 2nd International Congress on Image and Signal Processing. Piscataway: IEEE, 2009: 1-4.
［3］ Ai B, Shen Y, Zhong Z D, et al. Enhanced Sampling Clock Offset Correction Based on Time Domain Estimation Scheme［J］. IEEE Transactions on Consumer Electronics, 2011, 57(2): 696-704.
［4］王磊, 徐大专. Gardner算法在OFDM 采样率同步中的应用［J］. 电子与信息学报, 2011, 33(4): 864-868.
Wang Lei, Xu Dazhuan. The Application of Gardner algorithm to Sampling Rate Synchronization in OFDM Systems［J］. Journal of Electronics ＆ Information Technology, 2011, 33(4): 864-868.
［5］ Castillo-Sanchez E, Lopéz-Martinez F J, Martos-Naya E, et al. Joint time, Frequency and Sampling Clock Synchronization for OFDM-based Systems［C］//Wireless Communications and Networking Conference. New York: IEEE, 2009: 491776.
［6］胡登鹏, 张尔扬. 非数据辅助的OFDM系统采样频率同步算法［J］. 信号处理, 2010, 26(6): 956-960.
Hu Dengpeng, Zhang Eryang. Non-data-aided Sampling Frequency Synchronization Algorithm for OFDM Systems［J］. Signal Processing, 2010, 26(6): 956-960.
［7］胡登鹏. OFDM系统中的非数据辅助同步及PAPR抑制技术研究［D］. 湖南: 国防科学技术大学, 2010.
［8］ Zahedi-Ghasabeh A, Tarighat A, Daneshrad B. Sampling Clock Frequency Offset Compensation for Feature Detection in Spectrum Sensing［C］//IEEE International Conference on Communications. Piscataway: IEEE Press, 2010: 5501997.
［9］ Zahedi-Ghasabeh A, Tarighat A, Daneshrad B. Spectrum Sensing of OFDM Waveforms Using Embedded Pilots in the Presence of Impairments［J］. IEEE Transactions on Vehicular Technology, 2012, 61(3): 1208-1221.
［10］ Socheleau F X, Houcke S, Ciblat P, et al. Cognitive OFDM System Detection Using Pilot Tones Second and Third-order Cyclostationarity［J］. Signal Processing, 2011, 91(2): 252-268.

[1]	GAO Yang,XIANG Binglong,GONG Fengkui. SG-PTS method for PAPR reduction of multi-channel OFDM signals [J]. Journal of Xidian University, 2019, 46(5): 128-133.
[2]	GU Yabin;ZHANG Linrang;ZHOU Yu;ZHAO Yonghong. OFDM radar and communication sharing signal processing using the correlation function [J]. Journal of Xidian University, 2018, 45(4): 12-17+105.
[3]	YANG Ruonan;LOU Shuntian;ZHANG Weitao. Blind channel estimation for MIMO-OFDM systems via non-redundant block precoding [J]. Journal of Xidian University, 2018, 45(4): 29-33.
[4]	SHEN Zhiwei;LIU Jingmei;HAN Qingqing. Scheme for generation of a highly adaptive physical layer secret key [J]. Journal of Xidian University, 2018, 45(4): 86-91.
[5]	LI Shengyuan;ZHANG Xintian;TANG Shiyang. MIMO radar waveform design via OFDM-LFM for a high speed target [J]. Journal of Xidian University, 2018, 45(3): 7-12.
[6]	GE Lijun;ZHAO Lan;LI Yue;GUO Hui;LI Mingyang;ZHAO Ruijun. Quantization noise shaping of the sigma-delta modulator based on the all phase FFT in OFDM systems [J]. Journal of Xidian University, 2017, 44(4): 80-85+117.
[7]	LIU Haitao;CONG Wan;YIN Zhisheng;LI Dongxia. Symbol error probability of an OFDM receiver with pulse blanking based on the peak value threshold [J]. Journal of Xidian University, 2017, 44(1): 125-129+164.
[8]	LIU Mingqian;CHEN Jian;LI Bingbing;GUO Xiaoling. Blind equalization method for OFDM systems in non-cooperative communication [J]. Journal of Xidian University, 2016, 43(3): 1-5.
[9]	LIU Mingqian;LI Bingbing;HUANG Shaodong. Blind carrier frequency offset estimation for OFDM in non-cooperative communication [J]. J4, 2016, 43(1): 24-29.
[10]	JI Jinwei;REN Guangliang;ZHANG Huining. Semi-blind SLM scheme for reducing the PAPR of MIMO-OFDM systems [J]. J4, 2015, 42(5): 13-19+146.
[11]	WEN Honghang;GE Jianhua;XU Tangwen. Low complexity method for PAPR reduction of OFDM signals [J]. J4, 2015, 42(5): 188-193.
[12]	YANG Xiaowei;GAN Lu. Fast blind estimation algorithm for Hamming codes parameters [J]. J4, 2013, 40(5): 60-65.
[13]	WANG Han;ZHU Leiji;SHI Yusong;XING Tao;WANG Yingguan. Novel time synchronization algorithm using the cyclic prefix for OFDM systems [J]. J4, 2013, 40(1): 141-147.
[14]	ZHAN Jinlong;LU Jianjun;LU Guangyue. Quasi orthogonal group SFTBC transmit scheme with linear constellation precoding [J]. J4, 2011, 38(6): 134-139.
[15]	CHEN Dong-hua;QIU Hong-bing. Novel estimation and equalization of time-variant channels for OFDM system [J]. J4, 2010, 37(6): 999-1004.

Blind estimation algorithm of sampling frequency offset for the OFDM system over multipath channels

PDF (PC)

Like

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Metrics

Comments

Recommended 10