Title:
FREQUENCY OFFSET ESTIMATION METHOD FOR AVERAGE CONSISTENCY CLOCK SYNCHRONIZATION
Document Type and Number:
WIPO Patent Application WO/2021/056761
Kind Code:
A1
Abstract:
The present invention relates to the technical field of wireless sensor networks, and relates to a frequency offset estimation method for average consistency clock synchronization. According to the method, solving of maximum likelihood estimation is converted into a linear optimization problem in combination with distributed one-way broadcast characteristics, and a relative frequency offset estimation value is obtained by adopting an iterative method. By applying the estimation value to inter-node logic clock parameter compensation, the effect of keeping logic clocks of network nodes consistent can be achieved. According to the present invention, the distribution characteristics of the communication time delay are fully considered, accurate relative frequency offset estimation can be implemented, so that the synchronization precision of average consistency clock synchronization is effectively improved, the maximum likelihood estimation solution is performed by adopting the iterative method, an estimation algorithm is simplified, and storage overhead is reduced.
Inventors:
WANG HENG (CN)
CHEN LIUQING (CN)
GONG PENGFEI (CN)
CHEN LIUQING (CN)
GONG PENGFEI (CN)
Application Number:
PCT/CN2019/118864
Publication Date:
April 01, 2021
Filing Date:
November 15, 2019
Export Citation:
Assignee:
UNIV CHONGQING POSTS & TELECOM (CN)
International Classes:
H04W56/00; H04J3/06
Foreign References:
| CN104519563A | 2015-04-15 | |||
| CN104968043A | 2015-10-07 | |||
| US20090080576A1 | 2009-03-26 |
Other References:
EU-SUK SHIM ; SANG-TAE KIM ; HYOUNG-KYU SONG ; YOUNG-HWAN YOU: "OFDM Carrier Frequency Offset Estimation Methods With Improved Performance", IEEE TRANSACTIONS ON BROADCASTING., IEEE SERVICE CENTER, PISCATAWAY, NJ., US, vol. 53, no. 2, 1 June 2007 (2007-06-01), US, pages 567 - 573, XP011184913, ISSN: 0018-9316, DOI: 10.1109/TBC.2007.894793
MARCO ROTOLONI ; STEFANO TOMASIN ; LORENZO VANGELISTA: "Maximum Likelihood Estimation of Time and Carrier Frequency Offset for DVB-T2", IEEE TRANSACTIONS ON BROADCASTING., IEEE SERVICE CENTER, PISCATAWAY, NJ., US, vol. 58, no. 1, 1 March 2012 (2012-03-01), US, pages 77 - 86, XP011420586, ISSN: 0018-9316, DOI: 10.1109/TBC.2011.2173367
　WANG DONG, LUAN YINGZI, LIU YUANYUAN: "An Improved Synchronization Iterative ML Algorithm in OFDM System", ELECTRONIC SCIENCE AND TECHNOLOGY, vol. 21, no. 10, 1 January 2008 (2008-01-01), pages 31 - 34, XP055794437, DOI: 10.16180/j.cnki.issn1007-7820.2008.10.008
SHA NAN, GAO YUAN-YUAN, YI XIAO-XIN, LONG YAN-SHAN: "Physical-layer Network Coding Based on CPFSK Modulation Detection and Performance Analysis", JOURNAL OF ELECTRONICS & INFORMATION TECHNOLOGY, KEXUE CHUBANSHE, vol. 36, no. 6, 1 June 2014 (2014-06-01), Kexue Chubanshe, pages 1454 - 1459, XP055794440, ISSN: 1009-5896, DOI: 10.3724/SP.J.1146.2013.01201
MARCO ROTOLONI ; STEFANO TOMASIN ; LORENZO VANGELISTA: "Maximum Likelihood Estimation of Time and Carrier Frequency Offset for DVB-T2", IEEE TRANSACTIONS ON BROADCASTING., IEEE SERVICE CENTER, PISCATAWAY, NJ., US, vol. 58, no. 1, 1 March 2012 (2012-03-01), US, pages 77 - 86, XP011420586, ISSN: 0018-9316, DOI: 10.1109/TBC.2011.2173367
　WANG DONG, LUAN YINGZI, LIU YUANYUAN: "An Improved Synchronization Iterative ML Algorithm in OFDM System", ELECTRONIC SCIENCE AND TECHNOLOGY, vol. 21, no. 10, 1 January 2008 (2008-01-01), pages 31 - 34, XP055794437, DOI: 10.16180/j.cnki.issn1007-7820.2008.10.008
SHA NAN, GAO YUAN-YUAN, YI XIAO-XIN, LONG YAN-SHAN: "Physical-layer Network Coding Based on CPFSK Modulation Detection and Performance Analysis", JOURNAL OF ELECTRONICS & INFORMATION TECHNOLOGY, KEXUE CHUBANSHE, vol. 36, no. 6, 1 June 2014 (2014-06-01), Kexue Chubanshe, pages 1454 - 1459, XP055794440, ISSN: 1009-5896, DOI: 10.3724/SP.J.1146.2013.01201
Attorney, Agent or Firm:
TIDYTEND INTELLECTUAL PROPERTY LAW FIRM (CN)
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