Research on ELoran Demodulation Algorithm Based on Multiclass Support Vector Machine

被引:2
|
作者
Liu, Shiyao [1 ,2 ]
Yan, Baorong [1 ,2 ]
Guo, Wei [1 ,2 ]
Hua, Yu [1 ,2 ]
Zhang, Shougang [1 ,3 ,4 ]
Lu, Jun [5 ]
Xu, Lu [5 ]
Yang, Dong [6 ]
机构
[1] Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Peoples R China
[2] Chinese Acad Sci, Key Lab Precise Positioning & Timing Technol, Xian 710600, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100039, Peoples R China
[4] Chinese Acad Sci, Key Lab Time & Frequency Stand, Xian 710600, Peoples R China
[5] Chengdu Univ Informat Technol, Sch Software Engn, Chengdu 610225, Peoples R China
[6] Sichuan Meteorol Serv Ctr, Chengdu 610072, Peoples R China
关键词
eLoran; demodulation; multiclass support vector machine; machine learning; RANDOM FOREST CLASSIFIER; LORAN DATA MODULATION;
D O I
10.3390/rs16173349
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Demodulation and decoding are pivotal for the eLoran system's timing and information transmission capabilities. This paper proposes a novel demodulation algorithm leveraging a multiclass support vector machine (MSVM) for pulse position modulation (PPM) of eLoran signals. Firstly, the existing demodulation method based on envelope phase detection (EPD) technology is reviewed, highlighting its limitations. Secondly, a detailed exposition of the MSVM algorithm is presented, demonstrating its theoretical foundations and comparative advantages over the traditional method and several other methods proposed in this study. Subsequently, through comprehensive experiments, the algorithm parameters are optimized, and the parallel comparison of different demodulation methods is carried out in various complex environments. The test results show that the MSVM algorithm is significantly superior to traditional methods and other kinds of machine learning algorithms in demodulation accuracy and stability, particularly in high-noise and -interference scenarios. This innovative algorithm not only broadens the design approach for eLoran receivers but also fully meets the high-precision timing service requirements of the eLoran system.
引用
收藏
页数:20
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