A Frequency-Domain Multipath Parameter Estimation and Mitigation Method for BOC-Modulated GNSS Signals
As multipath is one of the dominating error sources for high accuracy Global Navigation Satellite System (GNSS) applications, multipath mitigation approaches are employed to minimize this hazardous error in receivers. Binary offset carrier modulation (BOC), as a modernized signal structure, is adopt...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-02-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/18/3/721 |
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| author | Chao Sun Hongbo Zhao Wenquan Feng Songlin Du |
| author_facet | Chao Sun Hongbo Zhao Wenquan Feng Songlin Du |
| author_sort | Chao Sun |
| collection | DOAJ |
| description | As multipath is one of the dominating error sources for high accuracy Global Navigation Satellite System (GNSS) applications, multipath mitigation approaches are employed to minimize this hazardous error in receivers. Binary offset carrier modulation (BOC), as a modernized signal structure, is adopted to achieve significant enhancement. However, because of its multi-peak autocorrelation function, conventional multipath mitigation techniques for binary phase shift keying (BPSK) signal would not be optimal. Currently, non-parametric and parametric approaches have been studied specifically aiming at multipath mitigation for BOC signals. Non-parametric techniques, such as Code Correlation Reference Waveforms (CCRW), usually have good feasibility with simple structures, but suffer from low universal applicability for different BOC signals. Parametric approaches can thoroughly eliminate multipath error by estimating multipath parameters. The problems with this category are at the high computation complexity and vulnerability to the noise. To tackle the problem, we present a practical parametric multipath estimation method in the frequency domain for BOC signals. The received signal is transferred to the frequency domain to separate out the multipath channel transfer function for multipath parameter estimation. During this process, we take the operations of segmentation and averaging to reduce both noise effect and computational load. The performance of the proposed method is evaluated and compared with the previous work in three scenarios. Results indicate that the proposed averaging-Fast Fourier Transform (averaging-FFT) method achieves good robustness in severe multipath environments with lower computational load for both low-order and high-order BOC signals. |
| first_indexed | 2024-04-11T21:55:25Z |
| format | Article |
| id | doaj.art-f8271f31f44447c8bbf8d248943ef5ec |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T21:55:25Z |
| publishDate | 2018-02-01 |
| publisher | MDPI AG |
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| series | Sensors |
| spelling | doaj.art-f8271f31f44447c8bbf8d248943ef5ec2022-12-22T04:01:07ZengMDPI AGSensors1424-82202018-02-0118372110.3390/s18030721s18030721A Frequency-Domain Multipath Parameter Estimation and Mitigation Method for BOC-Modulated GNSS SignalsChao Sun0Hongbo Zhao1Wenquan Feng2Songlin Du3Electronic and information Engineering Department, Beihang University, 100191 Beijing, ChinaElectronic and information Engineering Department, Beihang University, 100191 Beijing, ChinaElectronic and information Engineering Department, Beihang University, 100191 Beijing, ChinaElectronic and information Engineering Department, Beihang University, 100191 Beijing, ChinaAs multipath is one of the dominating error sources for high accuracy Global Navigation Satellite System (GNSS) applications, multipath mitigation approaches are employed to minimize this hazardous error in receivers. Binary offset carrier modulation (BOC), as a modernized signal structure, is adopted to achieve significant enhancement. However, because of its multi-peak autocorrelation function, conventional multipath mitigation techniques for binary phase shift keying (BPSK) signal would not be optimal. Currently, non-parametric and parametric approaches have been studied specifically aiming at multipath mitigation for BOC signals. Non-parametric techniques, such as Code Correlation Reference Waveforms (CCRW), usually have good feasibility with simple structures, but suffer from low universal applicability for different BOC signals. Parametric approaches can thoroughly eliminate multipath error by estimating multipath parameters. The problems with this category are at the high computation complexity and vulnerability to the noise. To tackle the problem, we present a practical parametric multipath estimation method in the frequency domain for BOC signals. The received signal is transferred to the frequency domain to separate out the multipath channel transfer function for multipath parameter estimation. During this process, we take the operations of segmentation and averaging to reduce both noise effect and computational load. The performance of the proposed method is evaluated and compared with the previous work in three scenarios. Results indicate that the proposed averaging-Fast Fourier Transform (averaging-FFT) method achieves good robustness in severe multipath environments with lower computational load for both low-order and high-order BOC signals.http://www.mdpi.com/1424-8220/18/3/721frequency domain analysismultipath channelsparameter estimationsatellite navigation systemsbinary offset carrier (BOC) modulation |
| spellingShingle | Chao Sun Hongbo Zhao Wenquan Feng Songlin Du A Frequency-Domain Multipath Parameter Estimation and Mitigation Method for BOC-Modulated GNSS Signals Sensors frequency domain analysis multipath channels parameter estimation satellite navigation systems binary offset carrier (BOC) modulation |
| title | A Frequency-Domain Multipath Parameter Estimation and Mitigation Method for BOC-Modulated GNSS Signals |
| title_full | A Frequency-Domain Multipath Parameter Estimation and Mitigation Method for BOC-Modulated GNSS Signals |
| title_fullStr | A Frequency-Domain Multipath Parameter Estimation and Mitigation Method for BOC-Modulated GNSS Signals |
| title_full_unstemmed | A Frequency-Domain Multipath Parameter Estimation and Mitigation Method for BOC-Modulated GNSS Signals |
| title_short | A Frequency-Domain Multipath Parameter Estimation and Mitigation Method for BOC-Modulated GNSS Signals |
| title_sort | frequency domain multipath parameter estimation and mitigation method for boc modulated gnss signals |
| topic | frequency domain analysis multipath channels parameter estimation satellite navigation systems binary offset carrier (BOC) modulation |
| url | http://www.mdpi.com/1424-8220/18/3/721 |
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