지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2022.10
- 수록면
- 940 - 949 (10page)
- DOI
- 10.5302/J.ICROS.2022.22.0149
이용수
초록· 키워드
오류제보하기
In this paper, we propose a time multiplexed binary coded symbol (TMBCS) modulation scheme based on Gray and inverse Gray (GIG) codes for the next generation global navigation satellite system (GNSS). A representative binary coded symbol (BCS) is a binary offset carrier (BOC). Compared to the existing binary phase shift keying (BPSK) modulation, which is a representative GNSS modulation scheme, BOC modulation has a high degree of freedom in terms of frequency band shape design and is less affected by multipaths because the correlation function is sharper at the correct code phase. However, since several sub-peaks occur in the correlation function of the BOC-modulated pseudo-noise signal, false locks can easily occur during code tracking. This disadvantage is called the ambiguity of the BOC modulated signal. Time multiplexed binary Walsh spreading (TMBWS) modulation, which is a TMBCS scheme that uses a Walsh code, is one method for reducing ambiguity and is a perfectly orthogonal code with a very good correlation among BCSs. However, Walsh codes can only be generated with a power of two length. In this paper, we propose a novel TMBCS modulation scheme using quasi-orthogonal GIG codes that can be generated with lengths that are multiples of 2. The proposed scheme maintains the same bandwidth and spectral separation coefficient compared to TMBWS when a symbol of length 8 is used. In addition, the proposed scheme has a higher degree of freedom in terms of band shape design compared to TMBWS modulation, because the length can be designed in multiples of 2 (such as 6, 10, or 12) and has high multipath immunity with unambiguity.
목차
Abstract
I. 서론
II. 신호 모형과 TMBWS 변조
III. 새로운 TMBCS 변조: TMGIG 변조
IV. 성능 분석
V. 결론
REFERENCES
참고문헌 (18)
참고문헌 신청
J. W. Betz, Engineering Satellite-Based Navigation and Timing: Global Navigation Satellite Systems, Signals, and Receivers, IEEE Press & John Wiley & Sons, Inc., Hoboken, NJ, 2016.
K. Ryu, G. Park, B. Lee, Y. J. Lee, and S. Sung, “Real-time performance improvement of GNSS navigation in urban cannon via 3D high-speed computation engine and 3D map information,” Journal of Institute of Control, Robotics and Systems (in Korean), vol. 27, no. 11, pp. 824-829, Nov. 2021.
J. W. Betz, “Binary offset carrier modulations for radionavigation,” Navigation: Journal of The Institute of Navigation, vol. 48, no. 4, pp. 227-246, Winter 2001.
O. Julien, C. Macabiau, J.-L. Issler, and L. Ries, “1-bit processing of composite BOC (CBOC) signals and extension to time-multiplexed BOC (TMBOC) signals,” Proceedings of the 2007 National Technical Meeting of The Institute of Navigation, pp. 227-239, San Diego, CA, Jan. 2007.
E. Simona and M. Renfors, “Correlation properties of multiplexed binary offset carrier modulation,” Proceedings of the European Wireless 2007 (EW 2007), pp. 1-7, Paris, France, Apr. 2007.
K. Ryu, G. Park, B. Lee, Y. J. Lee, and S. Sung, “Real-time performance improvement of GNSS navigation in urban cannon via 3D high-speed computation engine and 3D map information,” Journal of Institute of Control, Robotics and Systems (in Korean), vol. 27, no. 11, pp. 824-829, Nov. 2021.
J. W. Betz, “Binary offset carrier modulations for radionavigation,” Navigation: Journal of The Institute of Navigation, vol. 48, no. 4, pp. 227-246, Winter 2001.
O. Julien, C. Macabiau, J.-L. Issler, and L. Ries, “1-bit processing of composite BOC (CBOC) signals and extension to time-multiplexed BOC (TMBOC) signals,” Proceedings of the 2007 National Technical Meeting of The Institute of Navigation, pp. 227-239, San Diego, CA, Jan. 2007.
E. Simona and M. Renfors, “Correlation properties of multiplexed binary offset carrier modulation,” Proceedings of the European Wireless 2007 (EW 2007), pp. 1-7, Paris, France, Apr. 2007.
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