Hostname: page-component-78c5997874-lj6df Total loading time: 0 Render date: 2024-11-13T03:54:39.475Z Has data issue: false hasContentIssue false
  • English
  • Français

A High-Sensitivity Acquisition Algorithm for BeiDou Signals with NH Code

Published online by Cambridge University Press:  02 May 2019

Rongbing Li ,
Zhifeng Han Open the ORCID record for Zhifeng Han [Opens in a new window] ,
Jianye Liu  and
Yi Wang
Rongbing Li
Affiliation:
(College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China)
Zhifeng Han*
Affiliation:
(College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China) (College of Transportation, Shandong University of Science and Technology, Qingdao 266590, China)
Jianye Liu
Affiliation:
(College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China)
Yi Wang
Affiliation:
(College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China)
*
(E-mail: hanzhifeng@nuaa.edu.cn)
Get access Rights & Permissions [Opens in a new window]

Abstract

BeiDou signals are modulated with a Neumann-Hofman (NH) code of 1 kbps. The frequent bit transitions lead to a sensitivity attenuation of classic acquisition algorithms. In order to increase acquisition sensitivity for weak BeiDou signals, a novel algorithm based on modified zero-padding and differential correlation is proposed. First, a zero-padding method is used to weaken the effect of NH code. Second, the differential coherent delay time is modified to 20 ms to remove the influence of data bit transitions. The integration time is extended to 10 ms to increase acquisition sensitivity. Finally, Monte Carlo simulations and real data tests are conducted to analyse the performance of the proposed algorithm. Simulated results show that the proposed acquisition algorithm outperforms traditional algorithms under a Carrier-to-Noise ratio (C/N0s) of 20~38 dB-Hz. The sensitivity of the proposed algorithm is about 10dB higher than traditional 6 ms repeated search algorithms. Real data test results show that the proposed algorithm outperforms the traditional method with weak signals. This algorithm can remove the effect of NH code and effectively increase the acquisition sensitivity. The proposed algorithm is suitable for acquisition of weak BeiDou signals.

Keywords

AcquisitionWeak signalNH codeBeiDou SystemDifferential coherent algorithm
Type
Research Article
Information
The Journal of Navigation , Volume 72 , Issue 6 , November 2019 , pp. 1550 - 1564
Copyright
Copyright © The Royal Institute of Navigation 2019 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Bhuiyan, M. Z. H., Söderholm, S., Thombre, S., Ruotsalainen, L. and Kuusniemi, H. (2014). Overcoming the challenges of BeiDou receiver implementation. Sensors, 14(11), 22082–22098.Google Scholar
Borio, D., O'Driscoll, C. and Lachapelle, G. (2009). Coherent, noncoherent, and differentially coherent combining techniques for acquisition of new composite GNSS signals. IEEE Transactions on Aerospace and Electronic Systems, 45, 1227–1239.Google Scholar
Borio, D. (2011). M-sequence and secondary code constraints for GNSS signal acquisition. IEEE Transactions on Aerospace & Electronic Systems, 47(2), 928–945.Google Scholar
China Satellite Navigation Office. (2016). BeiDou Navigation Satellite System Signal in Space Interface Control Document Open Service Signal (Version 2.1). Available online: http://en.beidou.gov.cn/index.html.Google Scholar
European GNSS (Galileo) Open Service Signal. (2015). Space Interface Control Document, OS SIS ICD, Iss.1.2, European Union.Google Scholar
Han, Z., Liu, J., Li, R., Zeng, Q. and Wang, Y. (2017). A Modified Differential Coherent Bit Synchronization Algorithm for BeiDou Weak Signals with Large Frequency Deviation. Sensors, 17(7), 1568–1585.Google Scholar
Hegarty, C., Tran, M. and Van Dierendonck, A.J. (2003). Acquisition Algorithms for the GPS L5 Signal. ION GNSS 2003, Institute of Navigation, Portland, OR, USA, September 9–12, 165–177.Google Scholar
Hegarty, C. (2006). Optimal and Near-Optimal Detectors for Acquisition of the GPS L5 Signal. Proceedings of the U.S. Institute of Navigation NTM, Jan, 717–725.Google Scholar
Kaplan, E and Hegarty, C. (2005). Understanding GPS: Principles and Application 2nd edn. Artech House Inc, BostonGoogle Scholar
Musumeci, L., Dovis, F., Silva, J. S., Silva, P. F. D. and Lopes, H. D. (2016). Design of a high sensitivity gnss receiver for lunar missions. Advances in Space Research, 57(11), 2285–2313.Google Scholar
Teunissen, P. and Montenbruck, O. Eds. (2017). Springer Handbook of Global Navigation Satellite Systems. Springer.Google Scholar
Tsui, J. B. Y. (2005). Fundamentals of Global Positioning System Receivers: A Software Approach. 2nd edn. Wiley, New York.Google Scholar
Van Dierendonck, A. J. (2000). The new l5 civil GPS signal. Gps World.11(9):64.Google Scholar
Wang, X., Ji, X. and Feng, S. (2014) A scheme for weak GPS signal acquisition aided by SINS information. GPS Solutions, 18(2), 243–252.Google Scholar
Wang, X., Ji, X., Feng, S. and Calmettes, V. (2015). A high-sensitivity GPS receiver carrier-tracking loop design for high-dynamic applications. GPS Solutions 19(2), 225–236.Google Scholar
Xie, F., Sun, R., Kang, G., Qian, W., Zhao, J. and Zhang, L. (2017). A jamming tolerant BeiDou combined B1/B2 vector tracking algorithm for ultra-tightly coupled GNSS/INS systems. Aerospace Science and Technology, 70, 265–276.Google Scholar
Xie, P. and Petovello, M.G. (2015). Improved Correlator Peak Selection for GNSS Receivers in Urban Canyons. The Journal of Navigation, 68(05), 869–886.Google Scholar
Yang, C. (2003). FFT-Based Fast Direct Acquisition of New Civil GPS Signals. U.S. PTO Disclosure Document No. 539, 039, September 2003.Google Scholar
Yang, C., Hegarty, C. and Tran, M. (2004) Acquisition of the GPS L5 signal using coherent combining of I5 and Q5. ION GNSS 2004, Institute of Navigation, Long Beach, CA, USA, September 21–24, 2184–2195.Google Scholar
Yu, W., Zheng, B., Watson, R. and Lachapelle, G. (2007) Differential combining for acquiring weak GPS signals. Signal Processing, 87(5), 824–840.Google Scholar