Abstract：In order to further improve the BOC (1,1) and its derived types modulated signal’s code discrimination quality and tracking ability of the satellite navigation receiver, especially in high dynamic. This paper proposes a method to determine the BOC (1,1) modulated signal code phase by partial correlation function interpolation. This method is based on the structure of correlators array, the approximate range of the correlation peak is determined by the correlators’ output. The generalized extended approximation method is used to estimate the code phase, and a virtual correlator is created in order to process the generalized extended approximation when the extended range does not exist. In this paper, the influence of the one side correlators’ number N on the linear pull-in region is analyzed in detail. On this basis, the computer simulation experiment for the proposed method is given. Theoretical and simulation results show: the proposed method can be used to enlarge the linear pull-in region of phase discrimination function without adding too much hardware resources, furthermore, it can improve the BOC modulated signals’ tracking accuracy for the receiver.
李文刚, 王屹伟. 基于局部相关函数插值的二进制偏移载波调制信号码相位估计与鉴相方法[J]. 电子与信息学报, 2018, 40(3): 557-564.
LI Wengang, WANG Yiwei. Code Phase Estimate and Discrimination Method for BOC Modulated Signal Based on Partial Correlation Function Interpolation. JEIT, 2018, 40(3): 557-564.
YANG Yikang, Peng Peng, Yi Guokai, et al. A novel pseudo- code spread spectrum modulation scheme of frequency chirp binary offset carrier and its characteristics[J]. Journal of Electronics & Information Technology, 2015, 37(3): 637-642. doi: 10.11999/JEIT140824.
[2]
ZITOUNI S, ROUABAH K, CHIKOUCHE D, et al. General analytical models characterizing MBOC modulated signal[J]. Aerospace Science and Technology, 2016, 50: 112-126. doi: 10.1016/j.ast.2015.12.027.
[3]
BETZ J W. Engineering Satellite-Based Navigation and Timing: Global Navigation Satellite Systems, Signals, and Receivers[M]. New Jersey USA: John Wiley & Sons, Inc., Hoboken, 2015: 405-427.
[4]
JULIEN O, MACABIAU C, CANNON M E, et al. ASPeCT: Unambiguous sine-BOC(n,n) acquisition/tracking technique for navigation applications[J]. IEEE Transactions on Aerospace and Electronic Systems, 2007, 43(1): 150-162. doi: 10.1109/TAES.2007.357123.
[5]
NUNES F D, SOUSA F M G, and LEITAO J M N. Gating functions for multipath mitigation in GNSS BOC signals[J]. IEEE Transactions on Aerospace and Electronic Systems, 2007, 43(3): 951-964. doi: 10.1109/TAES.2007.4383585.
[6]
HODGART M S and BLUNT P D. Dual estimate receiver of binary offset carrier modulated signals for global navigation satellite systems[J]. Electronics Letters, 2007, 43(16): 877-878. doi: 10.1049/el:20071101.
QU Bo, WEI Jiaolong, YAN Tao, et al. Unambiguous tracking method for CBOC modulated signal based on dual loop estimate[J]. Journal of Huazhong University of Science and Technology(Natural Science Edition), 2014, 42(8): 58-62. doi: 10.13245/j.hust.140812.
[8]
LIU Zhe, HUANG Yangbo, TANG Xiaomei, et al. Unambiguous S-curve shaping for multipath mitigation for BOC(1,1) modulated signals in GNSS[J]. IEICE Transactions on Communications, 2015, E98-B(9): 1924-1930. doi: 10.1109/WCSP.2015.7341163.
[9]
LIU Zhe, PANG Jing, LIU Yingxiang, et al. Double strobe technique for unambiguous tracking of TMBOC modulated signal in GPS[J]. IEEE Signal Processing Letters, 2015, 22(12): 2204-2208. doi: 10.1109/LSP.2015.2470240.
[10]
XU Chengbo, LIU Zhe, TANG Xiaomei, et al. A design method of code correlation reference waveform in GNSS based on least-Squares fitting[J]. Sensors, 2016, 16(8): 1194. doi: 10.3390/s16081194.
[11]
RONALD L F. Unambiguous tracker for GPS binary offset carrier signals[C]. Proceedings of the Institute of Navigation National Technical Meeting: California USA, 2003: 1-5.
REN Jiawei, CHEN Huihua, JIA Weimin, et al. Optimum design of code discriminator for GNSS based on multi- correlator structure[J]. Systems Engineering and Electronics, 2013, 35(6): 1297-1302. doi: 10.3969/j.issn.1001-506X.2013. 06.28.
ZHANG Jie, MA Guanyi, LI Jinghua, et al. Generalized extended approximation GNSS code discriminator algorithm with maximum constraint[J]. Systems Engineering and Electronics, 2017, 39(4): 714-720. doi: 10.3969/j.issn.1001- 506X.2017.04.04.
[15]
SOUSA F M G and NUNES F D. New expressions for the autocorrelation function of BOC GNSS signals[J]. Navigation, 2013, 60(1): 1-9. doi: 10.1002/navi.30.
[16]
GOMEZ-CASCO D, GARCIA-MOLINA J A, GUSI-AMIGO A, et al. Mitigation of false locks in the acquisition of high- order BOC signals in HS-GNSS receivers[C]. International Conference on Localization and GNSS: Gothenburg, Sweden, 2016: 1-6. doi: 10.1109/ICL-GNSS.2016.7533691.
ZHANG Tianqi, JIANG Xiaolei, ZHAO Juntao, et al. Unambiguous general acquisition for binary offset carrier and its derivative signals[J]. Journal of Electronics & Information Technology, 2017, 39(2): 451-458. doi: 10.11999/JEIT160351.
CHEN Changchuan, ZHOU Yang, and ZHANG Tianqi. Blind estimation of the combination code sequence and information sequence for TDDM-BOC signal[J]. Journal of Electronics & Information Technology, 2016, 38(11): 2760-2766. doi: 10.11999/JEIT160042.
