Unambiguous synchronization scheme for GNSS BOC(n,n) signals

被引：0
作者：
机构：
[1] System Control and Info Processing Group Research Inst of Micro, Nano Science and Technology, Shanghai Jiaotong University, Shanghai
[2] Mechanical and Electronic Department School of Mechanical and Automotive Engineering, Hubei University of Arts and Science XiangYang
来源：
Chen, J. (Chenjp@sjtu.edu.cn) | 1600年 / Academy Publisher卷 / 09期
关键词：
Ambiguity; BOC modulation; Early-late-gate; Multipath; Probability detection; Tracking;
D O I：
10.4304/jnw.9.8.2224-2231
中图分类号：
O1 [数学];
学科分类号：
0701 ; 070101 ;
摘要：
Galileo and Modernized GPS have included in their signal structures a new signal modulation: the Binary Offset Carrier (BOC), which multiplies a spreading code with a square wave sub-carrier. It creates a split spectrum with two main lobes shifted from the center frequency by sub-carrier. This modulated signal induces better tracking in white noise and better inherent multipath mitigation compared to the spreading code alone. However, it also makes acquisition more challenging and tracking potentially ambiguous due to its multiple peak autocorrelation function. This paper, instead of trying to find a generic solution, focuses on a specific BOC signal: the BOC(n,n). A novel tracking technique dedicated to BOC(n,n) signals has been developed by using a synthesized local cross correlation function between received BOC signal and local PRN. It completely removes the side-peak threating. Simulation results show that the combined tracking loops can eliminate false lock points. It also reduces the standard tracking deviation error and slightly degrade its probability of detection compared with the standard tracking algorithm. © 2014 ACADEMY PUBLISHER.
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收藏
页码：2224 / 2231
页数：7
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