Two-Dimensional Compressed Correlator for Fast Acquisition of $\hbox{BOC}(m, n)$ Signals
Two-Dimensional Compressed Correlator for Fast Acquisition of $\hbox{BOC}(m, n)$ Signals
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DOI：
10.1109/tvt.2013.2293225
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发表时间：
2014-07
影响因子：
6.8
通讯作者：
Binhee Kim;S. Kong
中科院分区：
文献类型：
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作者：
Binhee Kim;S. Kong
在下一代全球导航卫星系统（GNSS）中使用长扩频码和二进制偏移载波（BOC）调制技术来改善定位性能并减少GNSS间干扰;然而，GNSS接收器的信号获取过程可能比传统全球定位系统（GPS）接收器花费更多时间并需要额外的硬件资源。提出了一种用于下一代GNSS信号快速捕获的BOC二维压缩相关器（TDCC）技术。在提出的BOC-TDCC中，相邻码相位假设和多普勒频率假设中的信号功率可以在第一阶段中由单个压缩相关器相干地组合和测试，并且在第二阶段中采用传统的基于压缩相关器的串行搜索技术来测试在第一阶段中组合的每个假设。BOC-TDCC的性能证明了大量的Monte Carlo模拟和测试与真实的数据。BOC-TDCC算法的平均捕获时间（MAT）远低于传统的搜索算法，是一种有效的下一代GNSS信号搜索算法。
The long spreading code and the binary offset carrier (BOC) modulation technique are used in the next-generation Global Navigation Satellite System (GNSS) to improve positioning performance and to reduce inter-GNSS interference; however, the signal acquisition process of a GNSS receiver can take more time and requires additional hardware resources than legacy Global Positioning System (GPS) receivers. This paper presents the BOC 2-D compressed correlator (TDCC) technique for the fast acquisition of the next-generation GNSS signals. In the proposed BOC-TDCC, signal power in neighboring code-phase hypotheses and Doppler frequency hypotheses can be coherently combined and tested by a single compressed correlator in the first stage, and the conventional correlator-based serial search technique is employed in the second stage to test each hypothesis combined in the first stage. The performance of the BOC-TDCC is demonstrated with numerous Monte Carlo simulations and tested with real data. The BOC-TDCC has much lower mean acquisition time (MAT) than other conventional search schemes, which demonstrates that the BOC-TDCC is an effective search scheme for next-generation GNSS signals.