The autocorrelation function (ACF) of the Binary Offset Carrier modulation (BOC) signal for Global Navigation Satellite System (GNSS) has multiple peaks, ambiguity is easily generated during the synchronization of the baseband signal. Some methods have been proposed to remove the ambiguity, but the performance is not suitable for high-order BOC signals or does not maintain narrow correlation characteristics. This paper proposes a sub-function reconstruction synchronization algorithm to solve this problem, of which the key is to design a new local auxiliary code: the local Pseudo-Random Noise (PRN) code is divided into several new codes with different delays. The auxiliary code performs a coherent integration operation with the received signal. Then, a correlation function without any positive side peaks is obtained by multiplying the two correlation results to make the acquisition/tracking completely unambiguous. The paper gives a design scheme of navigation signal acquisition/tracking and deduces the theoretical analysis of detection performance. The phase discrimination function is provided. The performance of the method is analyzed from both theoretical and simulation aspects. Compared with the Binary phase shift keying-like (BPSK-LIKE) method, Subcarrier Phase Cancellation (SCPC) method and the Autocorrelation Side-Peak Cancellation Technique (ASPeCT) method, the proposed method has the best detection probability for the acquisition, which is 0.5 dB-Hz better than ASPeCT. For tracking, the proposed method performs best in terms of phase-detection curve, anti-multipath performance, and anti-noise performance. For high-order BOC signals, the SRSA technique successfully removes the false lock points, and there is only one multipath error envelope, and the code tracking error is almost the same as the ASPeCT method.

中文翻译：

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基于子相关函数的GNSS正弦BOC信号明确的采集/跟踪技术。

全球导航卫星系统（GNSS）的二进制偏移载波调制（BOC）信号的自相关函数（ACF）具有多个峰值，在基带信号同步期间很容易产生歧义。已经提出了一些消除歧义的方法，但是该性能不适用于高阶BOC信号或不能保持窄的相关特性。针对这一问题，本文提出了一种子函数重构同步算法，其关键是设计一种新的局部辅助码：将局部伪随机噪声（PRN）码分为具有不同时延的几种新码。辅助代码对接收到的信号执行相干积分操作。然后，通过将两个相关结果相乘，可以获得无任何正峰值的相关函数，从而使采集/跟踪完全明确。给出了导航信号采集/跟踪的设计方案，并对探测性能进行了理论分析。提供了相位鉴别功能。从理论和仿真两个方面分析了该方法的性能。与类二进制相移键控（BPSK-LIKE）方法，子载波相位抵消（SCPC）方法和自相关边峰抵消技术（ASPeCT）方法相比，该方法具有最佳的捕获检测概率，即比ASPeCT好0.5 dB-Hz。对于跟踪，该方法在相位检测曲线，抗多径性能，和抗噪性能。对于高阶BOC信号，SRSA技术成功去除了错误的锁定点，并且只有一个多径错误包络，并且代码跟踪错误与ASPeCT方法几乎相同。