基于互相关移位相乘BOC (m,n)无模糊捕获算法

李明; 胡辉; 郭萌; 禹飞; 谢虹群

doi:10.7527/S1000-6893.2021.25897

航空学报 >

2022 , Vol. 43 >Issue 8: 325897 - 325897

DOI: https://doi.org/10.7527/S1000-6893.2021.25897

电子电气工程与控制

基于互相关移位相乘BOC (m,n)无模糊捕获算法

李明 ,
胡辉 ,
郭萌 ,
禹飞 ,
谢虹群

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华东交通大学信息工程学院, 南昌 330013

收稿日期: 2021-06-01

修回日期: 2021-08-18

网络出版日期: 2021-08-17

基金资助

国家自然科学基金(61761019)

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Unambiguous acquisition algorithm based on cross-correlation function shift multiplication for BOC (m,n) signals

LI Ming ,
HU Hui ,
GUO Meng ,
YU Fei ,
XIE Hongqun

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College of Information Engineering, East China Jiaotong University, Nanchang 330013, China

Received date: 2021-06-01

Revised date: 2021-08-18

Online published: 2021-08-17

Supported by

National Natural Science Foundation of China (61761019)

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摘要

为了解决二进制偏移载波(BOC)调制信号带来的多峰性导致的捕获模糊度问题,提出了一种基于BOC/PRN互相关函数分离重构的移位相乘无模糊度捕获算法。根据BOC信号和伪随机码互相关函数的特性,通过将子相关函数进行一定时延,令关于原点对称的子相关函数相乘,再将相乘后的结果相加,达到消除旁峰的效果,同时为了进一步提高捕获性能,基于该算法提出了一种快速算法。分析比对了提出的两种算法的运算复杂度和仿真实验结果,快速算法在保留窄相关峰特性优点的同时,完全消除了旁峰的存在,且适用于任意调制阶数的BOC信号。移位相乘算法相较于传统的BOC无模糊度算法,检测概率优于ASPeCT法约3.5 dBHz,但运算量较大,且随调制阶数的增大而增大;快速算法检测概率优于ASPeCT法约3 dBHz,运算量减少了40%。

本文引用格式

李明 , 胡辉 , 郭萌 , 禹飞 , 谢虹群 . 基于互相关移位相乘BOC (m,n)无模糊捕获算法[J]. 航空学报, 2022 , 43(8) : 325897 -325897 . DOI: 10.7527/S1000-6893.2021.25897

Abstract

To solve the problem of acquisition ambiguity caused by the multiple peaks of Binary Offset Carrier (BOC) modulation signals, a shift multiplication unambiguous acquisition algorithm is proposed based on separation and reconstruction of the BOC/PRN(Pseudo Random Noise) cross-correlation function. According to the characteristics of the cross-correlation function between the BOC signal and the pseudo-random code, the sub-correlation functions with respect to the symmetry of the origin with a certain delay are multiplied and the multiplied results are added to eliminate the effect of side peaks. To further improve the acquisition performance, a fast algorithm is proposed based on this algorithm. Comparison of the computing complexity and simulation results of the two algorithms shows that the fast algorithm, while maintaining the advantages of narrow correlation peak characteristics, can completely eliminate the existence of the peak, and can be applied to any modulation order of BOC signal. Compared with the traditional BOC unambiguous algorithm, the detection probability of the shift-multiplication algorithm is about 3.5 dBHz better than that of the ASPeCT(Auto correlation Side-Peak Cancellation Technique) method, but the computation of the algorithm is large and increases with the increase of the modulation order. The detection probability of the fast algorithm is about 3 dBHz better than that of the ASPeCT method; and the computation of the algorithm is reduced by 40%.

Key words： BOC signal acquisition; cross-correlation function; decomposition and reconstruction; unambiguous; side-peak cancellation

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