适用于任意阶数的BOC信号无模糊度捕获算法  

An Unambiguous Acquisition Algorithm for BOC Signal with Arbitrary Order

作　　者：舒翊 胡辉[1] 谢虹群 付矞飞 SHU Yi;HU Hui;XIE Hongqun;FU Yufei(School of Information and Software Engineering,East China Jiaotong University,Nanchang 330013,China;Innovation Academy for Microsatellites of Chinese Academy of Sciences,University of Chinese Academy of Sciences,Shanghai 201304,China;School of Advanced Technology,Xi’an Jiaotong-liverpool University,Suzhou 215123,China)

机构地区：[1]华东交通大学信息与软件工程学院,南昌330013 [2]中国科学院大学中国科学院微小卫星创新研究院,上海201304 [3]西交利物浦大学智能工程学院,江苏苏州215123

出　　处：《哈尔滨理工大学学报》2024年第3期90-98,共9页Journal of Harbin University of Science and Technology

基　　金：国家自然科学基金(61961020)。

摘　　要：针对二进制偏移载波(binary offset carrier, BOC)调制信号在捕获过程中的模糊度问题,提出了一种基于自相关函数加减互补的BOC(m,n)信号无模糊度捕获算法。根据副载波脉冲周期延拓的特性,通过拆分副载波,进而分离自相关函数,将关于码相位对称的第一个子相关函数和最后一个子相关函数做加减法运算后求差值,最后通过取模求和运算将旁峰完全消除。理论和仿真实验结果表明,该算法的适应性良好,适用于任意阶数的BOC调制信号,并且可以完全消除旁峰,保留窄相关峰特性。相比于SCPC、ASPeCT和BPSK-Like三种传统BOC信号无模糊度捕获算法,该算法的载噪比性能有约1.5~4.5 dBHz提高。Aiming at the ambiguity problem in the acquisition process of BOC(binary offset carrier)modulated signal,an unambiguous acquisition algorithm of BOC(m,n)signal based on auto-correlation addition and subtraction complementary is proposed.According to the characteristics of subcarrier pulse periodic extension,the purpose of separating the autocorrelation function is achieved by splitting the subcarriers.The first and last sub-correlation functions with respect to code phase symmetry are added and subtracted to calculate the difference,and finally the side peaks are completely eliminated by modulo summation operation.The theoretical and simulation results show that the algorithm has good adaptability,is suitable for BOC modulation signals with arbitrary order,and can completely eliminate side peaks while retaining the narrow correlation peak characteristics.Compared with SCPC,ASPeCT and BPSKLike three traditional BOC signal unambiguous acquisition algorithms,the proposed algorithm has an increase in SNR performance of about 1.5~4.5 dBHz.

关 键 词：二进制偏移载波调制 信号捕获 自相关函数 无模糊度 分离重构 

分 类 号：TN967.1[电子电信—信号与信息处理]