适用于BOC任意调制阶数的无模糊捕获算法  

Unambiguous acquisition algorithm for BOC arbitrary modulation order

作　　者：井儒东 王剑 刘瑞华 戚涵天 JING Rudong;WANG Jian;LIU Ruihua;QI Hantian(Sino-European Institute of Aviation Engineering, Civil Aviation University of China, Tianjin 300300, China;Civil Aviation Air Traffic Management Research Institute, Civil Aviation University of China, Tianjin 300300, China;College of Information Engineering and Automation, Civil Aviation University of China, Tianjin 300300, China)

机构地区：[1]中国民航大学中欧航空工程师学院,天津300300 [2]中国民航大学民航空管研究院,天津300300 [3]中国民航大学电子信息与自动化学院,天津300300

出　　处：《系统工程与电子技术》2019年第12期2710-2716,共7页Systems Engineering and Electronics

基　　金：国家重点研发计划地球观测与导航重点专项(2016YFB0502400)资助课题

摘　　要：通过研究二进制偏移载波(binary offset carrier,BOC)自相关函数的特点,提出了一种适用于BOC任意调制阶数的无模糊捕获算法。将BOC自相关函数进行翻转、截取、相叠加,构造出一种新的相关函数,与原自相关函数的绝对值相加后,可以完全消除副峰。理论分析和仿真实验结果表明,该算法对任意调制阶数的BOC信号均适用;通过对比新算法与其他算法在不同BOC调制阶数之间的检测性能,在相同载噪比下,新算法的检测概率更高;算法的复杂度低,并且不会随着调制阶数的升高而增大;捕获结果保持了较窄的主峰宽度;鉴相输出不会造成误锁现象,能够准确跟踪信号。By studying the characteristics of binary offset carrier (BOC) autocorrelation function, an unambiguous acquisition algorithm suitable for BOC arbitrary modulation order is proposed. The BOC autocorrelation function is flipped, intercepted, and superimposed to construct a new correlation function. After adding the absolute value of the original autocorrelation function, the side peak can be completely eliminated. Theoretical analysis and simulation results show that the proposed algorithm is applicable to BOC signals with arbitrary modulation orders. By comparing the detection performance between new algorithms and other algorithms in different BOC modulation orders, under the same carrier to noise ratio, the detection probability of the new algorithm is higher;the complexity of the algorithm is low, and does not increase with the increasing modulation order;the acquisition result maintains a narrow main peak width;the discriminator output does not cause a false lock phenomenon, and the signal can be accurately tracked.

关 键 词：二进制偏移载波 自相关函数 无模糊捕获 检测概率 

分 类 号：V249.32[航空宇航科学与技术—飞行器设计]