摘要
正交复用二进制偏移载波(QMBOC)信号是北斗系统采用的相对复杂的新型调制信号。基于二进制偏移载波(BOC)畸变模型,分析了QMBOC信号的数字和模拟畸变特性,包括时延和衰减因子两个参数,分析了分量信号与合路信号之间的畸变特性内在关系,以及不同畸变参数下,对信号相关功率的影响。仿真分析表明:信号数字及模拟畸变发生在合路之前与发生在合路之后明显不同,得到了支路与合路波形畸变均值与相关系数的函数关系;对相关功率的实验中,当Q支路数字、模拟畸变较I支路更大时,相关功率显著降低。揭示了QMBOC合路信号与分量信号之间畸变参数的影响关系,为北斗QMBOC信号的异常分析与畸变检测提供了充分的理论工作,有效的支撑了QMBOC的信号质量监测(SQM)工作。
Quadrature multiplexed binary offset carrier(QMBOC)signal is a relatively complicated novel modulated signal adopted by the BeiDou system.Digital and analog distortion characteristics including time delay,attenuation factor of the QMBOC signal are analyzed based on the binary offset carrier(BOC)distortion model.The internal relationship of distortion between component signals and the combined signal.The effects of different distortion parameters on correlated power of the signal are analyzed.The simulation analysis demonstrates a clear distinction in the digital and analog distortion of the signal before and after the combination of circuit.functional relationship of mean waveform distortion and correlation coefficient between the branch and the combined circuit.In the correlated power experiments,when the level of digital and analog distortion in the Q branch exceeds that in the I branch,the correlated powers are significantly decreased.This study reveals the influence relationship of distortion parameters between the QMBOC combined signal and the component signal.This finding offers valuable theoretical support for anomaly analysis of the BeiDou QMBOC signal,effectively supports signal quality monitoring(SQM)work of QMBOC.
作者
高欣
饶永南
郑晓刚
郭瑶
GAO Xin;RAO Yongnan;ZHENG Xiaogang;GUO Yao(School of Electrical and Electronic Engineering,Wuhan Polytechnic University,Wuhan 430000,China;Key Laboratory of Time Reference and Applications,CAS,National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《传感器与微系统》
北大核心
2026年第2期138-144,共7页
Transducer and Microsystem Technologies
基金
中国科学院“西部之光”人才培养计划“西部青年学者”资助项目(XAB2022YN15)。
