【摘要】 卫星导航极易受到复杂环境下的干扰信号影响,捷联惯性导航系统(SINS)与卫星导航系统(GNSS)超紧组合导航技术可提高卫星接收机在信号干扰环境下的工作性能。在对比分析紧组合与超紧组合实现方案及北斗B1信号调制方式的基础上,提出基于相位控制的SINS与GNSS超紧组合环路信号解调方法,进一步分析SINS与GNSS超紧组合环路信号跟踪特性。对卫星信号受干扰环境及动态条件下的相位控制超紧组合与频率控制超紧组合方法的导航性能进行试验对比分析,结果表明相位控制超紧组合方法具有更稳定的定位性能,并可提高约7 dB的抗干扰能力。更多还原

【Abstract】 Satellite navigation is easily affected by interference signals in a complicated environment. The ultra-tightly coupled strapdown inertial navigation system( SINS)/global navigation satellite system( GNSS) navigation system can improve the anti-jamming performance of receiver. On the basis of analyzing the tight integration and ultra-tight integration implementation schemes and Bei Dou B1 signal modulation approach,a loop signal demodulation method of ultra-tight integration based on phase control is proposed.The tracking feature of ultra-tightly coupled SINS/GNSS loop signal is analyzed. The navigation performances of the proposed ultra-tightly coupled method based on phase control and the traditional method based on frequency control in signal jamming and high dynamic environments were test and compared. The test results indicate that the proposed ultra-tightly coupled method has a more stable positioning performance,and can improve 7 d B anti-jamming capability compared with the tightly coupled method.更多还原