一种DOR侧音信号相关处理算法研究

差分干涉单向距离测量(Delta Differential One-Way Range,△DOR)是一种比甚长基线干涉测量(Very Long Baseline Interferometry,VLBI)定轨精度更高的测量技术,其被广泛应用在深空航天器的导航中。为了进行测量,航天器要发射专门的DOR侧音信号。介绍了一种DOR侧音信号的相关处理算法及特点,论述了用来求解差分相位的FX型相关处理算法,对侧音信号的整周相位模糊进行了定义建模,并详细讨论了利用低频DOR侧音解模糊的原理和方法,通过仿真验证了算法的正确性。

Research on Correlation Algorithm of DOR Tones

△DOR is a much more useful measurement for orbit determination than VLBI,which is widely used in deep space navigation.To enable the measurement,a spacecraft must emit several tones.The correlation algorithm of DOR tones is described.Firstly,the FX correlation algorithm is introduced,which is used to get differential phase.Then,the phase cycle ambiguity of DOR tones is defined and the method of resolution of phase ambiguity with a lower-frequency DOR tone is discussed.Finally,the simulation results show that the algorithm is correct.