扩频定位系统中一种利用导引符号提取载波差分相位的方法

考虑利用载波相位进行测距的扩频无线电导航系统,该文提出了一种基于导引符号的两导航台载波差分相位的提取方法。该方法利用扩频码区分出来自不同导航台的发射信号,同时抑制导航台间的相互干扰。给出了该方法提取两导航台载波差分相位的数学模型,并分析了该方法提取的差分相位的均值及误差,进行了计算机仿真。结果表明,在高信噪比环境中,分析及仿真结果十分相近。

A Method of Acquiring Carrier Difference Phase in Spread Spectrum Orientation System by Pilot Symbols

Considering the spread spectrum orientation systems using difference carrier phase to measure distance, this paper proposed a method for acquiring difference carrier phase by using pilot symbol. Using the spread-spectrum codes, signals from different transmitters can be distinguished, and the interstation interference is depressed. In the paper, the mathematical model for the proposed method is deduced, and the mean and variance of the acquired carrier difference phase of the proposed method are analyzed and simulated. The results show that the method is valid.