车载测控系统标校过程中校相新方法研究

Research on New Method of Phase-Calibration in TT&C System

为提高车载测控设备展开和撤收的速度,增强车载设备的机动性能,提出利用偏馈进行校相的方法;该方法简化了车载测控系统的体系结构,校相过程中不需要联试应答机和标校塔的配合,利用偏馈代替联试应答机发射下行信号作为校准源,调整跟踪和/差通道间的相移,使得基带接收解调出的误差电压能准确反映目标的位置;试验结果表明,偏馈校相的相移结果一致性和稳定性较好,精度满足系统的指标要求,且与传统校相的相移结果基本一致;偏馈校相方法可以在车载测控系统中推广使用。

In order to speed up the spread and withdrawal of onboard TT＆C equipment, and to enhance the flexibility of onboard equip ment, this paper puts forward a new calibration method by use of Offset-antenna which can simplify the architecture of onboard TT＆C system. The new method makes use of the downlink carrier-frequency from the Offset-antenna as the signal-source, and adjusts the phase dispersion between sum channel and difference channel, so that the error voltage can indicate the position of the target. The experiment data shows that the result of the new method has good consistency and stability, and can meet the requirement, and also is consistent with the result of traditional method. So the new method can be used in Onboard TT＆C system.