一种基于时域延时的相位补偿方法

为解决各调频发射机开机时载波初始相位不同引起的相位差对天线方向图的影响,提出一种基于时域延时的相位补偿方法,即采用在发射机前端对调制信号加延时的方法,利用Hilbert变换获得相邻两个调频输出信号的相位差与延时关系,然后利用这个关系去补偿因初始相位不同引起的偏差。仿真实验表明,该方法可有效补偿因初始相位不同对天线方向图的影响。

Phase Compensation Method Based on Time-domain Delay

A phase compensation method based on the time-domain delay （that is, delay the signal before it is modulated） is proposed to eliminate the serious influence on the antenna radiation pattern, which is caused by the difference of carrier wave initial phase among the transmitters when they start to work. The relationship between the delay and phase difference of two adjacent frequency-modulated output signals from the transmitters is acquired by means of Hilbert transform, and then the phase difference is compensated with the relationship. The simulation results show that the influence caused by initial phase difference can be well reduced by adopting this method.