目标加速度截获方法研究

Research on target acceleration intercepting

在雷达测量中,由于加速度的影响使速度的测量变得十分困难,因此需要对目标的加速度进行截获并补偿。讨论目标加速度导致信号频谱的变化,分析两种目标加速度截获方法:样板法和共轭法。因为共轭法导致信号的频谱集中在很窄的频域内,所以提出一种改进共轭法来展宽信号频谱,提高估计精度。仿真结果表明,改进共轭法有效并可以很好地捕获目标的加速度信息。

The measurement of velocity is difficult because of the influence of acceleration in radar measurement, so acceleration compensation is necessary. The change of signal spectrum which is caused by target acceleration is discussed. Two methods of target acceleration intercepting, template method and conjugate method, are analyzed. Because the conjugate method leads to signal spectrum concentrate in narrow frequency domain, an improved conjugate method is presented to stretch the signal spectrum and raise the estimation accuracy. The simulation results show that the improved conjugate method is effective and can perfectly intercept the target acceleration information.