利用插值法提高PD雷达测距测速精度

脉冲多普勒(PD)雷达是在动目标显示雷达基础上发展起来的一种新型雷达体制,这种雷达具有同时测距和测速能力。该体制雷达的常规测量方法是利用回波强度最大采样点来确定目标信息,但测量误差较大,已不能满足对测量精度要求较高的现代火控雷达等的需求。为此提出了一种对目标回波主瓣面积作梯形近似并插值估计出回波强度真实最大值点位置的方法———插值法,该方法从回波波形的特点入手,原理简单易懂,可在计算量增加不大的情况下大大提高测量精度,仿真结果验证了其有效性。

Improving Range and Velocity Measurement Precision of PD Radar with Interpolating Method

Pulse Doppler（PD） radar is able to measure the range and velocity of the target simultaneously. It usually uses the maximum sampling of echo intensity to determine target information. However, this subjects to bigger measurement errors and already cannot satisfy the needs of modern fire control radar which demands higher accuracy. Therefore, a new method named interpolating method is put forward. This method makes trapezoid approximation and interpolation of the target echo area to estimate the maximum points of echo intensity. It bases on the trait of echo waveform. Its principle is simple and the measurement precision is greatly increased under the condition of little calculation amount. In addition, simulation results show its validity.