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基于角度变化率与多普勒频差之间的关系,提出了一种机载单基线多普勒测距方法,该方法将前置角的正弦变化率引入多普勒频移方程,借助于微分变形所产生的角速度参量就能获得被测目标的距离。模拟分析验证了所导出公式的正确性,同时还分析证明了基于角度变化率的直接测距方法和基于多普勒频移变化率的直接测距方法等效,并基于频率分辨率,给出了前置角的临界值。和基于多普勒频移变化率的机载直接测距方法相比,本文所提出的基于角度变化率的直接测距方法具有仅需一次双通道测量,和时间测量无关,不需要假定探测平台必须匀速运动等特点。
Based on the relationship between the rate of change of angle and the Doppler frequency difference, a single baseline Doppler ranging method is proposed. The method introduces the sinusoidal rate of change of the pre-angle into the Doppler frequency shift equation, The angular velocity parameter generated by the differential deformation can obtain the distance of the measured target. The simulation results verify the correctness of the derived formulas, and at the same time, it also proves that the direct distance measurement method based on angular rate of change is equivalent to the direct distance measurement method based on the rate of change of Doppler frequency shift, and based on the frequency resolution, The front angle of the critical value. Compared with the airborne direct ranging method based on the Doppler frequency shift rate, the direct ranging method based on the angular rate of change proposed in this paper has only one dual-channel measurement and has nothing to do with the time measurement. It is not necessary to assume that the detection platform Must be uniform movement and so on.