基于双线性间断调频信号的运动参数估计方法

为了解决线性调频雷达存在的距离速度耦合问题,设计了一种采用线性频率调制和频率跳变技术的双线性间断调频脉冲信号。建立了大占空比双线性间断调频脉冲信号的回波模型。分析了高速运动对stretch处理后回波信号相位的影响,给出了一种基于时域互相关、FFT运算和运动补偿技术的运动参数估计的具体步骤。最后通过仿真验证了双线性间断调频脉冲雷达信号的可行性和运动参数估计方法的有效性。

Estimating method of movement parameters based on the double linearly frequency interrupted modulation signal

To solve the range-velocity coupling problem in the LFM radar,a double linearly frequency interrupted modulation pulse signal is designed,in which the linearly frequency modulation technique and the stepped frequency technique both are adopted.The signal model of echo from the double linearly frequency interrupted modulation pulse with large operating duty is established.Based on the analyzing of the effect of high velocity to the phase of signal after stretch processing,a practical procedure of movement parameters estimation is proposed,which adopts correlation processing,FFT and the motion compensating.The simulation result shows that the double linearly frequency interrupted modulation pulse radar signal is feasible and the parameters estimating method is effective.