一种空间目标大时宽雷达回波处理方法

A Method of Big Pulse Width Radar Echo Signal Processing for Space Objects Detection

空间目标距离很远,为充分利用雷达时间资源,可采用单基地收发分置的方式,发射脉冲宽度远大于探空雷达的单脉冲信号,即大时宽信号,以探测更远、更小和更多的目标。而空间目标高速运动的特性将导致回波信号出现距离和多普勒徙动,引起积累增益损失,时宽越大损失越严重。为此,提出一种基于运动补偿的大时宽回波信号处理方法,用于跟踪阶段的目标距离的精确获取,仿真结果表明:该方法可以有效消除目标高速运动的影响,准确地完成距离估计,并且逼近精度理论下界。

Space targets are very far, for saving the time resource, it can be used by the special way that the radars for sending and receiving signal are very close, and a much big pulse width of the radar signal, namely big pulse width radar signal, is needed, to detect farther, smaller and more targets. But the space targets move so fast that can＇t accumulate the energy of echo signal through simply pulse compression because of the migration of range and Doppler profile, and the pulse width is bigger, the loss of energy is more. For this reason, a method of big pulse width radar echo signal processing based on suppressing the influence of movement is proposed, which be used to get the range of the targets precisely in the tracking step. The simulation results show that it can elimi- nate the effects of high speed movement of the space targets effectively, estimate the ranges of space targets accurately, and ap- proach the theoretical lower bound of the range estimation accuracy.