Performance analysis of target acceleration resolution for radar based on ambiguity function

Under the circumstance that the acceleration of moving target on the radar signal processing is getting higher, the acceleration ambiguity function of the linear frequency modulation (LFM) radar signal is studied. The mathematical analysis demonstrates that for a monostatic radar, the spectrum bandwidth of Doppler frequency widens gradually with the increase of target acceleration till some peaks appear, and the Doppler frequency resolution degrades synchronously. The shape of bistatic acceleration ambiguity function is affected by the position of the target. Decreasing the baseline range or changing the look angle of the receiver can improve the target acceleration resolution of bistatic radar. Matlab simulation proves the effectiveness of this method. The results can also provide significant information for analysis of monostatic and bistatic radar detection performance to accelerate target.