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针对编队机群目标的低分辨雷达回波多普勒信号的线性调频数学模型 ,采用先作自适应Chirp信号分解再作维格纳维利分布 (WVD)的自适应 Chirp表示方法。由于分解所选基函数能够较好匹配雷达回波信号 ,因而在分析结果中产生的交叉项较少 ,同时具有较高的时频分辨率和抗噪声能力。采用自适应 Chirp表示对实测编队目标的雷达回波信号进行分析 ,证明了该方法能够有效地实现雷达多目标分辨。
Aiming at the chirp mathematical model of low resolution radar Echo Doppler signal of formation fleet target, an adaptive Chirp representation method using adaptive Chirp signal decomposition and then Wigner Wiley Distribution (WVD) is used. Since the selected basis function can well match the radar echo signal, the cross term in the analysis result is less, and the time-frequency resolution and anti-noise ability are higher. The adaptive Chirp representation is used to analyze radar echo signals of the measured formation targets, which proves that this method can effectively achieve radar multi-target resolution.