Based on the theory of ISAR, using simple maths methods, the method of using arbitrary times polynomial simulation for the nonlinearity testing of LFM signal is studied for the first time.

• 从基本的ISAR成像知识出发，运用简单的数学方法，首次对用任意次曲线来模拟扫频非线性曲线的方法进行了研究。