A novel phase parameter estimation method of quadratic FM signal based on Sigmoid fractional ambiguity function in impulsive noise environment

作者：Li, Li^*; Qiu, Tianshuang

来源：AEU-International Journal of Electronics and Communications, 2018, 93: 268-276.

DOI：10.1016/j.aeue.2018.06.012

• Impulsive noise
• Fractional ambiguity function
• Sigmoid transform
• Quadratic FM signal

To overcome the limitations that the second-order statistics based methods rely heavily on gaussianity assumption and the fractional lower-order statistics based methods depend on the priori knowledge of nonGaussian noise, two novel concepts, the Sigmoid transform based instantaneous correlation function and Sigmoid transform based fractional ambiguity function, are defined firstly. Based on these definitions, a novel phase parameters estimation method of the quadratic FM signal is proposed in impulsive noise environment. Furthermore, the property of the Sigmoid transform is presented and proved. Simulations have verified its superior performances over existing methods based on fractional ambiguity function or fractional ambiguity function based on fractional lower order statistic, especially under impulsive noise. Meanwhile, it does not depend on the priori knowledge of noise.

• 出版日期2018
• 单位大连理工大学; 中国人民解放军信息工程大学; 大连大学