Enhanced maneuvering targets detection via polynomial phase modeling in over-the-horizon radar
Kun Lu - Shanghai Jiao Tong University, Xingzhao Liu - Shanghai Jiao Tong University
Tue, 27 April 2004, 3:20 PM - 4:10 PM
This paper describes a processing algorithm based on polynomial phase modeling scheme that increases visibility of maneuvering targets in HF over-the-horizon radar (OTHR). For the presence of the echo backscattered by the target that has significantly varying radial velocity within a coherent integration time (CIT), it is difficult for traditional coherent processing to centralize energy and peak in Doppler spectrum. Due to the polynomial property of the phase of maneuvering target radar echo, a polynomial phase signal (PPS) is introduced to model the complex Doppler variation of maneuvering targets. As an effective method to estimate the parameters of PPS, high-order ambiguity function (HAF) based algorithm is applied. And a compensation process follows to eliminate the coherent processing loss (CIL) caused by irregular motion of targets. The experimental results are given to illustrate the validity and efficiency of the proposed method.
Mr. Kun Lu - Shanghai Jiao Tong University
Kun Lu was born in 1977 and received BE Degree in 1999 at the Dept. of Electronic Eng. of Harbin Institute of Technology. Right now he is a doctoral candidate at the Department of Electronic Engineering of Shanghai Jiao Tong University.
His research interests include signal processing applied in HF skywave OTHR.
Dr. Xingzhao Liu - Shanghai Jiao Tong University
Xingzhao Liu was born in 1962 and received Ph. D. Degree in 1995 at Dept. of EE of the University of Tokushima, Japan. Right now he is a professor at the Department of Electronic Engineering of Shanghai JiaoTong University.
His interests mainly include HF and SAR radar signal processing.