High-Resolution Time-Frequency Representations Based on the Local Polynomial Fourier Transform for Over-the-Horizon Radars

被引：4
|
作者：
Djurovic, Igor [1 ]
Djukanovic, Slobodan [1 ]
Amin, Moeness G. [2 ]
Zhang, Yimin D. [2 ]
Himed, Braham [3 ]
机构：
[1] Univ Montenegro, Dept Elect Engn, Podgorica 81000, Montenegro
[2] Villanova Univ, Ctr Adv Commun, Villanova, PA 19085 USA
[3] AFRL RYMD, Dayton, OH 45433 USA
来源：
RADAR SENSOR TECHNOLOGY XVI | 2012年 / 8361卷
关键词：
Over-the-horizon radar; instantaneous frequency estimation; Viterbi algorithm; local-polynomial Fourier transform; MANEUVERING TARGET DETECTION;
D O I：
10.1117/12.919954
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this paper, we consider resolving over-the-horizon radar (OTHR) Doppler returns. A high-resolution time-frequency (TF) representation of the received signal is obtained by using the local polynomial Fourier transform (LPFT). From the optimally concentrated LPFT, multicomponent Doppler signatures, which are only several frequency bins apart, are extracted using an instantaneous frequency estimation method based on the Viterbi algorithm. The performance of the proposed method is validated using real data.
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页数：10
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