A novel range-Doppler imaging algorithm with OFDM radar

被引：8
|
作者：
Xia Yang [1 ]
Song Zhiyong [1 ]
Lu Zaiqi [1 ]
Fu Qiang [1 ]
机构：
[1] Natl Univ Def Technol, ATR Key Lab, Changsha 410073, Hunan, Peoples R China
来源：
CHINESE JOURNAL OF AERONAUTICS | 2016年 / 29卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Code symbols; Doppler effect; Estimation accuracy; Orthogonal frequency division multiplexing radar; Range-Doppler image; Single pulse; WAVE-FORM DESIGN;
D O I：
10.1016/j.cja.2016.01.007
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
Traditional pulse Doppler radar estimates the Doppler frequency by taking advantage of Doppler modulation over different pulses and usually it requires a few pulses to estimate the Doppler frequency. In this paper, a novel range-Doppler imaging algorithm based on single pulse with orthogonal frequency division multiplexing (OFDM) radar is proposed, where the OFDM pulse is composed of phase coded symbols. The Doppler frequency is estimated using one single pulse by utilizing Doppler modulation over different symbols, which remarkably increases the data update rate. Besides, it is shown that the range and Doppler estimations are completely independent and the well-known range-Doppler coupling effect does not exist. The effects of target movement on the performances of the proposed algorithm are also discussed and the results show that the algorithm is not sensitive to velocity. Performances of the proposed algorithm as well as comparisons with other range-Doppler algorithms are demonstrated via simulation experiments. (C) 2016 Chinese Society of Aeronautics and Astronautics. Published by Elsevier Ltd.
引用
收藏
页码：492 / 501
页数：10
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