Waveform Design and Imaging Algorithm Research of Random Frequency Stepped Chirp Signal ISAR
He Jin① Luo Ying① Zhang Qun①② Yang Xiao-you①
①(Telecommunication Engineering Institute, Air Force Engineering University, Xi’an 710077, China) ②(Key Laboratory of Wave Scattering and Remote Sensing Information (Ministry of Education), Fudan University, Shanghai 200433, China)
Abstract：Frequency-stepped chirp signal is an effective radar signal which can utilize the digital signal processing to obtain high range resolution with relatively narrow instantaneous bandwidth. Because the anti-jamming ability of frequency-stepped chirp signal radar is not enough, the random frequency-stepped chirp signal is designed, and a random frequency-stepped chirp signal ISAR imaging algorithm based on compress sensing theory is proposed. The range profile and high resolution 2-D ISAR image can be obtained with fewer subpulses. Then, the target velocity’s influence on frequency-stepped chirp signal radar imaging is analyzed, the random frequency-stepped chirp signal which contains velocity measuring subpulses is designed, and the velocity estimate and compensation method which is combined with time-frequency analysis, Radon transform and binary mathematical morphology is proposed. The simulation verifies the capability of random frequency-stepped chirp signal ISAR and effectiveness of the imaging algorithm proposed in this paper.
何劲, 罗迎, 张群, 杨小优. 随机线性调频步进雷达波形设计及成像算法研究[J]. 电子与信息学报, 2011, 33(9): 2068-2075.
He Jin, Luo Ying, Zhang Qun, Yang Xiao-You. Waveform Design and Imaging Algorithm Research of Random Frequency Stepped Chirp Signal ISAR. , 2011, 33(9): 2068-2075.
2011, Vol. 33 
