基于常规多普勒滤波器组结构的合成宽带距离像性能分析

ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2009, Vol. 30 ›› Issue (6): 1096-1102.

• Avionics and Autocontrol • Previous Articles Next Articles

Analysis of Synthetic Wideband Range Profile Based on Conventional Doppler Filter Banks

Peng Wei¹, Wang Xuegang¹, Zhao Jianhong¹, Wu Honggang²

1.School of Electronic Engineering, University of Electronic Science and Technology of China 2.The Second Reseach Institude of Civil Aviation Administration of China

Received:2008-04-21 Revised:2008-10-15 Online:2009-06-25 Published:2009-06-25
Contact: Peng Wei

Abstract

Abstract: In order to prevent the deleterious effects of dispersion for wideband signals, a wideband signal can be synthesized by combining coherently several individual narrow band components; meanwhile, clutter mitigation as well as estimation and discrimination of target velocity is enabled by processing the coherent pulse trains in each subband. However, the separate and independent processing using conventional Doppler filter banks in a subband can introduce deleterious effects of target Doppler dispersion among subbands and cause distortion on synthesized onedimensional range profile. This article first analyzed the mismatch outputs of Doppler filter banks caused by target Doppler dispersion among subbands, and then derived an equation to calculate the shift of high resolution range profile for moving targets and obtained a critical velocity suitable for conventional Doppler filter banks. The conclusion is verified by simulation results.

Key words: radar imaging, synthetic wideband waveform, target Doppler dispersion effects, subband, filter banks

CLC Number:

TN959.6

Peng Wei;Wang Xuegang;Zhao Jianhong;Wu Honggang. Analysis of Synthetic Wideband Range Profile Based on Conventional Doppler Filter Banks[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2009, 30(6): 1096-1102.

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Analysis of Synthetic Wideband Range Profile Based on Conventional Doppler Filter Banks

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