基于信道多普勒特征的外辐射源雷达杂波抑制方法

doi:10.3969/j.issn.1001-506X.2021.01.08

Abstract

Abstract:

A clutter suppression method of the passive radar based on channel Doppler characteristic is proposed utilizing the orthogonal frequency division multiplex (OFDM) modulation characteristic of the digital broadcasting signal. The proposed method first obtains the frequency domain channel response of each OFDM symbol in the subcarrier domain. Then the channel response is transformed into time domain. The clutter subspace term is constructed by the channel Doppler feature in the time domain, which is used to suppress the zero-frequency and non-zero-frequency clutter. The constructed clutter subspace in the proposed method is independent of the transmitted signal and can be generated offline, which simplifies the signal processing and reduces the computational complexity. The validity of the proposed method is verified by the simulation and measured data.

Key words: digital broadcasting signal, passive radar, orthogonal frequency division multiplex (OFDM), clutter suppression

CLC Number:

TN958.97

Yuqi LIU, Xianrong WAN, Jianxin YI, Hengyu KE. Clutter suppression method for passive radar based on channel Doppler characteristic[J]. Systems Engineering and Electronics, 2021, 43(1): 55-61.

Figures/Tables 11

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Clutter suppression method for passive radar based on channel Doppler characteristic

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