【摘要】：針對(duì)雷達(dá)對(duì)抗中轉(zhuǎn)發(fā)式欺騙干擾的抑制問題,提出一種基于頻率分集陣列的干擾鑒別方法。頻率分集陣列中,目標(biāo)回波在相鄰陣元間產(chǎn)生的相位差與距離、角度呈線性關(guān)系,而假目標(biāo)不滿足該關(guān)系。對(duì)目標(biāo)回波和多類假目標(biāo)干擾在頻率分集陣列接收端的相位差進(jìn)行理論推導(dǎo),詳細(xì)分析匹配濾波、信號(hào)混合、移頻等因素對(duì)相位差的影響,并給出了假目標(biāo)鑒別的具體流程。理論分析及仿真結(jié)果表明,該方法能準(zhǔn)確提取混合信號(hào)的相位差信息,有效對(duì)抗多種類型的轉(zhuǎn)發(fā)式欺騙干擾,且鑒別性能對(duì)干信比、信噪比均不敏感,具有較強(qiáng)的環(huán)境適應(yīng)性。
[Abstract]:Aiming at the suppression of forward spoofing jamming in radar countermeasure, a frequency diversity array based jamming discrimination method is proposed. In frequency diversity array, the phase difference and distance produced by the target echo between adjacent array elements are linear, but the false target is not satisfied with this relationship. The phase difference between target echo and multiple kinds of false target interference at the receiver end of frequency diversity array is theoretically deduced. The effects of matching filtering, signal mixing and frequency shifting on the phase difference are analyzed in detail, and the specific process of false target identification is given. The theoretical analysis and simulation results show that the proposed method can extract the phase difference information of the mixed signals accurately and effectively resist various types of forwarder spoofing interference. The discriminant performance is insensitive to the signal to signal ratio and signal-to-noise ratio and has a strong adaptability to the environment.
【作者單位】： 空軍工程大學(xué)防空反導(dǎo)學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(61501500)
【分類號(hào)】：TN974

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