【摘要】：機(jī)載雷達(dá)空時(shí)自適應(yīng)處理(space-time adaptive processing,STAP)與單脈沖技術(shù)相結(jié)合可以實(shí)現(xiàn)對(duì)運(yùn)動(dòng)目標(biāo)空、時(shí)參數(shù)的估計(jì)。然而,在非均勻環(huán)境下,由于同分布快拍數(shù)有限,雜波協(xié)方差矩陣難以準(zhǔn)確估計(jì),常常導(dǎo)致STAP方法性能急劇下降甚至失效,進(jìn)而無法有效實(shí)現(xiàn)目標(biāo)檢測(cè)和參數(shù)估計(jì)。本文提出一種直接數(shù)據(jù)域的動(dòng)目標(biāo)空時(shí)參數(shù)估計(jì)方法,該方法首先應(yīng)用幅相估計(jì)譜(amplitude and phase estimation,APES)譜估計(jì)由被檢測(cè)單元數(shù)據(jù)估計(jì)出雜波干擾協(xié)方差矩陣,然后利用STAP技術(shù)抑制雜波和干擾,并結(jié)合單脈沖理論實(shí)現(xiàn)對(duì)目標(biāo)角度和多普勒頻率的估計(jì)。仿真結(jié)果表明,與傳統(tǒng)單脈沖方法相比,新方法具有自適應(yīng)抑制雜波干擾的能力和更好的估計(jì)性能;同時(shí)由于無需參考數(shù)據(jù),該方法更適應(yīng)于非均勻環(huán)境。
[Abstract]:Combined with airborne radar space-time adaptive processing (space-time adaptive processing,STAP) and monopulse technique, the space-time parameters of moving targets can be estimated. However, in the non-uniform environment, due to the limited number of beats in the same distribution, the clutter covariance matrix is difficult to estimate accurately, which often leads to a sharp decline or even failure of the performance of the STAP method, which can not effectively achieve target detection and parameter estimation. In this paper, a direct data domain space-time parameter estimation method for moving targets is proposed. In this method, the clutter interference covariance matrix is estimated from the detected unit data by using the amplitude and phase estimation spectrum (amplitude and phase estimation,APES. Then STAP technique is used to suppress clutter and interference, and the estimation of target angle and Doppler frequency is realized based on monopulse theory. The simulation results show that the new method has the ability of adaptive clutter suppression and better estimation performance than the traditional monopulse method, and it is more suitable for non-uniform environment because of no reference data.
【作者單位】： 中國民航大學(xué)智能信號(hào)與圖像處理天津市重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金(61231017,U1333106) 中央高�；究蒲袠I(yè)務(wù)費(fèi)(3122016D004)資助課題
【分類號(hào)】：TN959.73

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