【摘要】：針對相關(guān)雜波大大影響了傳統(tǒng)雷達(dá)的檢測性能問題,本文提出了一種認(rèn)知雷達(dá)的序貫信號檢測方法,該方法在二元假設(shè)檢驗(yàn)的基礎(chǔ)上將雷達(dá)整個工作時(shí)間分成兩個階段:估計(jì)和檢測階段。在估計(jì)階段,系統(tǒng)發(fā)射最優(yōu)估計(jì)波形,同時(shí)通過雷達(dá)回波對目標(biāo)沖擊響應(yīng)進(jìn)行估計(jì)更新;在檢測階段,系統(tǒng)利用已經(jīng)獲得的先驗(yàn)知識設(shè)計(jì)最優(yōu)檢測波形且在接收端實(shí)現(xiàn)檢測門限自適應(yīng)。結(jié)果分析和實(shí)驗(yàn)仿真表明:由于聯(lián)合了發(fā)射端的波形優(yōu)化和接收端的序貫判決信息利用,因此大大提高了系統(tǒng)的檢測性能;此外,隨著時(shí)間的增加,目標(biāo)沖擊響應(yīng)的估計(jì)值越來越逼近真實(shí)值,使得估計(jì)檢測概率也越來越趨近于真實(shí)檢測概率,從而在提高性能的同時(shí)也保證了決策的可靠性。
[Abstract]:In view of the problem that correlation clutter greatly affects the detection performance of traditional radar, a sequential signal detection method for cognitive radar is proposed in this paper. Based on the binary hypothesis test, the whole working time of radar is divided into two stages: estimation and detection. In the estimation stage, the system transmits the optimal estimation waveform and updates the target impact response by radar echo. In the detection phase, the system designs the optimal detection waveform by using the acquired prior knowledge and realizes the adaptive detection threshold at the receiver. The results of analysis and experimental simulation show that the detection performance of the system is greatly improved by combining the waveform optimization at the transmitter and the sequential decision information at the receiver. In addition, with the increase of time, the estimated value of target impact response is more and more close to the real value, which makes the estimation detection probability more and more close to the real detection probability, so as to improve the performance and ensure the reliability of decision-making at the same time.
【作者單位】： 電子工程學(xué)院;
【分類號】：TN957.51

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