【摘要】：天發(fā)艦收高頻雷達(dá)是對(duì)傳統(tǒng)固定平臺(tái)條件下天地波雷達(dá)系統(tǒng)的進(jìn)一步延伸和發(fā)展,相比于天發(fā)岸收體制提高了雷達(dá)的機(jī)動(dòng)性,然而由于艦載平臺(tái)運(yùn)動(dòng)的影響,使得作為海面狀態(tài)參數(shù)反演信息來(lái)源和海上目標(biāo)檢測(cè)背景的一階海雜波呈現(xiàn)出更多特點(diǎn),因此研究一階海面回波譜有助于天發(fā)艦收高頻雷達(dá)在目標(biāo)檢測(cè)和海洋遙感領(lǐng)域的理論和應(yīng)用研究。本文從信號(hào)處理角度分析了一階海雜波的空時(shí)分布及展寬特性,從電磁散射理論的角度,研究了混合傳播路徑下高頻雷達(dá)系統(tǒng)逐漸復(fù)雜的一階海雜波雷達(dá)截面積方程。首先,建立了天發(fā)艦收高頻雷達(dá)混合傳播路徑的幾何模型,說(shuō)明了固定群距離下海面散射軌跡的橢圓分布,推導(dǎo)了一階海雜波多普勒頻率公式,并分析了系統(tǒng)布局對(duì)空時(shí)分布曲線的影響。此外,在兩種陣列布局下,針對(duì)單根天線、均勻線性陣列,分別研究了擦地角和雙基地角、艦船運(yùn)動(dòng)及電離層相位污染影響下的一階海雜波展寬效應(yīng),最后分析了多因素復(fù)合作用下的一階海雜波展寬效應(yīng)。接下來(lái)從電磁散射的角度,由混合傳播路徑的幾何關(guān)系,推導(dǎo)了電偶極子作為激勵(lì)源通過(guò)混合路徑傳播后位于接收天線處的頻域電場(chǎng)方程;隨后根據(jù)Walsh的電磁散射理論,假設(shè)電離層和海面為隨機(jī)過(guò)程,推導(dǎo)了單基地、雙基地高頻雷達(dá)混合傳播路徑下的一階海雜波RCS方程,并仿真分析了不同電離層擾動(dòng)狀態(tài)、系統(tǒng)布局、風(fēng)向及雷達(dá)工作頻率對(duì)一階譜的影響。最后通過(guò)雙基地天發(fā)岸收高頻雷達(dá)實(shí)驗(yàn)平臺(tái)采集的實(shí)測(cè)數(shù)據(jù)對(duì)建立的一階海雜波模型進(jìn)行了驗(yàn)證。最后,根據(jù)艦載平臺(tái)運(yùn)動(dòng)的幾何運(yùn)動(dòng)位移關(guān)系,修正了混合傳播路徑的電場(chǎng)方程,并推導(dǎo)了艦載平臺(tái)勻速直線運(yùn)動(dòng)時(shí)天發(fā)艦收高頻雷達(dá)一階海雜波RCS方程,通過(guò)仿真實(shí)驗(yàn)研究了不同參數(shù)對(duì)一階海雜波譜的影響;由于海面的復(fù)雜環(huán)境,艦載平臺(tái)在勻速運(yùn)動(dòng)過(guò)程中必然存在著艦船的六維運(yùn)動(dòng),由艦船六維運(yùn)動(dòng)的定義及六維運(yùn)動(dòng)模型,分析了六維運(yùn)動(dòng)對(duì)海面回波散射路徑的影響;在以上工作基礎(chǔ)上,分別推導(dǎo)了六維運(yùn)動(dòng)作用下的一階海雜波RCS方程,表明六維運(yùn)動(dòng)使得一階海雜波產(chǎn)生了調(diào)制譜,并分析了海態(tài)對(duì)一階譜的影響。
文內(nèi)圖片：
圖片說(shuō)明：天發(fā)艦收高頻雷達(dá)系統(tǒng)布局示意圖
[Abstract]:Tianfa ship receiving high frequency radar is a further extension and development of heaven and earth wave radar system under the condition of traditional fixed platform. Compared with Tianfa receiving system, it improves the maneuverability of radar. However, due to the influence of shipborne platform motion, the first order sea clutter, which is the source of inversion information of sea surface state parameters and the background of marine target detection, shows more characteristics. Therefore, the study of first-order sea surface echo spectrum is helpful to the theoretical and applied research of Tianfa ship receiving high frequency radar in the field of target detection and marine remote sensing. In this paper, the space-time distribution and broadening characteristics of first-order sea clutter are analyzed from the point of view of signal processing. From the point of view of electromagnetic scattering theory, the cross-section area equation of first-order sea clutter radar system under mixed propagation path is studied. Firstly, the geometric model of the hybrid propagation path of the receiving high frequency radar is established, the elliptical distribution of the sea surface scattering trajectory at a fixed group distance is explained, the Doppler frequency formula of the first order sea miscellaneous wave is derived, and the influence of the system layout on the space-time distribution curve is analyzed. In addition, under two kinds of array layouts, for a single antenna and a uniform linear array, the broadening effects of first-order sea clutters under the influence of erasing angle and bistatic angle, ship motion and ionosphere phase pollution are studied respectively. finally, the broadening effect of first-order sea clutters under the action of multi-factor combination is analyzed. Then, from the point of view of electromagnetic scattering, from the geometric relationship of the mixed propagation path, the frequency domain electric field equation at the receiving antenna after the electric dipole is propagated through the mixed path as the excitation source is derived. Then, according to Walsh's electromagnetic scattering theory, assuming that the ionosphere and sea surface are random processes, the first-order sea clutter RCS equation under the mixed propagation path of unistatic and bistatic high frequency radar is derived, and the effects of different ionosphere disturbance states, system layout, wind direction and radar frequency on the first-order spectrum are simulated and analyzed. Finally, the first-order sea clutter model is verified by the measured data collected by bistatic Tianfa receiving HF radar experimental platform. Finally, according to the geometric motion displacement relationship of shipborne platform motion, the electric field equation of hybrid propagation path is modified, and the RCS equation of first-order sea clutter of shipborne platform with uniform linear motion is derived. the influence of different parameters on the first-order sea clutter spectrum is studied by simulation experiments. Because of the complex environment of the sea surface, there must be the six-dimensional motion of the ship in the process of uniform motion of the shipborne platform. according to the definition of the six-dimensional motion of the ship and the six-dimensional motion model, the influence of the six-dimensional motion on the scattering path of the sea surface echo is analyzed. On the basis of the above work, the first-order sea clutter RCS equation under the action of six-dimensional motion is derived, which shows that the six-dimensional motion makes the first-order sea clutter produce modulation spectrum, and analyzes the influence of sea state on the first-order spectrum.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN958

【參考文獻(xiàn)】

相關(guān)期刊論文 前5條

1 謝銳;萬(wàn)顯榮;趙志欣;龔子平;柯亨玉;;外輻射源天地波雷達(dá)定位方法及精度分析[J];電波科學(xué)學(xué)報(bào);2014年03期

2 謝銳;萬(wàn)顯榮;洪麗娜;唐慧;易建新;;電離層行進(jìn)式擾動(dòng)對(duì)外輻射源天地波雷達(dá)系統(tǒng)的影響[J];電波科學(xué)學(xué)報(bào);2014年06期

3 姜維;鄧維波;楊強(qiáng);;高頻超視距混合天地波雷達(dá)海雜波特點(diǎn)分析[J];電子與信息學(xué)報(bào);2011年08期

4 楊龍泉;焦培南;凡俊梅;;短波天波/地波聯(lián)合傳播模式下定位方法研究[J];中國(guó)電子科學(xué)研究院學(xué)報(bào);2010年03期

5 焦培南;楊龍泉;凡俊梅;;短波天波反射/地波繞射組合新傳播模式及其可能應(yīng)用[J];電波科學(xué)學(xué)報(bào);2007年05期

相關(guān)博士學(xué)位論文 前2條

1 仇永斌;雙基地高頻地波雷達(dá)海雜波特性研究[D];哈爾濱工業(yè)大學(xué);2011年

2 謝俊好;艦載高頻地波雷達(dá)目標(biāo)檢測(cè)與估值研究[D];哈爾濱工業(yè)大學(xué);2001年

相關(guān)碩士學(xué)位論文 前1條

1 耿鈞;岸基對(duì)海逆合成孔徑雷達(dá)艦船目標(biāo)成像研究[D];哈爾濱工業(yè)大學(xué);2009年

，

本文編號(hào)：2510913