【摘要】：MIMO成像雷達(dá)克服了傳統(tǒng)實(shí)孔徑雷達(dá)方位分辨率受天線尺寸限制,合成孔徑雷達(dá)積累時(shí)間過(guò)長(zhǎng)的缺點(diǎn),有著傳統(tǒng)成像雷達(dá)難以比擬的高方位分辨率。在近十年基本理論研究的過(guò)程中,世界各地的科研機(jī)構(gòu)設(shè)計(jì)了各種結(jié)構(gòu)的MIMO成像雷達(dá)系統(tǒng)用于理論的實(shí)際驗(yàn)證。而反觀國(guó)內(nèi),相關(guān)的驗(yàn)證系統(tǒng)非常稀少。因此,本文開(kāi)展了 MIMO成像雷達(dá)硬件系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn)工作,用于相關(guān)理論算法的驗(yàn)證。本文在介紹MIMO雷達(dá)基本原理的基礎(chǔ)上,提出了 MIMO成像雷達(dá)硬件系統(tǒng)的實(shí)現(xiàn)技術(shù)指標(biāo),并給出了具體實(shí)現(xiàn)方案。系統(tǒng)由雷達(dá)信號(hào)波形發(fā)生器、信號(hào)處理平臺(tái)和射頻收發(fā)機(jī)三個(gè)獨(dú)立模塊組成。在實(shí)際使用的過(guò)程中,可以根據(jù)不同的需求對(duì)各個(gè)模塊進(jìn)行相應(yīng)更換。接下來(lái),對(duì)每個(gè)模塊的任務(wù)需求、技術(shù)指標(biāo)、實(shí)現(xiàn)方案和具體硬件實(shí)現(xiàn)進(jìn)行了詳細(xì)的介紹。根據(jù)MIMO成像雷達(dá)常用雷達(dá)信號(hào)波形的特點(diǎn),提出了基于DDS合成技術(shù)的雷達(dá)信號(hào)波形發(fā)生器實(shí)現(xiàn)方案,其具有8個(gè)輸出通道,在0～400 MHz頻帶內(nèi)波形頻率、相位任意可控。然后,對(duì)MIMO成像雷達(dá)所涉及的基本數(shù)字信號(hào)處理技術(shù)進(jìn)行了分析,提出了基于DSP+FPGA雙核架構(gòu)的信號(hào)處理平臺(tái)實(shí)現(xiàn)方案,既滿足了數(shù)字信號(hào)處理大數(shù)據(jù)量、高復(fù)雜度和強(qiáng)實(shí)時(shí)性的要求,又滿足了作為系統(tǒng)主控控制系統(tǒng)各個(gè)模塊的要求。最后,根據(jù)MIMO成像雷達(dá)的技術(shù)指標(biāo)分別給出了使用超外差結(jié)構(gòu)的雷達(dá)射頻收發(fā)機(jī)的技術(shù)指標(biāo)和實(shí)現(xiàn)方案。相應(yīng)的給出了三個(gè)模塊的詳細(xì)電路設(shè)計(jì)與實(shí)現(xiàn)。最后對(duì)MIMO成像雷達(dá)系統(tǒng)的三個(gè)模塊分別進(jìn)行了測(cè)試,給出了測(cè)試結(jié)果。經(jīng)過(guò)分析測(cè)試結(jié)果,可以證明雷達(dá)系統(tǒng)電路設(shè)計(jì)與實(shí)現(xiàn)是正確的,所設(shè)計(jì)的MIMO成像雷達(dá)硬件系統(tǒng)滿足預(yù)期技術(shù)指標(biāo)。
[Abstract]:MIMO imaging radar overcomes the limitation of azimuth resolution of traditional real aperture radar which is limited by antenna size and the accumulation time of synthetic aperture radar is too long. It has high azimuth resolution which is incomparable to traditional imaging radar. In the process of basic theoretical research in the past ten years, various structures of MIMO imaging radar systems have been designed around the world for the practical verification of the theory. On the other hand, at home, the relevant verification system is very rare. Therefore, the design and implementation of MIMO imaging radar hardware system are carried out in this paper. On the basis of introducing the basic principle of MIMO radar, this paper presents the technical specifications of the hardware system of MIMO imaging radar, and gives the concrete implementation scheme. The system consists of three independent modules: radar signal waveform generator, signal processing platform and radio frequency transceiver. In the process of practical use, each module can be replaced according to different requirements. Then, the task requirements, technical specifications, implementation scheme and hardware implementation of each module are introduced in detail. According to the characteristics of radar signal waveforms commonly used in MIMO imaging radar, a scheme of radar signal waveform generator based on DDS synthesis technology is proposed. It has eight output channels, waveform frequency is controlled arbitrarily in the frequency band of 0 ~ 400 MHz and the phase is controlled arbitrarily. Then, the basic digital signal processing technology involved in MIMO imaging radar is analyzed, and the realization scheme of signal processing platform based on DSP FPGA dual-core architecture is proposed, which satisfies the large amount of digital signal processing data. The requirement of high complexity and strong real-time meets the requirements of each module of the main control system. Finally, according to the technical specifications of MIMO imaging radar, the technical specifications and implementation schemes of the radio frequency transceiver using the superheterodyne structure are given respectively. The detailed circuit design and implementation of the three modules are given. Finally, three modules of MIMO imaging radar system are tested, and the test results are given. After analyzing the test results, it can be proved that the design and implementation of the radar system circuit is correct, and the MIMO imaging radar hardware system designed meets the expected technical specifications.
【學(xué)位授予單位】：哈爾濱工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN958

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 葉佩;江濤;;MIMO雷達(dá)成像技術(shù)的研究與應(yīng)用探討[J];企業(yè)技術(shù)開(kāi)發(fā);2013年02期

2 陳浩文;黎湘;莊釗文;;一種新興的雷達(dá)體制——MIMO雷達(dá)[J];電子學(xué)報(bào);2012年06期

3 強(qiáng)勇;張冠杰;李斌;;MIMO雷達(dá)進(jìn)展及其應(yīng)用研究[J];火控雷達(dá)技術(shù);2010年01期

相關(guān)博士學(xué)位論文 前1條

1 王懷軍;MIMO雷達(dá)成像算法研究[D];國(guó)防科學(xué)技術(shù)大學(xué);2010年

相關(guān)碩士學(xué)位論文 前6條

1 尹彥超;K波段車載雷達(dá)接收機(jī)的研究與設(shè)計(jì)[D];南京理工大學(xué);2013年

2 楊明;X波段寬帶雷達(dá)發(fā)射機(jī)的設(shè)計(jì)[D];南京理工大學(xué);2012年

3 王本君;C波段全相參多普勒天氣雷達(dá)系統(tǒng)設(shè)計(jì)[D];電子科技大學(xué);2010年

4 黎文杰;綜合脈沖與孔徑雷達(dá)測(cè)角技術(shù)研究[D];西安電子科技大學(xué);2009年

5 盧中昊;P波段瞬態(tài)極化雷達(dá)射頻分系統(tǒng)研制[D];國(guó)防科學(xué)技術(shù)大學(xué);2008年

6 宗敬群;S波段雷達(dá)接收機(jī)仿真設(shè)計(jì)和實(shí)現(xiàn)[D];南京理工大學(xué);2005年

，

本文編號(hào)：2291404