本文選題：FMCW雷達(dá) + MATLAB軟件�。� 參考：《沈陽理工大學(xué)》2017年碩士論文

【摘要】：近年來,調(diào)頻連續(xù)波(FMCW)雷達(dá)由于具有結(jié)構(gòu)簡單、無距離盲區(qū)、分辨力高、發(fā)射功率低和抗雜波能力強(qiáng)等優(yōu)點(diǎn),在精確武器制導(dǎo)、交通管制與檢測、汽車防撞系統(tǒng)、樓層測量、液面高度測量等領(lǐng)域得到迅猛發(fā)展和應(yīng)用。本文通過對(duì)FMCW雷達(dá)測距相關(guān)理論及差頻信號(hào)處理的研究與分析,設(shè)計(jì)實(shí)現(xiàn)了FMCW雷達(dá)測距系統(tǒng)并進(jìn)行了相關(guān)實(shí)驗(yàn)研究。首先,詳述了FMCW雷達(dá)的工作原理,并對(duì)鋸齒波FMCW雷達(dá)的測距理論進(jìn)行了詳細(xì)的闡述與分析。在現(xiàn)有理論的支持下,采用Mini-circuits公司的射頻器件設(shè)計(jì)實(shí)現(xiàn)了小型的雷達(dá)實(shí)驗(yàn)系統(tǒng),并對(duì)所采用的相關(guān)射頻器件特點(diǎn)及參數(shù)進(jìn)行了詳細(xì)的介紹。在對(duì)雷達(dá)的回波功率譜進(jìn)行了詳細(xì)的分析之后,從系統(tǒng)和隨機(jī)兩個(gè)方面論述了影響FMCW雷達(dá)測距精度的因素。從頻譜角度出發(fā),提出能夠提高FMCW雷達(dá)測距精度的譜最大值估值算法,并進(jìn)行了相關(guān)實(shí)驗(yàn)進(jìn)行驗(yàn)證。利用自主設(shè)計(jì)的FMCW雷達(dá)實(shí)驗(yàn)系統(tǒng),進(jìn)行了多普勒頻移測速和線性調(diào)頻波測距兩個(gè)實(shí)驗(yàn),使用MATLAB軟件對(duì)實(shí)驗(yàn)得到的雷達(dá)信號(hào)進(jìn)行數(shù)據(jù)處理,通過分析差頻信號(hào)的時(shí)域與頻域,獲得目標(biāo)距離和速度的信息。并分別從前期準(zhǔn)備、實(shí)驗(yàn)流程數(shù)據(jù)采集、實(shí)驗(yàn)結(jié)果以及所用到的相關(guān)代碼等方面對(duì)所做實(shí)驗(yàn)進(jìn)行了詳細(xì)的描述。實(shí)驗(yàn)證明,所設(shè)計(jì)的FMCW實(shí)驗(yàn)系統(tǒng)具有成本低、體積小、性能優(yōu)良等特點(diǎn),可用于FMCW雷達(dá)信號(hào)處理算法的教學(xué)與研究,所采用的譜最大值估值算法可提高測距精度。
[Abstract]:In recent years, FM continuous Wave (FMCW) radar has many advantages, such as simple structure, no blind area, high resolution, low transmitting power and strong ability to resist clutter. FMCW radar has many advantages such as precision weapon guidance, traffic control and detection, automobile anti-collision system, floor measurement, etc. Liquid level height measurement and other fields have been rapidly developed and applied. Based on the research and analysis of FMCW radar ranging theory and differential frequency signal processing, the FMCW radar ranging system is designed and implemented, and related experiments are carried out in this paper. Firstly, the working principle of FMCW radar is described in detail, and the ranging theory of saw tooth wave FMCW radar is described and analyzed in detail. With the support of existing theories, a small radar experimental system is designed and implemented by using the RF device of Mini-circuit Company, and the characteristics and parameters of the relevant RF device are introduced in detail. After a detailed analysis of the echo power spectrum of the radar, the factors affecting the ranging accuracy of the FMCW radar are discussed from the system and random aspects. From the spectrum point of view, a spectrum maximum estimation algorithm which can improve the range accuracy of FMCW radar is proposed and verified by relevant experiments. Using the FMCW radar experimental system designed by ourselves, two experiments of Doppler frequency shift velocity measurement and linear frequency modulation wave ranging are carried out. The radar signal obtained from the experiment is processed by MATLAB software, and the time domain and frequency domain of the difference frequency signal are analyzed. Get information about the distance and speed of the target. The experiments are described in detail from the aspects of preparation, data collection, experimental results and related codes. Experimental results show that the designed FMCW experimental system has the advantages of low cost, small volume and excellent performance. It can be used in the teaching and research of FMCW radar signal processing algorithm, and the spectrum maximum estimation algorithm can improve the ranging accuracy.
【學(xué)位授予單位】：沈陽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN957.51

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