本文選題：FMCW雷達(dá)　切入點(diǎn)：雷達(dá)信號處理　出處：《南京理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：近年來,隨著毫米波器件、電路及天線技術(shù)的提升,毫米波雷達(dá)的應(yīng)用也獲得了很大的發(fā)展。隨著我國經(jīng)濟(jì)的飛速發(fā)展,民用領(lǐng)域?qū)走_(dá)的需求也越來越多。其中,24GHz調(diào)頻連續(xù)波(FMCW)雷達(dá)在汽車防撞、自適應(yīng)巡航控制、交通監(jiān)管等領(lǐng)域均有廣泛的應(yīng)用,人們對此開展了很多的研究。中頻信號處理是整個雷達(dá)系統(tǒng)不可或缺的部分,本文針對24GHz調(diào)頻連續(xù)波雷達(dá)信號處理方法進(jìn)行了較為深入的研究。本論文的主要工作包括兩個方面,算法的研究和硬件平臺的實現(xiàn),具體如下:1、24GHzFMCW雷達(dá)的算法的研究。首先對差拍信號進(jìn)行了數(shù)學(xué)建模,詳細(xì)分析了它的時域和頻域特性,給出了目標(biāo)檢測的數(shù)學(xué)依據(jù);對單目標(biāo)檢測的各個流程如FIR濾波、加窗FFT、恒虛警處理、積累處理等進(jìn)行了研究,給出了一種能提高頻率測量精度的方法;最后,對多目標(biāo)檢測中的不同波形設(shè)計進(jìn)行了研究,針對傳統(tǒng)波形中的多目標(biāo)配對困難的問題,提出了一種改進(jìn)的波形,仿真結(jié)果驗證了方案的可行性。2、基于TMS320C6748的硬件平臺搭建。以TMS320C6748為核心板來搭建硬件平臺,控制采用D/A和A/D模塊輸出所需要的三角波及對中頻信號進(jìn)行采樣,完成基本算法在DSP里的實現(xiàn)。最后,給出實際測試結(jié)果,對算法的正確性和可行性進(jìn)行了驗證。
[Abstract]:In recent years, with the improvement of millimeter-wave devices, circuits and antenna technology, the application of millimeter-wave radar has been greatly developed. Among them, 24GHz FMCW radar is widely used in automobile collision prevention, adaptive cruise control, traffic supervision and so on. People have carried out a lot of research on this. If signal processing is an indispensable part of the whole radar system. In this paper, the signal processing method of 24GHz FM CW radar is studied deeply. The main work of this thesis includes two aspects: the research of algorithm and the realization of hardware platform. The details are as follows: 1) the algorithm of 24GHz FMCW radar is studied. Firstly, the mathematical model of the beat signal is established, the time and frequency domain characteristics of the signal are analyzed in detail, the mathematical basis of target detection is given, and the flow of single target detection, such as FIR filter, is given. Windowed FFT, CFAR processing, accumulation processing and so on are studied, and a method to improve the accuracy of frequency measurement is given. Finally, the design of different waveforms in multi-target detection is studied. In view of the difficulty of multi-target matching in traditional waveforms, an improved waveform is proposed. The simulation results verify the feasibility of the scheme. The hardware platform is built based on TMS320C6748, and the hardware platform is built with TMS320C6748 as the core board. In the control, the if signal is sampled by the triangle wave of D / A and A / D module output, and the realization of the basic algorithm in DSP is completed. Finally, the actual test results are given, and the correctness and feasibility of the algorithm are verified.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN957.51

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本文編號：1578655