【摘要】：隨著計算機技術(shù)和微電子技術(shù)的快速發(fā)展,信號處理技術(shù)逐漸從模擬化方式轉(zhuǎn)變成數(shù)字化方式并被廣泛應(yīng)用于數(shù)字通信、語音和圖像處理、頻譜分析、信號檢測和自動控制等領(lǐng)域。確知信號回波檢測技術(shù)是人類的又一大應(yīng)用,被廣泛應(yīng)用于生命探測,物體無損檢測、目標識別與定位、軍艦水下通信,飛機雷達障礙物測距和聲紋識別等。因此,研究出快速、高效、精準、具有通用性的確知信號回波檢測系統(tǒng)對生命探測,發(fā)展高新技術(shù),國防信息安全處理具有十分重要的意義。在此背景下,本文對確知信號回波的檢測方法進行研究。通過在時域和頻域范圍對該類確知信號回波的特點及性質(zhì)進行分析,發(fā)現(xiàn)它們具有一些共同的特點：(1)確知信號回波幅度很小,常常被淹沒在接收信號的各種雜波和背景噪聲中。(2)頻帶易于噪聲發(fā)生重疊,由于這些干擾信號的頻帶遠比確知信號回波的頻帶寬易相互重疊,因此干擾信號是不能通過濾波的方法去除的。(3)確知信號回波特征己知且與參考信號存在相關(guān)性,由于將發(fā)射波作為參考信號,它的的特征是已知的；在檢測端接受到的確知信號回波的特征與發(fā)射波是同一個波,只是產(chǎn)生了傳輸時延;因此參考信號與接收的確知信號回波是相關(guān)的。針對上述問題,在此基礎(chǔ)上,利用特點(3)提出一種基于DSP的確知信號回波檢測系統(tǒng)設(shè)計方案。它利用參考信號信號的特征是已知的,參考信號與接收的確知信號回波相關(guān)與噪聲不相關(guān)這些特征。通過系統(tǒng)仿真發(fā)現(xiàn)其特點是不論回波信號的幅度大小,當(dāng)接受到的確知信號回波中含有參考信號時,確知信號回波與參考信號的互相關(guān)性最大；確知信號回波檢測方法實現(xiàn)簡單,電路易集成且檢驗結(jié)果不受濾波器的限制；針對確知信號回波檢測而言,此檢測系統(tǒng)具有通用性；確知信號回波檢測方法采用數(shù)字化方式相比于傳統(tǒng)方式提高了相關(guān)檢測的精度和可靠性,而且可以降低成本,易于升級換代。論文的研究工作主要體現(xiàn)在如下幾個方面：其一,首先通過收集大量與確知信號回波檢測相關(guān)的文獻資料,對國內(nèi)外確知信號回波檢測技術(shù)發(fā)展現(xiàn)狀進行了總結(jié)和分析,在研究和掌握現(xiàn)有理論和手段基礎(chǔ)上,重點進行了利用數(shù)字處理手段來解決確知信號回波檢測的具體實現(xiàn)方法。其二,根據(jù)確知信號回波與接收設(shè)備的模板信號間的信號相關(guān)性和模板信號與干擾信號無相關(guān)性這區(qū)別,探討了以此為基礎(chǔ),利用DSP芯片實現(xiàn)確知信號相關(guān)檢測算法的設(shè)計,從而解決回波信號檢測設(shè)備的低成本、穩(wěn)定性、靈活性、通用性問題。其三,在MATLAB環(huán)境下,對不同信噪比的雷達確知信號回波檢測過程進行仿真與分析。其四,在嵌入式集成開發(fā)環(huán)境CCS5.2下,深入研究確知信號回波相關(guān)檢測算法及DSP芯片的硬件開發(fā)技術(shù)和軟件編程技術(shù)以及調(diào)試技巧：利用TI公司的16位定點DSP芯片TMS320VC5509APGE的硬件進行了檢測系統(tǒng)的設(shè)計；利用匯編和C語言編寫了DSP的確知信號回波相關(guān)檢測算法,并在CCS上進行了調(diào)試和功能仿真；在此過程中掌握了程序開發(fā)方法、調(diào)試工具的使用、多種開發(fā)語言嵌套使用的方法以及程序的優(yōu)化技巧。仿真結(jié)果證明了研究結(jié)果與系統(tǒng)設(shè)計的正確性,實現(xiàn)了功能要求和設(shè)計目標。本課題研究的確知信號回波相關(guān)檢測技術(shù)的基本理論及實現(xiàn)方法經(jīng)測試表明,實際電路的工作和測試結(jié)果基本與理論研究的相關(guān)結(jié)果相吻合,為確知信號回波檢測系統(tǒng)的設(shè)計以及確知信號回波檢測方法和相關(guān)運算功能擴展應(yīng)用的實現(xiàn)提供參考。利用相關(guān)運算檢測出在復(fù)雜背景噪聲中的確知信號回波的技術(shù),還可運用于礦難、地震災(zāi)害中生命探測,軍事電子對抗、聲紋識別、為軍事信息安全相關(guān)領(lǐng)域提供了理論及技術(shù)支持,為以后從事信號處理和DSP硬件研發(fā)工作積累了經(jīng)驗。
[Abstract]:With the rapid development of computer technology and microelectronics technology, signal processing technology has gradually changed from analog mode to digital mode and is widely used in digital communications, speech and image processing, spectrum analysis, signal detection and automatic control and other fields. It can be used in life detection, non-destructive detection of objects, target recognition and location, underwater communication of warships, radar obstacle ranging and voiceprint recognition of aircraft, etc. Therefore, it is very important to develop a fast, efficient, accurate and universal certainty signal echo detection system for life detection, development of high-tech, national defense information security processing. Under this background, this paper studies the detection method of the ascertained signal echo. By analyzing the characteristics and properties of the echo in time domain and frequency domain, it is found that they have some common characteristics: (1) the ascertained signal echo amplitude is very small, and is often submerged in various clutters and background noises of the received signal. (2) Frequency band is liable to overlap noise, because the frequency bands of these interference signals are much easier to overlap than those of the known signal echoes, so the interference signals can not be removed by filtering the waves. (3) The characteristics of the signal echoes are known and correlated with the reference signals, because the transmitted waves are used as the reference signals, its characteristics are as follows. It is known that the characteristics of the echo received at the detection end are the same as that of the transmitted wave, and only the transmission delay is produced. Therefore, the reference signal is related to the received echo of the known signal. It takes advantage of the known characteristics of the reference signal and the uncorrelated correlation between the reference signal and the received certainty signal echo and the noise. The system simulation shows that the characteristic is that, regardless of the amplitude of the echo signal, when the received certainty signal echo contains the reference signal, the reciprocity between the signal echo and the reference signal is ascertained. The detection method of ascertained signal echo is simple to implement, the circuit is easy to integrate and the test result is not limited by the filter; for ascertained signal echo detection, this detection system is universal; ascertained signal echo detection method uses digital method to improve the accuracy and reliability of correlation detection compared with the traditional method. The research work of this paper is mainly embodied in the following aspects: firstly, by collecting a large number of documents and materials related to the detection of the known signal echo, this paper summarizes and analyzes the development status of the detection technology of the known signal echo at home and abroad, and studies and grasps the existing theory and hands. Secondly, according to the difference between the signal correlation between the echo signal and the template signal of the receiving equipment and the non-correlation between the template signal and the interference signal, this paper discusses the realization of the ascertained signal using DSP chip on the basis of this. The design of correlation detection algorithm solves the problems of low cost, stability, flexibility and versatility of echo signal detection equipment. Thirdly, under MATLAB environment, the echo detection process of radar certainty signal with different signal-to-noise ratio is simulated and analyzed. Fourthly, under embedded integrated development environment CCS5.2, the phase of certainty signal echo is studied deeply. The hardware development technology, software programming technology and debugging skills of the switch detection algorithm and DSP chip are introduced. The detection system is designed by using the hardware of the 16-bit fixed-point DSP chip TMS320VC5509APGE of TI company. The algorithm of the correlation detection of the DSP's deterministic signal echo is compiled by using assembly and C language, and debugged and simulated on CCS. The simulation results prove the correctness of the research results and the system design, and achieve the functional requirements and design goals. The basic signal echo detection technology is known in this paper. Tests show that the actual circuit work and test results are basically consistent with the results of theoretical research. It provides a reference for the design of the ascertained signal echo detection system and the realization of the detection method of ascertained signal echo and the extension of related operation functions. Acoustic echo technology can also be used in mine accidents, earthquake disasters, life detection, military electronic countermeasures, voiceprint recognition, providing theoretical and technical support for military information security related fields, for the future engaged in signal processing and DSP hardware research and development work has accumulated experience.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN911.23

【相似文獻】

相關(guān)期刊論文 前1條

1 裴麗絲;;一次多單體風(fēng)暴和弓形回波過程的多普勒雷達探測特征研究[J];科技導(dǎo)報;2006年09期

相關(guān)會議論文 前5條

1 胡玲;吳強;張殿江;于莉莉;;一次顯著弓形回波特征分析[A];中國氣象學(xué)會雷達氣象學(xué)委員會第三屆學(xué)術(shù)年會文集[C];2008年

2 張志剛;閔莉;張芳松;平海波;王群;韋瑩瑩;周旋;;江蘇鹽城一次冰雹強風(fēng)天氣過程回波特征分析[A];中國氣象學(xué)會2008年年會天氣預(yù)報準確率與公共氣象服務(wù)分會場論文集[C];2008年

3 胡玲;吳強;張殿江;于莉莉;;一次顯著弓形回波特征分析[A];中國氣象學(xué)會2008年年會天氣預(yù)報準確率與公共氣象服務(wù)分會場論文集[C];2008年

4 顏文勝;汪瑛;方一川;;“珊瑚”的多普勒回波特征分析和定位方法的討論[A];中國氣象學(xué)會2006年年會“氣象雷達及其應(yīng)用”分會場論文集[C];2006年

5 李文娟;酈敏杰;;6.10浙江颮線天氣的綜合分析[A];中國氣象學(xué)會2006年年會“氣象雷達及其應(yīng)用”分會場論文集[C];2006年

相關(guān)碩士學(xué)位論文 前3條

1 李俐萍;基于DSP的確知信號回波檢測系統(tǒng)設(shè)計[D];成都理工大學(xué);2015年

2 金龍;江淮地區(qū)弓狀回波時空分布和三維結(jié)構(gòu)特征的雷達分析[D];南京大學(xué);2013年

3 高陽;全信號海面回波模擬器精度分析[D];中國科學(xué)院研究生院（空間科學(xué)與應(yīng)用研究中心）;2007年

，

本文編號：2178549