【摘要】：雙音多頻(DTMF)技術(shù)在頻段上的復(fù)用可以增加水聲通信技術(shù)中單位時間內(nèi)傳遞的信息量,在通信效率上相比于單音頻通信技術(shù)有明顯提升。所以雙音多頻技術(shù)在水聲通信中的進步能夠為海洋領(lǐng)域的發(fā)展提供堅實的基礎(chǔ),具有較好的研究價值和應(yīng)用前景。本文通過研究雙音多頻通信中相關(guān)目標(biāo)頻點與其頻點因數(shù)變換之間的數(shù)值關(guān)系,以傳統(tǒng)Goertzel算法的濾波原理為基礎(chǔ),深入分析數(shù)字濾波中導(dǎo)致頻譜偏移、失真的窗形截短和頻譜泄露問題,對Goertzel濾波算法進行有效功率譜頻點的校正和頻譜泄露的線性補償。設(shè)計并實現(xiàn)一種基于雙音多頻增強型Goertzel濾波算法的動態(tài)信息檢測系統(tǒng)。本論文的主要工作包括：1)提出一種頻譜校正的增強型Goertzel濾波算法。該算法以傳統(tǒng)Goertzel算法為基礎(chǔ),本文分析非整數(shù)頻點因數(shù)在Goertzel算法遞歸迭代中的可行性,通過對目標(biāo)頻點的校正對功率譜計算過程進行優(yōu)化,提高對雙音多頻信號流軟件解碼過程中目標(biāo)頻點功率譜幅值的可識別度,并通過軟件仿真和硬件系統(tǒng)實驗對此進行了驗證。2)提出一種頻譜泄露補償型Goertzel濾波算法。該算法在頻譜校正的增強型Goertzel濾波算法的基礎(chǔ)上引入與目標(biāo)頻點對應(yīng)的功率譜失真問題,在分析數(shù)字采樣和窗形截短對雙音多頻信號頻譜泄露的疊加影響后,提出分級泄露頻點的的線性補償算法,對頻譜校正的增強型Goertzel濾波算法在功率譜泄露上進行修正,通過軟件仿真和硬件系統(tǒng)實驗證實目標(biāo)頻點功率譜幅值的可識別度在雙音多頻信號解碼過程中的提高。3)設(shè)計并實現(xiàn)一種基于雙音多頻增強型Goertzel濾波算法的動態(tài)信息檢測系統(tǒng)。在本系統(tǒng)的設(shè)計中提出由甲板單元和水下主機單元構(gòu)成的主機部分以及由信標(biāo)分機和管道內(nèi)部檢測單元構(gòu)成的分機部分的設(shè)計結(jié)構(gòu),明確各部分詳細的設(shè)計方案并進行實現(xiàn)。通過實驗對比可以得出改進的Goertzel算法檢測效果由于傳統(tǒng)算法以及硬件解調(diào)方案。
[Abstract]:The multiplexing of dual-tone and multi-frequency (DTMF) technology in frequency band can increase the amount of information transferred in the unit time of underwater acoustic communication technology, and the communication efficiency is obviously improved compared with that of single audio communication technology. Therefore, the progress of dual-tone multi-frequency technology in underwater acoustic communication can provide a solid foundation for the development of ocean, and has good research value and application prospect. In this paper, we study the numerical relationship between the frequency points of the target and the frequency factor transformation in the dual-tone multi-frequency communication. Based on the filtering principle of the traditional Goertzel algorithm, we deeply analyze the spectrum offset caused by the digital filtering. The problem of window truncation and spectrum leakage of distortion is used to correct the effective power spectrum frequency points and compensate the spectrum leakage linearly for the Goertzel filtering algorithm. A dynamic information detection system based on dual-tone multi-frequency enhanced Goertzel filtering algorithm is designed and implemented. The main work of this thesis is as follows: 1) an enhanced Goertzel filtering algorithm for spectrum correction is proposed. Based on the traditional Goertzel algorithm, this paper analyzes the feasibility of the non-integer frequency factor in the recursive iteration of the Goertzel algorithm, and optimizes the power spectrum calculation process by correcting the target frequency points. The recognition degree of power spectrum amplitude of target frequency point in the process of software decoding of dual-tone multi-frequency signal stream is improved, and it is verified by software simulation and hardware system experiment. 2) A spectrum leakage compensated Goertzel filter algorithm is proposed. Based on the enhanced Goertzel filtering algorithm for spectrum correction, the power spectrum distortion problem corresponding to the target frequency point is introduced. After analyzing the superposition effect of digital sampling and window truncation on the spectrum leakage of dual-tone multi-frequency signals, A linear compensation algorithm for hierarchical leakage frequency points is proposed. The enhanced Goertzel filtering algorithm for spectrum correction is modified on power spectrum leakage. Software simulation and hardware system experiments show that the recognizability of target power spectrum amplitude is improved in the decoding process of dual-tone multi-frequency signal. 3) Design and implementation of a dual-tone multi-frequency enhanced Goertzel filter algorithm State information detection system. In the design of the system, the design structure of the host part composed of the deck unit and the underwater main engine unit and the extension part composed of the beacon extension and the pipeline internal inspection unit is put forward, and the detailed design scheme of each part is made clear and realized. The experimental results show that the improved Goertzel algorithm is based on the traditional algorithm and the hardware demodulation scheme.
【學(xué)位授予單位】：北京工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN929.3

【參考文獻】

相關(guān)期刊論文 前10條

1 徐靈飛;章紅;林浩冬;;改進DTMF信號檢測方案在定點DSP上的實現(xiàn)[J];電訊技術(shù);2012年05期

2 邵明東;;改進Goertzel算法的DTMF信號檢測的仿真與應(yīng)用[J];電聲技術(shù);2009年12期

3 潘兆群;雙音多頻信號接收芯片MT8870的高效使用方法[J];電信技術(shù);1995年08期

4 管慶 ,徐勝;雙音多頻DTMF技術(shù)在DSP系統(tǒng)中的實現(xiàn)[J];今日電子;2003年11期

5 袁兆凱;隋天宇;李宇;黃海寧;;水聲擴頻通信中多普勒估計與補償算法研究[J];電子與信息學(xué)報;2012年01期

6 曹翌;丁康;楊志堅;;離散頻譜校正方法的抗噪性能研究[J];制造業(yè)自動化;2011年13期

7 趙霞;雙音多頻信號產(chǎn)生及解碼的研究[J];微電子學(xué);2001年06期

8 許肖梅;;水聲通信與水聲網(wǎng)絡(luò)的發(fā)展與應(yīng)用[J];聲學(xué)技術(shù);2009年06期

9 宮元九,王欣;雙音多頻信號的軟件解碼[J];沈陽建筑工程學(xué)院學(xué)報;1997年02期

10 劉偉;張育釗;;基于Goertzel算法的亞音頻識別方法[J];通信技術(shù);2014年02期

，

本文編號：2424978