【摘要】：近年來,隨著無線通信技術(shù)的不斷革新以及對(duì)講機(jī)在行業(yè)中應(yīng)用的逐步深入,用戶對(duì)于無線對(duì)講機(jī)的需求迅速攀升。在鐵路運(yùn)輸、船舶通信、建筑公司、娛樂場所、物流運(yùn)輸以及公安系統(tǒng)等眾多通信專用領(lǐng)域,對(duì)講機(jī)發(fā)揮的作用越來越大,因此對(duì)講機(jī)的研究變得日益重要。隨著對(duì)講機(jī)的使用率逐步提升,有限的頻率資源已無法滿足日益增長的廣播和專用無線用戶需求。傳統(tǒng)的模擬通信對(duì)講機(jī)對(duì)頻譜的利用效率低,并且模擬對(duì)講機(jī)的功能和使用范圍變得越來越受限制,因此隨著無線通信系統(tǒng)的飛速發(fā)展,數(shù)字對(duì)講機(jī)的使用范圍和作用越來越受到人們的重視。對(duì)講機(jī)通信正逐步經(jīng)歷由模擬對(duì)講機(jī)通信向數(shù)字對(duì)講機(jī)通信的轉(zhuǎn)變。由歐洲電信標(biāo)準(zhǔn)協(xié)會(huì)發(fā)布的DMR協(xié)議是專業(yè)的數(shù)字移動(dòng)通信標(biāo)準(zhǔn)。該協(xié)議能很高效的利用頻譜資源并且還可以兼容模擬常規(guī)。其業(yè)務(wù)功能豐富,可以擴(kuò)展也可以向后兼容。同時(shí),系統(tǒng)和終端以及總體運(yùn)營維修的成本較低,網(wǎng)絡(luò)建設(shè)速度較快。隨著數(shù)字對(duì)講機(jī)研究的迅速發(fā)展,數(shù)字對(duì)講機(jī)的測試也變的越來越重要。良好的測試技術(shù)能夠保證數(shù)字對(duì)講機(jī)的研發(fā)高效快速,能夠能快的找到設(shè)計(jì)上的錯(cuò)誤,給用戶的產(chǎn)品提供保障,同時(shí)數(shù)字對(duì)講機(jī)的質(zhì)量也就有了很好的保障。這對(duì)數(shù)字對(duì)講機(jī)的大規(guī)模生產(chǎn)有很重大的意義。因此本文重點(diǎn)研究了基于DMR協(xié)議的數(shù)字對(duì)講機(jī)的測試,通過本文的研究希望能對(duì)DMR數(shù)字對(duì)講機(jī)的發(fā)展和研究有更多的幫助。本文根據(jù)國內(nèi)外DMR系統(tǒng)的數(shù)字對(duì)講機(jī)的發(fā)展現(xiàn)狀和發(fā)展趨勢,對(duì)DMR系統(tǒng)的數(shù)字對(duì)講機(jī)測試做了充分的研究。文章首先系統(tǒng)的介紹了DMR系統(tǒng)協(xié)議,包括協(xié)議的突發(fā)結(jié)構(gòu)、時(shí)隙結(jié)構(gòu)、幀結(jié)構(gòu)、信令、以及信道的接入和幀同步等協(xié)議的關(guān)鍵部分。然后比較詳細(xì)地分析了DMR系統(tǒng)數(shù)據(jù)鏈路層比較重要的語音幀和數(shù)據(jù)幀的組成和發(fā)送方式。文中重點(diǎn)介紹了DMR數(shù)字對(duì)講機(jī)測試時(shí)所用的兩大功能語音和數(shù)據(jù)。通過NIOS ii軟件用C語言編程的方法具體的實(shí)現(xiàn)了DMR數(shù)字對(duì)講機(jī)語音測試幀和數(shù)據(jù)測試幀以及對(duì)語音測試幀和數(shù)據(jù)測試幀的編解碼。最后對(duì)生成的測試幀在以FPGA為核心的硬件電路板上進(jìn)行了測試,并得出結(jié)論。通過測試幀的形成以及編碼和解碼為DMR數(shù)字對(duì)講機(jī)的測試提供了有效的信號(hào)源,為進(jìn)一步的測試DMR數(shù)字對(duì)講機(jī)提供了有力的保障。
[Abstract]:In recent years, with the continuous innovation of wireless communication technology and the gradual deepening of the application of walkie-talkie in the industry, the demand for wireless walkie-talkie is rising rapidly. Interphone plays a more and more important role in many special communication fields, such as railway transportation, ship communication, construction company, entertainment place, logistics transportation and public security system, so the research of interphone is becoming more and more important. With the increasing utilization rate of intercom, the limited frequency resources can not meet the increasing demand of broadcast and dedicated wireless users. The traditional analog communication walkie-talkie has low efficiency in spectrum utilization, and the function and application range of analog interphone become more and more limited, so with the rapid development of wireless communication system, People pay more and more attention to the scope and function of digital intercom. Interphone communication is gradually undergoing the transformation from analog interphone communication to digital interphone communication. The DMR protocol issued by the European Telecommunications Standards Association is a professional digital mobile communication standard. The protocol can make use of spectrum resources efficiently and can also be compatible with simulation conventions. Its business functions are rich, can be extended or backward compatible. At the same time, the system and terminal as well as the overall operation and maintenance cost is low, the network construction speed is faster. With the rapid development of digital interphone research, the test of digital interphone is becoming more and more important. Good testing technology can ensure the research and development of digital walkie-talkie efficiently and quickly, can quickly find the design error, provide guarantee for users' products, and at the same time, the quality of digital interphone has a good guarantee. This is of great significance to the mass production of digital intercom. Therefore, this paper focuses on the test of digital interphone based on DMR protocol, and hopes to be more helpful to the development and research of DMR digital interphone. According to the development status and development trend of digital interphone in DMR system at home and abroad, the digital interphone test of DMR system is fully studied in this paper. Firstly, this paper systematically introduces the DMR system protocol, including the burst structure, slot structure, frame structure, signaling, channel access and frame synchronization protocols. Then the composition and transmission mode of speech frame and data frame in data link layer of DMR system are analyzed in detail. This paper focuses on the two functional voice and data used in the test of DMR digital intercom. The speech test frame and data test frame of DMR digital intercom and the coding and decoding of speech test frame and data test frame are realized by NIOS ii software programming in C language. Finally, the generated test frame is tested on the hardware circuit board with FPGA as the core, and the conclusion is drawn. Through the formation of test frame, coding and decoding, it provides an effective signal source for the test of DMR digital interphone, and provides a powerful guarantee for the further test of DMR digital intercom.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN929.54

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