【摘要】：數(shù)字集群通信系統(tǒng)既具備個(gè)人通信的所有功能,也能控制與實(shí)現(xiàn)個(gè)人和群體之間的任意通訊,該系統(tǒng)具有較高的保密性和豐富的功能,實(shí)現(xiàn)了通信功能的智能化。本文所介紹的是一種數(shù)字集群系統(tǒng)終端設(shè)備數(shù)字對(duì)講機(jī)的設(shè)計(jì),該系統(tǒng)設(shè)計(jì)所依托的硬件環(huán)境是Microchip公司最新推出的dsPIC33F系列單片機(jī)以及與之相應(yīng)的Explorer 16開(kāi)發(fā)板,選取WM8510作為語(yǔ)音編解碼芯片。以C語(yǔ)言與匯編語(yǔ)言作為軟件開(kāi)發(fā)語(yǔ)言,確定了基于此基礎(chǔ)的數(shù)字對(duì)講機(jī)系統(tǒng)終端的設(shè)計(jì)方案。dsPIC33F系列單片機(jī)是一系列價(jià)格低廉而且性能優(yōu)異的單片機(jī)集合,片上實(shí)現(xiàn)了單片機(jī)控制能力和數(shù)字信號(hào)處理能力的無(wú)縫集成,非常適合本系統(tǒng)的開(kāi)發(fā)使用。與之相應(yīng)的Explorer 16開(kāi)發(fā)板,同樣是性能卓越而價(jià)格低廉的產(chǎn)品。選用這樣的硬件環(huán)境能夠在有效的數(shù)字對(duì)講功能的前提下大大降低其造價(jià)。數(shù)字對(duì)講機(jī)設(shè)計(jì)其首要目的就是為了降低的成本,以使得更多的人能夠享受專(zhuān)用移動(dòng)通信網(wǎng)。本文對(duì)數(shù)字對(duì)講機(jī)中使用到的各功能模塊的軟件進(jìn)行了設(shè)計(jì),對(duì)本課題所涉及到的數(shù)字對(duì)講機(jī)系統(tǒng)結(jié)構(gòu)、語(yǔ)音活動(dòng)檢測(cè)、語(yǔ)音傳輸過(guò)程進(jìn)行了設(shè)計(jì)與實(shí)現(xiàn)。采用G.711標(biāo)準(zhǔn)作為幀數(shù)據(jù)編解碼標(biāo)準(zhǔn),語(yǔ)音編碼采用A律PCM編碼方式實(shí)現(xiàn)。對(duì)整體的系統(tǒng)進(jìn)行了調(diào)試,通過(guò)試驗(yàn)驗(yàn)證,本系統(tǒng)語(yǔ)音傳輸質(zhì)量較高,能夠滿足一定規(guī)模的數(shù)字對(duì)講的需求。
[Abstract]:Digital trunking communication system not only has all the functions of personal communication, but also can control and realize any communication between individuals and groups. The system has high confidentiality and rich functions, and realizes the intelligentization of communication function. This paper introduces the design of digital interphone for terminal equipment of digital trunking system. The hardware environment of this system is the dsPIC33F series microcontroller and the corresponding Explorer 16 development board, which is newly introduced by Microchip Company. WM8510 is selected as the speech codec chip. Taking C language and assembly language as software development language, the design scheme of digital interphone system terminal based on this foundation is determined. DsPIC33F series single chip microcomputer is a series of low price and excellent performance single chip microcomputer collection. It realizes the seamless integration of single chip microcomputer control ability and digital signal processing ability, which is very suitable for the development and use of this system. Corresponding to the Explorer 16 development board, is also excellent performance and low-cost products. This hardware environment can greatly reduce its cost under the premise of effective digital intercom function. The primary purpose of digital interphone design is to reduce the cost so that more people can enjoy private mobile communication network. In this paper, the software of each function module used in the digital interphone is designed, and the structure of the digital interphone system, the voice activity detection and the speech transmission process are designed and implemented. G. 711 standard is adopted as frame data coding standard, and speech coding is realized by A law PCM coding method. The whole system is debugged and verified by experiments that the quality of voice transmission is high and can meet the demand of digital intercom on a certain scale.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TN929.54

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本文編號(hào)：2384362