【摘要】：目前,我國(guó)的無線通信網(wǎng)絡(luò)系統(tǒng)分為公網(wǎng)和專網(wǎng)兩種。專網(wǎng)與公網(wǎng)有著不同的市場(chǎng)定位,也是公網(wǎng)通信無法替代的一個(gè)領(lǐng)域。專網(wǎng)通信系統(tǒng)的主要代表就是對(duì)講機(jī)通信系統(tǒng)�，F(xiàn)在市場(chǎng)上的數(shù)字對(duì)講機(jī)由于成本昂貴導(dǎo)致最終的價(jià)格居高不下,使得我國(guó)數(shù)字對(duì)講機(jī)領(lǐng)域的市場(chǎng)發(fā)展還是有一大段路要走。本文的主要研究?jī)?nèi)容是設(shè)計(jì)與實(shí)現(xiàn)滿足dPMR通信協(xié)議的數(shù)字專網(wǎng)無線通信系統(tǒng)軟件平臺(tái),旨在設(shè)計(jì)一套自定義的軟件系統(tǒng),而不使用現(xiàn)有的通用操作系統(tǒng),以降低數(shù)字對(duì)講機(jī)設(shè)計(jì)的成本。首先給出了該系統(tǒng)設(shè)計(jì)的整體框架和流程,然后針對(duì)性地分不同模塊進(jìn)行詳細(xì)分析,包括協(xié)議棧、鍵盤屏幕模塊、音頻和射頻模塊的設(shè)計(jì)與各模塊之間的聯(lián)系。協(xié)議棧從物理層、數(shù)據(jù)鏈路層和呼叫控制層的功能進(jìn)行分層實(shí)現(xiàn),重點(diǎn)進(jìn)行了時(shí)鐘提取算法的實(shí)現(xiàn)以及狀態(tài)機(jī)跳轉(zhuǎn)和呼叫控制流程的設(shè)計(jì)。鍵盤屏幕模塊主要進(jìn)行屏幕顯示、鍵盤指令解析與處理的功能實(shí)現(xiàn)。音頻模塊主要進(jìn)行語音采集播放以及數(shù)據(jù)傳輸?shù)膶?shí)現(xiàn)以及聲碼器的編解碼過程實(shí)現(xiàn),并說明音頻驅(qū)動(dòng)與協(xié)議棧之間的調(diào)用關(guān)系。然后射頻模塊進(jìn)行數(shù)據(jù)發(fā)射接收的設(shè)計(jì)實(shí)現(xiàn)。最后進(jìn)行對(duì)講機(jī)功能的進(jìn)一步完善設(shè)計(jì),包括模擬數(shù)字雙模式處理流程的設(shè)計(jì),在休眠模式下省電處理流程的設(shè)計(jì),以及工程模式的功能實(shí)現(xiàn)。本文的創(chuàng)新點(diǎn)在于整個(gè)軟件系統(tǒng)相當(dāng)于一個(gè)自定義的操作系統(tǒng),系統(tǒng)中各模塊都是分別設(shè)計(jì)實(shí)現(xiàn)的,根據(jù)模塊間的相互聯(lián)系進(jìn)行調(diào)用,而不使用現(xiàn)有的通用集成系統(tǒng),降低了數(shù)字對(duì)講機(jī)設(shè)計(jì)的成本。經(jīng)驗(yàn)證,本系統(tǒng)實(shí)現(xiàn)了對(duì)講機(jī)終端之間的點(diǎn)對(duì)點(diǎn)通信傳輸功能。
[Abstract]:At present, the wireless communication network system is divided into public network and private network. Private network and public network have different market positioning, but also public network communication can not be replaced by a field. The main representative of the private network communication system is the interphone communication system. Due to the high cost of the digital interphone in the market, the final price remains high, so there is still a long way to go for the development of the market in the field of digital interphone in China. The main research content of this paper is to design and implement the digital private network wireless communication system software platform which meets the dPMR communication protocol. The purpose of this paper is to design a set of self-defined software system without using the existing general operating system. To reduce the cost of digital interphone design. Firstly, the whole frame and flow of the system design are given, and then analyzed in detail according to different modules, including protocol stack, keyboard screen module, audio and radio frequency module design and the relationship between each module. The protocol stack is implemented hierarchically from the functions of physical layer, data link layer and call control layer, with emphasis on the implementation of clock extraction algorithm and the design of state machine jump and call control flow. The keyboard screen module mainly carries on the screen display, the keyboard instruction analysis and the processing function realization. Audio module is mainly used to realize voice acquisition and play, data transmission and codec of vocoder, and explain the relation between audio driver and protocol stack. Then the RF module is designed and realized. Finally, the further improvement design of the interphone function is carried out, including the design of the analog and digital dual mode processing flow, the design of the power saving processing process under the dormancy mode, and the realization of the function of the engineering mode. The innovation of this paper lies in the fact that the whole software system is equivalent to a custom operating system, and each module in the system is designed and implemented separately. The cost of designing digital interphone is reduced. It is verified that the system realizes the function of point-to-point communication between interphone terminals.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TN92;TP311.52

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本文編號(hào)：2350521