本文選題：短波 + TI-TM4C129　； 參考：《西安電子科技大學(xué)》2014年碩士論文

【摘要】：在現(xiàn)代通信技術(shù)日新月異的背景下,結(jié)合第三代短波通信技術(shù)和現(xiàn)有的短波收發(fā)設(shè)備,實驗室展開了短波自動選頻與建鏈系統(tǒng)研究。課題初始,實驗室選取了基于ATSAM9263型ARM單元板和WinCE嵌入式操作系統(tǒng)結(jié)合的短波通信控制板設(shè)計方案,但在項目的進行中,發(fā)現(xiàn)WinCE系統(tǒng)內(nèi)核的實時性不滿足本項目的要求。新的設(shè)計方案選取了新的ARM單元板,并摒棄了WinCE操作系統(tǒng),采用裸機的方式進行開發(fā)。本文從通信控制板底層接口、協(xié)議和控制軟件的設(shè)計展開,作者主要的工作和成果概述如下：1.根據(jù)系統(tǒng)需求,確定了ARM平臺下采用裸機形式開發(fā)的短波通信控制板設(shè)計方案。分析了原有的基于WinCE系統(tǒng)的短波通信控制板的不足,由于通信系統(tǒng)采用同步的建鏈方式,對站點間時間的同步性要求比較高,經(jīng)測試,WinCE系統(tǒng)并不能很好的支持系統(tǒng)完成建鏈工作。鑒于此,本文提出了基于TI-TM4C129型ARM芯片的短波通信控制板設(shè)計方案,采用裸機的形式進行開發(fā),新的開發(fā)方式可以很好的滿足協(xié)議對實時性的要求。2.設(shè)計并實現(xiàn)了通信控制板上各外設(shè)的接口軟件。根據(jù)系統(tǒng)的功能需求,在裸機工作方式下,設(shè)計并實現(xiàn)了通信控制板相關(guān)外設(shè)的接口軟件。系統(tǒng)涉及到的外設(shè)主要包括通用定時器、串口、以太網(wǎng)和RTC實時時鐘,其中,通用定時器為建鏈協(xié)議的狀態(tài)跳轉(zhuǎn)提供定時功能,控制板與Modern、收發(fā)信機以及GPS模塊等采用串口進行數(shù)據(jù)交互,與用戶終端采用以太網(wǎng)進行數(shù)據(jù)交互,而RTC實時時鐘模塊為同步的建鏈協(xié)議提供時間基準。這些模塊是系統(tǒng)協(xié)議和控制軟件運行的基礎(chǔ)。3.設(shè)計了基于TI-TM4C129的通信控制板軟件的總體架構(gòu),實現(xiàn)了通信控制板與系統(tǒng)其它模塊的接口軟件,實現(xiàn)了基于短波3G-ALE技術(shù)的通信控制協(xié)議。系統(tǒng)其它模塊主要包括Modem、收發(fā)信機和系統(tǒng)終端,通信控制板和各個模塊之間都有相應(yīng)的接口協(xié)議,通信控制板通過對各個模塊發(fā)送不同的命令使其完成相應(yīng)的功能。系統(tǒng)的通信控制協(xié)議主要包括建鏈協(xié)議、鏈路質(zhì)量分析(LQA)協(xié)議和更頻協(xié)議。建鏈協(xié)議完成系統(tǒng)在不同狀態(tài)下的鏈路建立,LQA協(xié)議可以對系統(tǒng)工作頻段的鏈路質(zhì)量情況進行實時分析,更頻協(xié)議負責(zé)系統(tǒng)在信道條件惡化時在新選取的頻率組上重新建立鏈接,它們協(xié)作完成通信鏈路的建立和維護。4.結(jié)合實驗室研發(fā)的短波綜合模擬設(shè)備,搭建了系統(tǒng)的測試平臺,在室內(nèi)測試條件下,給出了系統(tǒng)各個功能模塊的測試結(jié)果。測試結(jié)果表明通信控制板的各通信控制協(xié)議均工作正常、和各模塊的接口軟件工作正常,相關(guān)外設(shè)的接口軟件也很好的完成了對通信控制協(xié)議的支持,最后分析驗證了軟件設(shè)計的正確性。
[Abstract]:Under the background of the rapid development of modern communication technology, combined with the third generation shortwave communication technology and the existing shortwave transceiver equipment, the laboratory has carried out the research of shortwave automatic frequency selection and chain building system. At the beginning of the project, the design scheme of shortwave communication control board based on ATSAM9263 arm unit board and wince embedded operating system was selected. However, in the course of the project, it was found that the real-time performance of wince system kernel could not meet the requirements of the project. The new design scheme selects the new arm unit board, and abandons wince operating system, and adopts the naked machine way to develop. This paper starts with the design of communication control board interface, protocol and control software. The author's main work and achievements are summarized as follows: 1. According to the requirement of the system, the design scheme of shortwave communication control board based on arm platform is determined. The shortage of the original shortwave communication control board based on wince system is analyzed. Because the communication system adopts synchronous chain building mode, the synchronization of time between stations is very high. After testing wince system can not support the system to complete the chain building work. In view of this, this paper proposes a design scheme of shortwave communication control board based on TI-TM4C129 arm chip, which is developed in the form of bare machine. The new development method can meet the real-time requirements of the protocol very well. The interface software of each peripheral device on the communication control board is designed and implemented. According to the function requirement of the system, the interface software of the communication control board is designed and implemented under the bare machine working mode. The peripheral equipment involved in the system mainly includes general timer, serial port, Ethernet and RTC real-time clock, in which universal timer provides timing function for state jump of build chain protocol. The control board interacts with modern transceiver and GPS module using serial port and Ethernet with user terminal while RTC real-time clock module provides time reference for synchronous chain building protocol. These modules are the basis of system protocol and control software operation. The overall architecture of communication control board software based on TI-TM4C129 is designed. The interface software between communication control board and other modules of the system is realized, and the communication control protocol based on shortwave 3G-ALE technology is realized. Other modules of the system mainly include Modem, transceiver and system terminal, communication control board and each module have the corresponding interface protocol, the communication control board by sending different commands to each module to complete the corresponding functions. The communication control protocols include chain building protocol, link quality analysis (LQA) protocol and more frequency protocol. Chain building protocol completes the link establishment in different states of the system. The LQA protocol can real-time analyze the link quality in the operating frequency band of the system, and the more frequent protocol is responsible for re-establishing the link on the newly selected frequency group when the channel condition deteriorates. They cooperate in the establishment and maintenance of communication links. Combined with the short-wave synthetic simulation equipment developed by the laboratory, the test platform of the system is set up, and the test results of each function module of the system are given under the condition of indoor test. The test results show that each communication control protocol of the communication control board works normally, and the interface software of each module works normally, and the interface software of the related peripheral equipment also completes the support of the communication control protocol very well. Finally, the correctness of the software design is verified.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN925

【相似文獻】

相關(guān)期刊論文 前10條

1 馬滿倉;楊杰;;短波通信中的正交頻分復(fù)用技術(shù)分析及應(yīng)用[J];軍民兩用技術(shù)與產(chǎn)品;2006年10期

2 葛俊峰;呼和滿都拉;;影響短波通信的主要因素[J];集寧師專學(xué)報;2007年04期

3 崔海歐;;短波通信損耗分析及通信頻點預(yù)測[J];中國電子科學(xué)研究院學(xué)報;2008年04期

4 王睿;張海勇;楊曦;阮e，

本文編號：2058205