本文選題：短波通信 + 數(shù)據(jù)傳輸協(xié)議��； 參考：《西安電子科技大學(xué)》2015年碩士論文

【摘要】：短波通信的抗摧毀性,是其他通信方式難以相比的,這使得它在軍事通信以及應(yīng)急通信方面有著不可取代的地位。近幾年來,在新技術(shù)的促進下,短波通信得到了快速發(fā)展。在第二代短波通信系統(tǒng)的基礎(chǔ)上,實驗室開展了對第三代短波選頻與建鏈系統(tǒng)的研究,以提高建鏈速度和數(shù)傳效率。本文主要研究該系統(tǒng)的數(shù)據(jù)傳輸部分,所做的工作主要如下:1.分析了系統(tǒng)總體方案,給出了鏈路層的數(shù)據(jù)傳輸協(xié)議,主要包括TM協(xié)議和HDL協(xié)議。設(shè)計了各個協(xié)議的幀格式及協(xié)議單元的內(nèi)容,給出了各個協(xié)議單元內(nèi)容的表示意義和作用。2.在實現(xiàn)小文件傳輸?shù)幕A(chǔ)上,深入研究網(wǎng)口、串口收發(fā)數(shù)據(jù)過程,定時器超時機制以及數(shù)傳中的緩沖區(qū)循環(huán)操作、差錯控制技術(shù)、滑動窗口機制、自適應(yīng)變速機制,最終完成了大文件的傳輸。還完成了斷點續(xù)傳功能,使程序在傳輸中斷后又重新建鏈時,能夠準(zhǔn)確找到中斷位置,繼續(xù)完成整個文件的傳輸。3.對數(shù)據(jù)傳輸模塊做了功能測試和性能測試,并對測試數(shù)據(jù)進行了分析。首先是模擬測試,即兩個ARM板直連,信道模擬程序插入到發(fā)送端,通過設(shè)置不同的誤碼率和捕獲率,模擬各種信道條件,實現(xiàn)對數(shù)傳模塊的測試;然后是室內(nèi)聯(lián)調(diào),即在室內(nèi)連接所有硬件設(shè)備,進行聯(lián)合調(diào)試、測試,大量測試不同文件的傳輸情況。對測試數(shù)據(jù)進行了整理分析,結(jié)果表明,數(shù)傳模塊能夠正確傳輸各種文件,測試結(jié)果與設(shè)計的預(yù)期結(jié)果是一致的。
[Abstract]:Compared with other communication methods, shortwave communication has an irreplaceable position in military communication and emergency communication. In recent years, with the promotion of new technology, shortwave communication has been developed rapidly. On the basis of the second generation shortwave communication system, the third generation shortwave frequency selection and chain building system is studied in order to improve the speed of chain building and the efficiency of data transmission. This paper mainly studies the data transmission part of the system, the main work done is as follows: 1. The overall scheme of the system is analyzed, and the link layer data transmission protocol is presented, including TM protocol and HDL protocol. The frame format of each protocol and the content of protocol unit are designed. On the basis of realizing small file transmission, this paper deeply studies the process of receiving and sending data in network interface, serial port, timer timeout mechanism, buffer cycle operation in data transmission, error control technology, sliding window mechanism, adaptive speed changing mechanism, etc. Finally, the transfer of large files was completed. The function of continuous transmission of breakpoint is also completed so that the program can find the interrupt position accurately and continue to complete the transmission of the whole file. 3 when the program rebuilds the chain after the transmission interrupt. The function and performance of the data transmission module are tested, and the test data are analyzed. First, it is simulated test, that is, two ARM boards are connected directly, the channel simulation program is inserted into the transmitter, by setting different bit error rate and capture rate, simulating various channel conditions to realize the test of the data transmission module. That is, connecting all the hardware equipment in the room, debugging, testing, and testing the transmission of different files. The test data are analyzed, and the results show that the data transmission module can transfer all kinds of files correctly, and the test results are consistent with the expected results of the design.
【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】：2015
【分類號】：TN925

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