短波选频与建链系统数据传输协议设计与实现

发布时间：2018-05-04 13:42

本文选题：短波通信 + 数据传输协议　；参考：《西安电子科技大学》2015年硕士论文

【摘要】：短波通信的抗摧毁性,是其他通信方式难以相比的,这使得它在军事通信以及应急通信方面有着不可取代的地位。近几年来,在新技术的促进下,短波通信得到了快速发展。在第二代短波通信系统的基础上,实验室开展了对第三代短波选频与建链系统的研究,以提高建链速度和数传效率。本文主要研究该系统的数据传输部分,所做的工作主要如下:1.分析了系统总体方案,给出了链路层的数据传输协议,主要包括TM协议和HDL协议。设计了各个协议的帧格式及协议单元的内容,给出了各个协议单元内容的表示意义和作用。2.在实现小文件传输的基础上,深入研究网口、串口收发数据过程,定时器超时机制以及数传中的缓冲区循环操作、差错控制技术、滑动窗口机制、自适应变速机制,最终完成了大文件的传输。还完成了断点续传功能,使程序在传输中断后又重新建链时,能够准确找到中断位置,继续完成整个文件的传输。3.对数据传输模块做了功能测试和性能测试,并对测试数据进行了分析。首先是模拟测试,即两个ARM板直连,信道模拟程序插入到发送端,通过设置不同的误码率和捕获率,模拟各种信道条件,实现对数传模块的测试;然后是室内联调,即在室内连接所有硬件设备,进行联合调试、测试,大量测试不同文件的传输情况。对测试数据进行了整理分析,结果表明,数传模块能够正确传输各种文件,测试结果与设计的预期结果是一致的。
[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.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN925

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