Ground-to-air data link communication has the advantages of fast transmission rate, strong anti-interference ability, and large data communication volume and has been widely used in the field of civil aviation. This article mainly studies the measures to improve the real-time performance of the airborne data link communication system. The design of the hardware platform of the jamming environment simulator needs to comprehensively consider the implementation complexity of the jamming environment model and the real-time simulation method adopted by the UAV data link system. This paper uses the multicore and multithread in the Linux operating system to simulate the functions of the original data link communication system and uses the TFT screen to display the data communication process in the multicore and multithread design scheme. When evaluating and scoring the evaluation indicators, it must be carried out in accordance with certain standards. However, most of the indicators cannot be directly assessed quantitatively only through certain specific values. This article mainly uses the AHP method to analyze the weight of indicators. In the simulation, user information is generated by a random code generator and then distributed to each branch through serial-to-parallel conversion (S/P), and the spreading process is completed by long-code spreading on each branch, respectively, by BPSK. It is modulated on different carriers to form a transmission signal; the signal passes through a Gaussian white noise channel, and a certain frequency offset noise is added at the same time to reach the receiving end; the receiving end uses correlated demodulation, and after despreading, the error rate is counted. The data shows that under different distances, the frame loss rate of the data link is different. The frame loss rate in the 500 m range is about 1%, and the frame loss rate in the 2 km range is about 2.3%. The results show that the real-time performance of the data link communication system in this paper has been greatly improved.

中文翻译：

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提高机载数据链路通信系统的实时性能

地空数据链路通信具有传输速率快，抗干扰能力强，数据通信量大等优点，已广泛应用于民航领域。本文主要研究改善机载数据链路通信系统实时性能的措施。干扰环境模拟器的硬件平台的设计需要综合考虑干扰环境模型的实现复杂度和无人机数据链系统采用的实时仿真方法。本文使用Linux操作系统中的多核和多线程来模拟原始数据链接通信系统的功能，并使用TFT屏幕显示多核和多线程设计方案中的数据通信过程。在对评估指标进行评估和评分时，必须按照某些标准进行。但是，大多数指标不能仅通过某些特定值直接进行定量评估。本文主要采用层次分析法对指标权重进行分析。在仿真中，用户信息由随机代码生成器生成，然后通过串行到并行转换（S / P）分配到每个分支，并且扩展过程通过分别在每个分支上进行长代码扩展来完成BPSK。在不同的载波上进行调制以形成传输信号；信号通过高斯白噪声通道，同时加入一定的频偏噪声到达接收端。接收端使用相关解调，在解扩之后，错误率被计算。数据表明，在不同距离下，数据链路的丢帧率是不同的。500 m范围内的帧丢失率约为1％，2 km范围内的帧丢失率约为2.3％。结果表明，本文的数据链路通信系统的实时性能有了很大的提高。