摘要
在采集大量过境民航飞机下行的实时ACARS报文信号的基础上,统计分析民航现行地空数据链信号特点,并结合ARINC-618协议定义的ACARS报文信号数据传输机制与编码特点,给出了符合ACARS报文信号特点的信号"预处理"方法,改善了输入报文译码单元的信号质量;提出基于二码元长度的实时ACARS信号分析算法,并完成了报文信号的译码。通过与现有ACARS译码设备对比,提出算法具有良好的报文译码性能。
The analysis of signal in air-ground datalink system which is nowadays widely used in Civil Aviation was done based on a number of real-time sample ACARS signals collecting form the planes in daily life. And an effective method of ＂pre-processing＂ according with the characteristic of ACARS signal was presented to improve the input quality of message decoding module, with data transmission and encoding characteristic of ACARS signal defined in ARINC-618 were considered; The analysis algorithm of real-time ACARS signal based on bis-code element was proposed in this article to accomplish the decoding of message signal. Compared with the existing ACARS decoding instrument, the algorithm presented in this article showed a good performance.
出处
《信息技术》
2012年第7期6-10,共5页
Information Technology
基金
国家自然科学基金(61079003
61179066)
