摘要
水文自动测报系统的特点是通信速率低,应用环境的信噪比不高。因此采用了数据帧重发3遍的纠错编码方案,此方案编码增益的理论值可达3.38dB.实现译码的方法有多种,文中提出了一种实用的纠错译码方法——“窗口滑动”法,并编制了完成纠错译码功能的单片机软件。实测结果表明采用单片机软件纠错译码后,信噪比可提高1.
The characteristics of a hysrology automatic telemetering system are low data rate and low S/N.Therefore,the data frame is transmitted repeatedly three times for error correcting decoding.The decoding gain is 3.38 dB in theory.“Slipping window” presented on errorcorrecting decoding is discussed and realized by one chip microcomputer software.By applying the method of “Slipping window”,S/N could be enhanced 1.2dB.
出处
《桂林电子工业学院学报》
1996年第4期22-26,共5页
Journal of Guilin Institute of Electronic Technology
关键词
纠错编码
单片机
软件
通信
信道
slipping window,error correcting codes,one chop microcomputer software,coding gain