摘要
光网络在数据传输过程中易受到衰落信道的作用产生传输错误,为提高纠错能力,提出并设计一种改进的嵌入式光网络传输数据自动纠错系统,系统设计包括嵌入式光网络传输数据的纠错识别算法设计和系统硬件设计两部分,提取嵌入式光网络传输数据,采用时频分析方法对网络信号数据进行拟合,提取嵌入式光网络传输信号的频谱特征量,采用时间轴平移和伸缩方法进行嵌入式光网络传输数据的错误特征识别,根据特征差异性实现主动纠错。系统的硬件设计采用嵌入式总线设计方法,系统功能模块有上位机模块、下位机模块、总线模块、信号处理模块等部分,在ADSP21160处理器中完成系统的集成开发设计。测试结果表明,采用该系统能有效实现光网络传输数据自动纠错,纠错效率较高,准确性较好。
The network is vulnerable to fading channels in the process of data transmission,resulting in transmission errors. In order to improve the error correction ability,an improved embedded optical network transmission data automatic error correction system is proposed and designed. The system design includes two parts: the error correction recognition algorithm design of embedded optical network transmission data and the hardware design of the system. The embedded optical network transmission data is extracted and the time-frequency analysis method is used to fit the network signal data. The spectrum feature of the embedded optical network transmission signal is extracted,and the error feature identification of the embedded optical network transmission data is carried out by using the time-axis translation and scaling method,and the error correction is realized according to the difference of the characteristics. The hardware design of the system adopts the embedded bus design method. The system function module includes the upper computer module,the lower computer module,the bus module,the signal processing module and so on. The integrated development design of the system is completed in the ADSP21160 processor. The test results show that the system can effectively realize the automatic error correction of optical network transmission data,the error correction efficiency is higher and the accuracy is better.
作者
景文芳
JING Wenfang(Sichuan Technology and Business University,Chengdu 611745,China)
出处
《激光杂志》
北大核心
2020年第1期181-184,共4页
Laser Journal
基金
四川省教育厅(No.川教函[2017]33号)
关键词
嵌入式
光网络
传输数据
自动纠错
embedded
optical network
transmission data
automatic error correction
