摘要
为了提高空间CCD相机中数字视频图像信息的传输带宽,增强图像传输抗电磁干扰能力并提高光纤链路的整体性能,开发了应用于大视场空间相机的数字视频图像信息高可靠光纤传输系统。首先,根据CCD成像单元特点和相机在轨工作环境得出了传输系统的输入速率,在此基础上并结合CCD视频处理结构设计并实现了9通道CCD图像数据光纤并行传输系统。然后,阐述了系统设计思想,并说明了高速串化器和光模块的设计理念。接着,提出了(16,8)纠错编码算法,阐述了该算法思想和实现电路。最后,在XX-X空间多光谱相机样机的传输系统上进行了试验验证。实验结果表明:该传输系统图像传输正确、工作稳定、可靠性高、实时强、无误码,单路有效数据率达到2.44Gbit/s。(16,8)纠错编码算法纠错能力强、易于硬件实现、占用资源少。纠错算法在3043Byte内可以纠正191bit错误。该传输系统满足了空间相机图像传输的要求。
In order to improve the transmission bandwidth of digital image, the performance of fiber link, and the anti-inter-ference ability of electromagnetic, a high speed optical fiber Transmission system for CCD image was designed in space CCD camera with a large field of view. First, the input rate was gained according to the characteristics of CCD imaging unit and the working environment of space camera in orbit, based on which, a 9-channel parallel high speed optical fiber transmission system for multi-channel CCD image was designed. Then, we expounded the system design idea and the principle of high speed serializer and optical module. Then, an error correction algorithm was proposed. And implementation method using very large scale integration （VLSI） was explained for the encoder. Finally, the experiments were performed for transmission system of the prototype in XX-X space multi-spectral camera. The results showed that the transmission system has a high reliability. The correcting algorithm has the characteristics of strong error detecting ability, less resource occupation and easier to be realized with hard-ware. The method is able to correcting 191 bit errors in 3043 Byte and meets the reliability of image Optical fiber transmission in space camera.
出处
《遥感学报》
EI
CSCD
北大核心
2012年第5期909-927,共19页
NATIONAL REMOTE SENSING BULLETIN
基金
国家高技术研究发展计划(863计划)(编号:863-2-5-1-13B)~~
关键词
空间相机
光纤传输
高速串化器
光模块
(16
8)纠错算法
编码电路
space camera, optical fiber transmission, high speed serializer, optical module, （16,8） encode algorithm, Coding circuit
