高空间分辨率大视场遥感相机图像的高速高可靠传输系统研究

提出一种适于高空间分辨率大视场遥感相机的图 像高速高可靠传输系统。首先,分析了TLK2711的通信链路,提出 了基于同步控制字的高速串行传输策略；深入分析了噪声对传输可靠性的影响,进而提出(17,6)纠错编码算法,分析了纠错编码在大视场空间相机中应用的可行性； 最后,在某大视场TDICCD空间相 机样机上进行了系统测试。实验表明,本文系统可以实时传输80路高 量化数据,整个系统有 效数据吞吐率可达13.02Gbit/s；所 提出的(17,6)纠错编码算法纠错能力强,运算速度快,易于硬件 实现,每512Byte数据可纠正32bit的错误,提高了空间 相机高速串行传输的可靠性；系统在不同的传输速度下工作均表现出令人满意的效果。

A high-speed and high-reliability transmission system for the hig h resolution and large field TDICCD camera

A high speed and high reliability transmission system applicable to th e high resolution and large field time delay and integration charge-coupled dev ice (TDICCD) camera is proposed.First,this paper analyzes the communication link TLK2711and presents a high-speed serial transmission strategy based on synchronous control word.Then,the (17,6) error correction coding algorithm i s put forward on basis of the in-depth analysis of the impact of noise on the transmission reliability.The thought and correction theo ry of the proposed algorithm is explained and its feasibility of application for large field space camera is demonstrated. This algori thm is tested on a multi-spectral space camera and the results show that the system can achieve the transmission of 80route data with the effective data throughput of up to 13.02Gbit/s for the whole system.It is verified that the (17,6) error correction coding algori thm has the characteristics of strong correction ability,high calculation speed and easy implementation in hardware.It improves the reliabili ty of space camera high-speed serial transmission with the ability that each 512byte data can correct as many as 32bit errors.I n conclusion,the system has obtained satisfactory effect under different transmission speeds with good portability,which is able to meet the real-time,high-speed and reliable image transmission requirements for the high spatial resolution TDICCD camera wi th large field of view.