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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(17,16)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(17,16)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 reliable image transmission system suitable for large field of view remote sensing camera with high spatial resolution is proposed. Firstly, the communication link of TLK2711 is analyzed and a high speed serial transmission strategy based on synchronous control words is proposed. The influence of noise on transmission reliability is deeply analyzed. Then the (17,16) error correction coding algorithm is proposed and the error correction The feasibility of encoding in a large field of view space camera; finally, the system test was performed on a large field TDICCD space camera prototype. Experiments show that this system can transmit 80 channels of real-time high-quality data in real time, and the throughput of the whole system can reach 13.02Gbit / s. The proposed algorithm of error correction (17,16) has strong error correction capability, fast operation and easy hardware Realization, each 512Byte data can correct 32bit error, improve the space camera high-speed serial transmission reliability; the system at different transmission speeds have shown satisfactory results.