Design of Ultra High Speed Data Transmission Interface for Remote Sensing Satellite Based on Fiber Optic Interface

The data rate of high-resolution remote sensing satellites is constantly increasing, from the previous level of 100Mbps to the current level of over 100 Gbps.At present, the commonly used high-speed interfaces for satellites (such as LVDS, 2711, and CXP) cannot be tolerated in engineering, whether in terms of ground impact, cable size, or FPGA I/O pins. How to achieve high reliability and stable transmission of massive data on limited satellite platforms has become the key to the design of remote sensing satellite data transmission interfaces. Aiming at the problem that it is difficult to realize ultra-high data rate transmission in the current satellite common high-speed interface engineering, this paper proposes a design method of remote sensing satellite ultra-high speed data transmission interface based on optical fiber interface, selects the optical fiber interface suitable for the Satellite bus, and uses an efficient transceiver feedback mechanism to realize the highly reliable transmission of satellite optical fiber interface. At the same time, the advantages of optical fiber interface such as high speed, low power consumption, small size and long transmission distance are used, Compared to using commonly used high-speed interface methods, the cost is reduced by 60%, while the volume and weight are reduced by 80% and 70%, respectively. Through verification at a certain model identification level, high-speed serial data transmission of 400 Gbps on board was achieved. Engineering tests have shown the correctness and reliability of the interface design, laying the foundation for the on-orbit application of the model.