Research Of Astronautic Digital Camera High-speed Data Transmission Technology

With the application of Elector-optical camera and high-speed processor in weather satellite, landsat, space aero flight and space shuttle, DPS (Data Processing System) needs high credibility, high-speed data transmission technology to solve the high-speed graph transmission of astronautic digital camera.In electrical design field Programmable Logic Device is used abroad which is high dependability, high-speed and low-power consumption. The revolutionary progress is brought by the digital system. In our country this technology is elementary step, but we pay attention to this technology.In this text I discuss the high-speed data transmission of the high-speed data processor. Fist, I expatiate the expandable trend of the high-speed data transmission. And explain when the output data and input data from the CMOS chip is increased, the hard problem between the CMOS chip and the chip is done. An analysis of multiple parallel data transmission with a high transfer rate of Serial Bus interface architecture is presented. It is confirmed that the characteristics of serial data transmission is bound to become a mainstream technology in the future.This was followed by high-speed interface for the definition of the concept, discusses the high-speed serial data transmission difficulties and bottlenecks in the existing physical device that gives high-speed serial data transmission in the physical nature of change and instability in the serial data. High-speed transmission in the current issue of impedance matching of the analysis is given the high-speed transmission of several transmission line models. Compared to low-speed circuits, high-speed circuit design focuses on passive components, including connections, circuit boards, packaging and so on. High-speed circuit design of these passive components affects the signal transmission (reflection, overshoot, ringing), the interaction between the signal (crosstalk) and the natural world and the role of the (electromagnetic interference). High data transmission in the transmission line impedance matching the accuracy of the data is an important prerequisite for further high-speed data transmission in the end the source of resistance to match the theoretical data were analyzed. On this basis, given the high-speed data transmission of several transmission line model.Finally, in response to the current FPGA development platforms, design methods, language and embedded in the history of the development of a detailed description and discussion of the use of programmable logic device used to create the need for specialized communications chips. In the article details the RocketIO features, RocketIO reference clock, the physical layer of 8B/10B encoding, high-speed PCB design elements and so on give the diagram of the experimental system. In the stability of demanding projects, such applications have accurate high-speed serial communications capabilities need to FPGA. True to the high-speed data transmission serial bus physical layer design of a detailed analysis to arrive at the high-speed transmission system to meet the requirements of the project, and high-speed data transmission serial bus physical layer has been designed. High-speed serial bus interface technology because of the clock and data transmission for the merger in order to overcome the clock and data jitter problems that can greatly increase the transmission rate and reduce the external IC pin count, lower power consumption and better signal integrity. In order to solve the space remote sensor access to a large number of high-speed image data transmission problems, in-depth articles on space remote sensing devices for high-speed data transmission of the design process and application of Xilinx Inc., in its Virtex-ⅡPro Series FPGA introduced in the RocketIO transceiver hardware Nuclear, on the design of key technologies for the use of the RocketIO a detailed description and analysis. A detailed analysis of spacecraft data integration framework is for digital cameras. Details of the data integration framework make the deal more than a single structure and framework. We deal with the analysis of the difference. A description of the space camera digital camera is presented space data integration framework. Space made digital cameras to send and receive data from the closed-loop theory. Modelsim in the simulation software has been the basis of the next space digital cameras to send and receive data from the closed-loop simulation results. Based on Virtex-ⅡPro's RocketIO transceivers for high-speed digital camera space image data optical fiber transmission system has greatly reduced the difficulty of designing high-speed serial data and image transmission in the course of the bit error rate. The accuracy of the data is an important prerequisite for further high-speed data transmission in the end the source of resistance to match the theoretical data were analyzed. On this basis, I presented the high-speed data transmission of several transmission line models.On the basis of above traits a simple circuit, high-speed, work well, high reliability design is presented. It completely fits the digital camera which is used on high-speed optical fiber transmission system. However, this design is still in its early stage. The kind of data transmission errors can not be corrected. With the exception of optical transmission protocols it does not have a specific transport protocol. It needs to be further improved to fit the image data optical fiber transmission system of astronautic high-speed digital camera.