Abstract:

For the characteristics such as data classes' variety, transmitting long distance, strong disturbed and strict real-time of the ground-based high resolution photoelectric imaging telescope communication, a communication software system based on field programmable gate arraywas built on the existed hardware platform. According to the telescope, the software system must have functionsas real-time signal processing based on fiber transmission, code and decode of data, synchronous memory, data fusion and transformation. Experiment indicates that the system can transfer 256 channels of RS422 and 256 transistor transistor logicsignals through fiber in one time, longest delay is 35μs; the system also can generate 7 synchronous signals, longest delay is less than 10μs; during the spatial and time information align, time delay is 10μs, spatial delay is 114μs. The whole communication software system has right logic, safe transmission, high real-time characteristic, fits the large ground-based high resolution photoelectric-imaging telescope well.

Key words: field programmable gate array, signal progress, digital communication system, fiber transmission