Design And Implement Of Airborne SAR Communication And Control Card

SAR is a kind of imaging radar, which can acquire high resolution in both range and azimuth direction. It can greatly enhance the ability of information acquirement for its all time and all weather character, so it is widely used in the fields of global remote sensing, ocean research and resource exploration. To meet the needs of image data's real-time transfer, and real-time control, a communication and control card is introduced in this dissertation, which build a high performance and high reliability platform for image data transform and system control.Airborne SAR image data, with the character of large capacity and high data rate, when it is transmitted directly to the telemetry system, will bring great pressure to the transmission channel. After the communication and control card compresses the image data, the data capacity will reduce in large scale, but it requires high performance processor in the system to process image data. Besides, on the process of imaging, motion compensation is needed. But all sorts of parameter measurement devices and radar system devices transmit data by serial port, which will bring big pressure to the communication system.This dissertation is mainly related to the design and implementation of the communication and control card. Firstly, ADI company's high performance DSP ADSP TS201S is used in the design to improve the system's processing performence. Two DSPs which form a parallel system are used to make the system faster. Secondly, to solve the problem of the communication bottleneck between low-speed UART and high speed processors, SC16C554 is used in the design and its FIFO operation mode support a good way to solve this problem. Besides, the card's driver and hot swap function is developed in this essay, a power management way is bring forward in the end of the essay. After testing and debugging the whole system, the results demonstrate that the card is efficient and reliable.