Institute of Optics and Electronics,Chinese Academy of Sciences
Aiming at the problem of poor real-time performance due to the time-consuming implementation of the star identification algorithm for the all-sky area in DSP.A star identification algorithm for All-Sky Regions based on FPGA in star radiation mode is proposed and implemented. This method takes advantage of the characteristics of FPGA parallelism and high main frequency, and solves the problem of long time-consuming star identification in the whole sky area under the premise of ensuring high precision and high accuracy of the algorithm. The main work of this paper includes: firstly, the star radiation pattern is constructed according to the star point information; secondly, the calculation of the corresponding eigenvectors in the star radiation pattern is realized based on FPGA; finally, a pre-readable and pipelined star radiation pattern matching algorithm is proposed, which greatly shortens the time of star radiation pattern matching. The experimental verification was carried out on the Xc7a75tfgg484-2 platform of Xilinx Company. The results showed that under the same main clock frequency, the speed of the star identification algorithm based on FPGA is more than 10.95 times faster than that based on DSP. And the recognition rate exceeds 99%.