Capture performance analysis of beacon-less laser communication use dual beam scanning

Satellite laser communication has been world wide studied for the advantages of high communication rate, light-weight terminal and good beam pointing performance. With the increased demand for satellite laser communication networking, it's necessary to improve the capture performance of the terminal. In this paper, the beacon-less dual beam capture method is proposed. Comparative analysis was conducted on scanning time and coverage rate between single and double beam (DBS) uncertain areas scanning. The simulation results shown that dual beam scanning can shorten the capture time by at least half, and the improvement effect becomes more significant with the increase of uncertain field (UF), and with the increase of UF, the effect becomes more pronounced. Furthermore, when the uncertainty region is relatively smaller, the resistance of DBS to vibration is better than that of SBS, but this performance will decrease with the increase of UF.