Abstract
The stochastic parallel gradient descent (SPGD) algorithm is a wave-front aberration correction algorithm which can directly optimize the performance metric of the system and can be applied to the channel of medium or strong turbulence. But due to slow convergence the algorithm can not fully meet the wave-front correction real-time requirements of satellite-to-ground laser communication links.Based on conventional SPGD algorithm this paper improves SPGD algorithm from two aspects: changing each iterative time and decreasing the overall iterative number. Simulation results show that algorithm convergence speed has been improved and the response speed of overall system has been improved significantly by using the improved method. Although the improved system will still delay for dynamic wave-front correction, overall speed has been very close to the ideal speed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.