Saif Saad Hameed, Performance Evaluation of Free Space, Journal of Engineering and Applied Sciences, Volume 14,Issue 12, 2019, Pages 4164-4166, ISSN 1816-949x, jeasci.2019.4164.4166, (https://makhillpublications.co/view-article.php?doi=jeasci.2019.4164.4166) Abstract: In this research, a designating and simulating of free-space-optical-communication is done using MATLAB simulating program, the simulation covers the QoS of the system while using different design and configurations by increasing or decreasing the distance. Keywords: Free-space-communication;LiFi;QoS;outdoor communication;last miles communications;configurations