1. Ke X (2016) Wireless optical communication, 1st edn. Science Press, Beijing
2. Majumdar AK (2015) Advanced free space optics. Springer, New York
3. Ke X (2004) Introduction to wireless laser communication, 1st edn. Beijing University of Posts and Telecommunications Press, Beijing
4. Ke X, Wu J (2019) The principle and application of wireless optical coherent communication, 1st edn. Science Press, Beijing
5. Ke X (2016) Partial coherent optical transmission theory in wireless optical communication, 1st edn. Science Press, Beijing