This book presents some of the recent developments in the field of optical-wireless coherence communication. The factors affecting the coherence detection sensitivity are analyzed and the approach to approximate the coherence detection limit is discussed. The wavefront distortion caused by atmospheric turbulence is analyzed, and the influence of the wavefront distortion on the coherence detection performance is examined. A new concept of vortex-beam coherence-detection is proposed, and the problem of signal light decomposition into partially coherent light detection is analyzed. This book can benefit researchers, engineers, and graduate students in the field of telecommunications. It is suitable for engineering and technical personnel engaged in applied optics and communications engineering, university teachers, graduate students, and senior undergraduates.

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Xizheng Ke, Doctor of Science, second-level professor, head of the discipline of information and communication systems of Xi'an University of Technology, and deputy director of the Key Laboratory of Military-civilian Joint Construction of Intelligent Cooperative Networks in Shaanxi Province. Famous teacher in Shaanxi Province, Fellow of Chinese Institute of Electronics, Director of Chinese Optical Engineering Society, Executive Director of Shaanxi Optical Society. He received a bachelor's degree from Shaanxi Institute of Technology in 1983 and a doctor of science degree from the University of Chinese Academy of Sciences in 1996. From 1997 to 2002, he conducted post-doctoral research at Xidian University and the Second Artillery Engineering College. Dr. Xizheng Ke is a member of editorial board of "Journal of Electronics", "Infrared and Laser Engineering", "Journal of Electronic Measurement and Instrument", "Laser Technology", "Applied Optics", "Journal of Xi'an University of Technology", "Journal of Time and Frequency" and "Journal of Atmospheric Science Research". He is the national science and technology award review expert, and a member of the disciplinary review group of the Shaanxi Academic Degrees Committee. In 2000, Dr. Xizheng Ke won the Outstanding Young Scholar Award of the Chinese Academy of Sciences. In 2009, he was awarded the title of "Excellent Science and Technology Commissioner of Guangdong Province by the Ministry of Science and Technology". In 2015, he was awarded the title of "A Golden Phoenix on Green Poplar" in Yangzhou City. In 2018, he won the China Industry-University-Research Innovation Award, and in 2019 he won the China Industry-University-Research Innovation Achievement Award. Since 2001, he has won 16 provincial andministerial science and technology awards, including 1 first prize and 5 second prizes. He has obtained more than 20 nationally authorized invention patents, published 9 monographs in Science Press, and published more than 400 academic papers in domestic and foreign journals. More than 30 PhD. candidates have been cultivated in his direction.

Ke Chenghu,doctor,associate professor ,Director and principal investigator of Academician Workstation for Optical Wireless Communication Theory and Networking Technology of Xi'an at Xi'an university. He received his B.Sc. degree and M.Sc. Degree both from XiDian University in 2006 and 2011, Ph.D. degree from Xi'an University of Technology in 2020. His main research interests include wireless optical communication theory, channel noise model and coordinated control of smart microgrid wireless networks.