Wireless communication enables the transmission of data between two or more points without the use of wires or any other electrical conductor. Wireless technology is a modern networking technology that is both cost and time effective. It is characterized by the use of radio wave communication and signal processing. This technology is central to modern mobile technology and telecommunication industry and is undergoing rapid advancement. Some advanced models employ sound or electromagnetic radiations like light for short and long distance communication. This book is compiled to provide information about the key principles and techniques related to wireless communications. It aims to shed light on some of the unexplored aspects of this field and provide insights into the emerging applications in various other areas of science. Those who want to broaden their expanse of knowledge will find this book immensely helpful.