The transfer of signals between two or more points that are not connected by wires or cables is known as wireless communications. It is also known as over the air communication. It focuses on transmitting information through some form of energy. This form of communication can be achieved through radio, sonic, free space optical and electromagnetic induction. This field can be used to transfer information over to short distances using Bluetooth and even to longer distances using deep space radio communications. Some examples of equipment's that use this technology are global positioning system units, wireless headsets and headphones, cordless telephones, radio navigation, satellite navigation etc. This book elucidates the concepts and innovative models around prospective developments with respect to this field. While understanding the long-term perspectives of the topics, the book makes an effort in highlighting their impact as a modern tool for the growth of the discipline. As this field is emerging at a rapid pace, the contents of this book will help the readers understand the modern concepts and applications of wireless communication.