This book gives a complete picture about properties of UWB signal and its advantages and disadvantages, generation of the UWB pulse using various techniques, Modulation scheme, Test bed, applications, UWB regulations,various modulation and demodulation scheme that are relevant to UWB technology and its various applications concerning different fields. How UWB is far better than RFID and difference between active and passive RFID and its communication protocol, message format. probability of error and also it gives clear idea about in which situation which modulation is suitable. By using future testbed concept, smaller size UWB chip will be designed and used in various application efficiently. Application gives clear idea about how to take advantage of various properties.