Low-complexity, low power, yet robust UWB radios will be key players in short-range wireless applications such as health monitoring and body-area networks (BAN). These new applications require tetherless connectivity at data rates below 250 kbps, a range less than 10 m, and operational lifetime from a single battery charge for weeks or months. Constant-envelope Frequency Modulation UWB provides the solution. Due to its simple architecture and relaxed hardware specifications, FM-UWB radio is low cost and has low power consumption. ...