If you start with a blank page to design a short range wireless protocol that minimizes power consumption and latency and maximizes data rate, you would probably go through this thought process: First, minimize the time the transmitter and the receiver are powered on. Second, ensure that the transmitter and receiver can be started and shutdown as quickly as possible. This is the approach SPARK Microsystems has taken for its UWB transceivers.
SPARK UWB Makes History in Industry’s First UWB Powered Consumer Audio Devices