ABSTRACT
For in-room applications, we have plenty of line-of-sight conditions with strong direct path that invites precise time of arrival (TOA) positioning using ultra-wideband signals for applications such as electronic gaming to support centimeter precision positioning. Since measurement noise for TOA ranging is caused by thermal noise, it is very small and location estimate becomes very accurate. To measure the TOA, we use periodic signals, periodic pulses, or sinusoids. Any periodic signal used for measurement of the time has an ambiguity interval, which results in ambiguity in measurement of the distance. TOA-based systems also need to establish a time reference between the transmitter and the receiver to synchronize. For TOA-based ranging, we can use the phase of the carrier signal for narrowband ranging and delay of arrival of the waveform for wideband measurement of the distance between the transmitter and the receiver.
