Patent ID: 8576829
Filing Date: 2013-11-05
Classification: G01S,H04W

Abstract:
1. A wireless network comprising: a wireless unit which synchronously transmits messages in multiple channels using a transmit clock signal, the wireless unit starting transmission of the messages at intervals comprising of at least one of one or more periods of the transmit clock signal so that transmission of two of the messages is separated by a time interval of one or more periods of the transmit clock signal, wherein the wireless unit does not transmit during the time interval; a plurality of location receivers for receiving the messages in one of at least two different channels, said messages transmitted by the wireless unit within the wireless network and determining a time of arrival for the received messages; and at least one master unit for receiving the time of arrival from each of the location receivers to determine a location of the wireless unit based on the Time Difference Of Arrival (TDOA) of the transmitted messages at the location receivers.