Hybrid wirless tag based communication, system and applicaitons

A non-transitory computer readable medium that stores instructions that when executed by a first device cause the first device to execute the stages of:

• sending, by a first wireless transceiver of the first device and to a second wireless transceiver, (i) a first wideband message that consists essentially of a first synchronization preamble and (ii) a first narrowband message that comprises first ranging information and does not include the first synchronization preamble;
• receiving, by the first wireless transceiver and from the second wireless transceiver, (i) a second wideband message that consists essentially of a second synchronization preamble and (ii) a second narrowband message that comprises second ranging information and does not include the second synchronization preamble;
• and
• calculating, by the first device and based on portions of the first and second ranging information, a first estimate of the distance between the first wireless transceiver and the second wireless transceiver.

A wireless tag that comprises a first wireless transceiver and a processor;

• wherein the first wireless transceiver is configured to:
• send to the second wireless transceiver (i) a first wideband message that consists essentially of a first synchronization preamble and (ii) a first narrowband message that comprises first ranging information and does not include the first synchronization preamble;
• receive from the second wireless transceiver, (i) a second wideband message that consists essentially of a second synchronization preamble and (ii) a second narrowband message that comprises second ranging information and does not include the second synchronization preamble;
• and
• wherein the processor is configured to calculate, based on portions of the first and second ranging information, a first estimate of the distance between the first wireless transceiver and the second wireless transceiver.