This amendment enhances the UWB PHYs with additional coding options and improvements to increase the integrity and accuracy of ranging measurements. It also enhances the MAC to support control of time-of-flight ranging procedures and exchange ranging related information between the participating ranging devices.

This amendment enhances the HRP and LRP UWB PHYs and associated ranging techniques. Areas of enhancement include additional coding and preamble options, improvements to existing modulations to increase the integrity and accuracy of the ranging measurements, and additional information element definitions to facilitate ranging information exchange. The amendment defines MAC changes to support these PHY enhancements. Typical range of the radio is up to 100 meters.