Appendix
Glossary
Explanations of some terms commonly seen in the UWB field:
| Abbreviation | Full term | Explanation |
|---|---|---|
| IEEE | Institute of Electrical and Electronics Engineers | The world's largest professional association for electrical, electronic and computing fields and related science and technology. Common standards such as Wi-Fi and Ethernet are defined by it. |
| ToF | Time of Flight | The time a signal takes to travel from one point to another. |
| LoS | Line of Sight | In a physical radio channel configuration, a direct line of sight exists between transmitter and receiver. |
| NLoS | Non Line of Sight | In a physical radio channel configuration, there is no direct line of sight between transmitter and receiver — for example, a wall in between. |
| RTLS | Real Time Location System | A system designed to provide real-time location information about various items. |
| TWR | Two Way Ranging | A ToF-based distance measurement method, computed from two-way communication between transmitter and receiver. |
| TDoA | Time Difference of Arrival | A method of deriving transmitter position information. It records the arrival times of transmissions at two physically different locations (whose clocks are synchronised); the difference in arrival times provides information about the transmitter's position. Multiple TDoA measurements at different locations can uniquely determine the transmitter's position. |
| PDoA | Phase Difference of Arrival | A method of determining the propagation direction of a radio wave arriving at an antenna array, from the phase difference of the signal received at each antenna array element. |