Timeline for Is it possible to calculate the Time of Flight between two Bluetooth devices?
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 19, 2018 at 11:09 | vote | accept | jorrebor | ||
| Jun 12, 2017 at 19:39 | comment | added | Chris Stratton | @duskwuff there are definitely challenges which would require a very different system design, but wavelength is not the issue. GPS signals have wavelengths of ~19 and ~24 cm (ie, both are at lower frequencies than 2.4 GHz) but despite that local resolution of a few millimeters is possible via differential techniques. | |
| Jun 12, 2017 at 19:36 | comment | added | Jack B | It doesn't change anything. Meter-accuracy may be possible, 10cm will not be. A custom radio time of flight system could probably do what you want, but it will be complicated and there is no point trying to start with Bluetooth - start from scratch. | |
| Jun 12, 2017 at 18:52 | comment | added | user39382 | @jorrebor Not the OP, but I can answer: definitely impossible with standard Bluetooth devices, quite likely impossible with any hardware at 2.4 GHz. (Keep in mind that 2.4 GHz has a wavelength of 12.5 cm, and you're asking for a resolution of less than half that!) | |
| S Jun 12, 2017 at 18:18 | history | suggested | Volodymyr Smotesko | CC BY-SA 3.0 |
added a real life example of time-of-flight used
|
| Jun 12, 2017 at 17:59 | review | Suggested edits | |||
| S Jun 12, 2017 at 18:18 | |||||
| Jun 12, 2017 at 16:58 | comment | added | jorrebor | I realize my question was unclear. The error margin should be in the range of 1 to 5 cm. The tags will be 10 to 40 meters apart. Does this change anything in your answer? | |
| Jun 11, 2017 at 19:56 | history | answered | Jack B | CC BY-SA 3.0 |