Problem statement

Applications

What’s the big deal in estimating ToF … here is a simple solution.

OK, fine, how about this idea … this can solve the earlier problem.

Let’s analyze the error with TWR

Improvement over TWR → How about three way ranging, also called Symmetric Double-Sided TWR (DS TWR)

Let’s analyze the error for DS TWR

Can we free ourselves from the turn around times? → Alternative Double Sided TWR (ADS TWR)

Let’s analyze the error for ADS TWR

Any other errors that can creep into ToF estimation?

We have done $1:1$ ToF so far … but what if we need $1:N$ ToF estimates?

ToF estimation popular with UWB (Ultra Wide Band) radios

References