literature and internet articles often only explain UWB’s much higher positioning accuracies with its much higher bandwidth compared to the bandwidth of other narrowband technologies such as WiFi/Bluetooth.
For me the bandwidth is only a very good indicator for how much data can be transmitted over a second but I don’t understand how this could help to determine positionins more accurately. It seems that high bandwidth enables us to make use of ToF whereas ToF isn’t available in narrowband systems. But why is that the case?
In APS006 Part 1 of Decawave docs there is this graphic which should explain this situation. Essentially the signal level in narrowband systems rises slower which is subject to higher interference of other signals. I get that but then my question is why does this slow rise only happen in narrowband systems? Is it because UWB makes use of impulse radio (IR) and narrowband makes use of continuous waveforms? But why doesn’t a narrowband system use IR then, too?
Please notice that I am not coming from a radio transmission engineering background so my knowledge isn’t that big in this field.