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Could someone who understands the radio technology please explain why using time-of-arrival and phase tricks with existing WiFi and Bluetooth signals is "wide-b
by offmycloud 7y ago
Could someone who understands the radio technology please explain why using time-of-arrival and phase tricks with existing WiFi and Bluetooth signals is "wide-banded" in any way?
- varenc 7y agoWiFi channel width is 20 MHz or 40 MHz. UWB has 500MHz channels. https://en.wikipedia.org/wiki/List_of_UWB_channels https://en.wikipedia.org/wiki/List_of_UWB_channels
- jsjohnst 7y agoWiFi channels can also be 80MHz (which my laptop is currently connected at) and 160MHz (which is still a bit rarely supported), but your point still stands.
- Throw7634959 7y agoThe wider the bandwidth the faster the rise time of each 'pulse'. The UWB standard allows for a known preamble sequence upon which a particular symbol is designated the ranging pulse. By each pulse having a rise time in the picoseconds it allows for an exact time of arrival to be measured. Exact timestamps can be recorded on each side of the transmission giving the final bit of information needed to calculate tof. edit: clarity of last sentence