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Why don't they just use the WIFI spectrum? Have legitimate messages so that it doesn't mess up existing systems, and send periodic pings whose radio signals th
by kstenerud 12y ago
Why don't they just use the WIFI spectrum?
Have legitimate messages so that it doesn't mess up existing systems, and send periodic pings whose radio signals the lawnmower can track. As an added bonus, you'd have a full communications network to talk to it with.
- gee_totes 12y agoHow will the lawnmower know where it is with just WiFi?
- kstenerud 12y agoThe same way it would know where it is with the 6240-6740 MHz beacons.
- oh_sigh 12y agoThe beacons probably output a continuous wave of a certain amplitude at that frequency. This would be classed as interference on at least the wifi spectrums so it is not allowed.
- kstenerud 12y agoThat's why you send actual 802.11 messages instead of a continuous wave.
- oh_sigh 12y agoAnd how do you determine your location based on an 802.11 message?
- kstenerud 12y agoThe same way you determine a location based on any regularly occurring radio signal (in fact, the same way they propose to determine location in their requested spectrum). The only reason to encode a proper 802.11 message would be so as not to interfere with other devices in range.
- snowwrestler 12y agoBy analyzing differentials in the signals from each beacon, which is how WiFi positioning systems work now. http://en.wikipedia.org/wiki/Wi-Fi_positioning_system http://en.wikipedia.org/wiki/Wi-Fi_positioning_system Anyway, WiFi actually operates in unlicensed spectrum, not in WiFi-specific spectrum, so continuous carrier waves would be legal too.