If you make the addressing in AM, you can use just the radio waves to power a decider that can wake-up your device, and then you do the actual communication in FM.
But the wave can't be too faint, so I guess you co always need a bit more power at one side.
If you make the addressing in AM, you can use just the radio waves to power a decider that can wake-up your device, and then you do the actual communication in FM.
But the wave can't be too faint, so I guess you co always need a bit more power at one side.