System and method of generating a received signal strength indication, the method including: selecting a high power level of a transmitter to be received above a receiver threshold at a predetermined distance from the transmitter; selecting a low power level of the transmitter to be received below the receiver threshold at the predetermined distance; transmitting a marker signal at high power; and adjacent in time to the marker signal, transmitting a power-varying signal, wherein a power of the power-varying signal varies monotonically between the high power level and the low power level.