Patent ID: 8199765

Claim:
A method of communicating among a plurality of stations in a wireless environment in which a first signal having a first center frequency is present in a first frequency band, the plurality of stations communicating in a second frequency band having a second center frequency, the first center frequency and the second center frequency being mutually spaced apart by a separation frequency, the method comprising a transmitting method and a receiving method, the transmitting method including: generating a transmit packet signal according to transmit data and a control signal; modulating the transmit packet signal onto a carrier signal having the second center frequency to generate a modulated signal; controlling a transmitting power level of the modulated signal; and transmitting the modulated signal at the controlled transmitting power level; and the receiving method including: receiving an incoming signal including the first signal and a second signal having the second center frequency, thereby obtaining a received signal; generating a third signal by frequency down-conversion of the received signal so that the second signal is converted to a baseband signal; sampling the third signal at a first sampling frequency, thereby converting the third signal to a discrete received signal; and detecting a level of the first signal as interference in the discrete received signal.