Patent ID: 8300676

Claim:
A communication method for ultra-wide band (UWB) communication, comprising: generating a digital detection signal including a plurality of time symbols by digital-converting a detection signal corresponding to a received signal; estimating an average power value of the detection signal by calculating average power of the digital detection signal based on the digital detection signal; and when a predetermined reference power value is greater than the average power value, performing UWB communication through a predetermined first channel, wherein the first channel comprises a plurality of subcarriers; and when the average power value is greater than the reference power value, generating location information that corresponds to information on a subcarrier where an interfered signal exists by detecting a location of the interfered signal based on the digital detection signal; and performing UWB communication through a part of the plurality of subcarriers included in the first channel, excluding a subcarrier corresponding to the information, wherein the generating of the location information comprises: Fourier-transforming N time symbols among a plurality of time symbols included in the digital detection signal to generate N frequency symbols respectively corresponding to the N time symbols; generating a plurality of sample sums respectively corresponding to a plurality of subcarriers according to a predetermined detection bandwidth based on the N frequency symbols; performing operation for adding an absolute value of a real number and an absolute value of an imaginary number of each sample sum based on the plurality of sample sums to generate a plurality of sample absolute values respectively corresponding to the plurality of sample sums; generating a reference value for determining existence of the interfered signal based on the plurality of sample absolute values; and generating first location information corresponding to information on a subcarrier where the interfered signal exists among the plurality of subcarriers according to the detection bandwidth by comparing each of the plurality of sample absolute values with the reference value.