Patent ID: 8369815
Filing Date: 2013-02-05
Classification: H04B,H04N

Abstract:
1. A method for spectrum noise detection using a receiver, comprising: slicing a spectrum of a frequency-domain signal into a plurality of spectrum blocks, and calculating an amplitude mean of each of the spectrum blocks and an average amplitude mean of the spectrum blocks; determining a cut-off threshold, a bandwidth check threshold that is amplitude threshold of spectrum bandwidth estimation, a variance lower bound and a variance upper bound that is upper bound and lower bound amplitude threshold of spectrum variance estimation, which are sorted in an ascending manner, according to the average amplitude; checking whether the amplitude mean is greater than the cut-off threshold; checking whether the amplitude mean range between the variance lower bound and the variance upper bound if the amplitude mean is greater than the cut-off threshold, and obtaining an estimation bandwidth corresponding to the spectrum blocks according to the bandwidth check threshold, and checking whether a central frequency of the estimation bandwidth approximates a central frequency of the spectrum of the frequency-domain signal and whether the estimation bandwidth is greater than a predetermined bandwidth; and determining the frequency-domain signal as a noise signal if the amplitude mean ranging between the variance lower bound and the variance upper bound exceeds a default value, and the central frequency of the estimation bandwidth approximates the central frequency of the spectrum of the frequency-domain signal and the estimation bandwidth is greater than the predetermined bandwidth.