ENERGY DETECTION METHOD AND AN ENERGY DETECTION CIRCUIT USING THE SAME

摘要

An energy detection method is provided. The method obtains an initial time point of an input signal with reference to a digital signal corresponding to the input signal. An ith sample value is obtained by sampling the digital signal. The (i−M−N+1)th to the (i−N)th sample values and the (i−N+1)th to the ith sample value are buffered. The weighting coefficient is set to with initial value. A first parameter is obtained according to the weighting coefficient and the (i−M−N+1)th to the (i−N)th sample values, and a second parameter is obtained according to the (i−N+1)th to the ith sample values. A comparison between the first parameter and the second parameter is made, and the sampling time point of the (i−N+1)th sample value is determined as the signal initial time point when the second parameter is greater than the first parameter.