Patent ID: 8494797
Filing Date: 2013-07-23
Classification: H04B,H04W

Abstract:
1. An energy detection circuit used in a receiver for obtaining a signal initial time point corresponding to an input signal with reference to a digital signal corresponding to the input signal, wherein the energy detection circuit comprises: a value obtaining switch turned on in response to a control signal to provide an i a shift register used for buffering an (i−M−N+1) a first sliding window value obtainer used for buffering the (i−M−N+1) a second sliding window value obtainer used for buffering an (i−N+1) a first arithmetic unit used for obtaining a first parameter according to a weighting coefficient K and the (i−M−N+1) a second arithmetic unit used for obtaining a second parameter according to the (i−N+1) a comparator used for comparing the first parameter to the second parameter, and providing an energy detection signal when the second parameter is greater than the first parameter; and a processor used for setting the weighting coefficient K with an initial value, wherein the processor further determines whether the energy detection signal is received, and the processor determines an (i−N+1)