Patent ID: 7869545

Claim:
A channel estimation method comprising: detecting a channel impulse response (CIR) distribution area by a CIR estimator scanning a signal containing noise and CIR information with a first window and a second window; wherein the second window is adjacent to the first window and wherein detecting the CIR distribution area further comprises: calculating by the CIR estimator a average power of the signal within the first window and a average power of the signal within the second window; determining by the CIR estimator a start point of the channel impulse response (CIR) distribution area using the average power of the signal within the first window and the average power of the signal within the second window; and determining by the CIR estimator an end point of the channel impulse response (CIR) distribution area using the average power of the signal within the first window and the average power of the signal within the second window.