Patent ID: 8031787
Filing Date: 2011-10-04
Classification: H04L

Abstract:
1. A method of channel estimation of a received OFDM signal, comprising: calculating an initial channel transfer function by channel estimation using the received OFDM signal; calculating a channel impulse response based on the initial channel transfer function; filtering successive channel impulse responses by a first filter having a first filter length to calculate a first filtered channel impulse response; classifying values of the first filtered channel impulse response as noise or signal contributions, respectively, as a function of a level of the values of the first filtered channel impulse response; calculating a noise-reduced channel impulse response from a second filtered channel impulse response, using the classification of the first filtered channel impulse response, wherein the second filtered channel impulse response is generated by filtering successive channel impulse responses by a second filter having a second filter length shorter than the first filter length; and calculating a noise-reduced channel transfer function based on the noise-reduced channel impulse response.