Patent ID: 8457224
Filing Date: 2013-06-04
Classification: H04L

Abstract:
1. A channel estimation apparatus comprising: a unit that performs channel estimation by signal processing in a frequency domain using a single carrier pilot signal; and a copying unit that copies one or a plurality of channel estimation values of end-side subcarriers in the frequency domain before transforming the channel estimation values in the frequency domain to a time domain, wherein the copying unit copies said one or a plurality of channel estimation values of the end-side subcarriers at locations of subcarriers of low frequency components and/or high frequency components outside a bandwidth of the received signal, a unit that transforms the channel estimation values in the frequency domain obtained by the copying unit into the time domain; a unit that substitutes zeros (0s) for a noise path that is a signal having only noise points, using a time window filter or noise threshold value control for the channel estimation values transformed into the time domain to remove one or more noise paths from a channel response; and a unit that transforms the channel estimation values in the time domain from which ore. or more noise paths is removed, into the frequency domain to obtain channel estimation values in the frequency domain.