Patent ID: 8275056
Filing Date: 2012-09-25
Classification: H04B,H04L

Abstract:
1. A receiver comprising: a channel characteristic calculation unit operable to calculate, based on pilot signals included in received signals, channel characteristics with respect to the pilot signals; a filter unit operable to perform, on the calculated channel characteristics, processing, which is at least one of (i) an interpolation and (ii) band limitation, using filter processing having frequency transfer characteristics capable of being frequency-shifted; an equalization unit operable to equalize the received signals based on the processed channel characteristics obtained as a result of the processing performed by the filter unit; and a filter control unit operable to determine a shift amount by which the frequency transfer characteristics are frequency-shifted, and control the frequency transfer characteristics, wherein the received signals include first signals being signals other than the pilot signals, wherein intervals in units of symbols at which the first signals are inserted into any one of carriers into which the first signals are inserted are shorter than intervals in units of symbols at which the pilot signals are inserted into any one of carriers into which the pilot signals are inserted, wherein the filter control unit observes channel characteristics with respect to the first signals included in the received signals and determines the shift amount based on a result of the observation, and wherein the filter unit frequency-shifts the frequency transfer characteristics by the determined shift amount.