Patent ID: 8861661
Filing Date: 2014-10-14
Classification: H04B

Abstract:
1. An interference wave suppressing apparatus comprising: a demultiplexing unit configured to demultiplex a reception signal into a plurality of separate demultiplexed signals, each having predetermined bandwidth; an interference-wave detecting unit configured to determine, for each of the plurality of separate demultiplexed signals, based on a power value thereof, whether an interference wave is present; an interference-wave suppressing unit configured to change a signal value of one of the separate demultiplexed signals, in which the interference-wave detecting unit determines that an interference wave is present, to a value equal to or smaller than a predetermined value, output the one of the separate demultiplexed signals after the change, and also output the others of the plurality of separate demultiplexed signals, in which the interference-wave detecting unit determines that an interference wave is absent; and a multiplexing unit configured to output a multiplexed signal obtained by multiplexing signals output from the interference-wave suppressing unit, wherein the demultiplexing unit is configured to demultiplex the reception signal into the demultiplexed signals according to demultiplexing processing at N (N is an integer equal to or larger than 1) stages, two or more frequency conversion filter units configured to perform frequency conversion to shift a center frequency of an input signal by a predetermined frequency, extract a signal in a predetermined band from the signal after the frequency conversion, perform down-sampling processing of the extracted signal, and output the signal after the down-sampling, a channel filter configured to apply waveform shaping to each signal after processing by the frequency conversion filter unit at a final stage, and the channel filter performs the waveform shaping so that the signal after waveform shaping has a channel characteristic in that each channel has a portion overlapping an adjacent channel in a frequency direction and a sum of both amplitude of overlapping areas between the channel and the adjacent channel is 1.