Patent ID: 8977667
Filing Date: 2015-03-10
Classification: G06F,H04L

Abstract:
1. A communication apparatus for communicating with another apparatus in orthogonal frequency-division multiplexing wireless communication, the communication apparatus comprising: a modulator that generates a modulation signal by dividing a data series equally into a certain number a factorial of which is equal to or greater than a number of patterns expressed by data of an input signal to generate subdata series, the data series being a set of data which has an autocorrelation property such that an autocorrelation value with a data series whose data has not been shifted is higher than an autocorrelation value with a data series whose data has been shifted, performing a calculation which multiplies a predetermined amplitude coefficient and a unique number defined for each subdata series by each element of the subdata series, respectively, and rearranging the subdata series applied the calculation based on rearrangement rules which are associated with the patterns expressed by the data of the input signal one by one and synthesizing the rearranged subdata series; a transformer that performs an inverse fast Fourier transformation on the modulation signal; a calculator that divides a calculation result of the transformer equally into the certain number to generate sub calculation results, and multiplies an equalization coefficient defined for each sub calculation result by each element of the sub calculation results; a synthesizer that generates a baseband signal by arranging the sub calculation results applied the calculation by the calculator, so that an arranged position corresponds to a position in the calculation result at a time of being divided equally by the calculator, and synthesizing the arranged result; and a transmitter that generates a transmission signal from the baseband signal to transmit.