Patent ID: 8432996
Filing Date: 2013-04-30
Classification: H04L

Abstract:
1. A transmitter transmitting a modulation wave, the transmitter comprising: an OFDM symbol generator for generating an effective symbol including a plurality of sub-carriers orthogonal to each other in frequency by applying inverse Fourier transform to a plurality of transmitter signals, and sequentially generating an OFDM symbol in which a signal in a first period from a first end of the effective symbol is added to a second end of the effective symbol as a guard interval, the second end being the other end of the effective symbol; and a convolution filter for performing an convolution operation on data strings at a plurality of sampling points of the OFDM symbol, the convolution operation being performed on as many first data strings as a certain number of taps at a time; wherein when the convolution filter performs a convolution operation on the first data strings including a data string at the first end of the effective symbol, the convolution filter performs the convolution operation on the first data strings in which a data string at the second end of the effective symbol is cyclically added to a data string at the first end, wherein the convolution filter comprises a shift register into which data strings of the OFDM symbol are input in sequence, an operation section performing a convolution operation on the first data strings as many as the certain number of taps in the shift register, and a storage section storing the data string at the second end; wherein when the operation section performs a convolution operation on the first data strings including a data string at the first end of the effective symbol, the operation section performs the convolution operation on the data string at the first end in the shift register and the data string at the second end in the storage section.