Patent ID: 8300522
Filing Date: 2012-10-30
Classification: H04L

Abstract:
1. An orthogonal frequency division multiplexing (OFDM) signal transmission apparatus, the apparatus comprising: an inverse Fourier transform (IFT) unit which transforms a frequency domain OFDM signal to a time domain OFDM signal according to one of transmission modes of 4K, 16K, and 32K; a guard interval inserting unit which inserts a guard interval into the transformed time domain OFDM signal according to a predetermined guard interval inserting rate; and a transmitting unit which transmits the OFDM signal having the guard interval, wherein the IFT unit performs an IFT on the frequency domain OFDM signal using an IFT coefficient and processes a frequency domain OFDM signal using a predetermined number of carriers, according to one of the transmission modes of 4K, 16K, and 32K, and wherein the IFT coefficient and the predetermined number of carriers are different from each other.