Patent ID: 8848506

Claim:
An orthogonal frequency division multiplexing (OFDM) transmission device which transmits OFDM symbols to at least one reception device, the OFDM transmission device comprising: an OFDM transmission processing unit which generates a plurality of OFDM symbols; a pilot insertion unit which inserts pilot tones into each of the plurality of OFDM symbols; and a control unit which controls the pilot insertion unit to insert the pilot tones according to a pilot insertion pattern which is selected to correspond to a communication environment from among a plurality of pilot insertion patterns, wherein the control unit controls the pilot insertion unit so that when pilot insertion is skipped with respect to only some of the plurality of OFDM symbols according to a communication environment, each pilot tone is inserted in the set pilot insertion position on a remainder of the plurality of OFDM symbols, and wherein each pilot insertion position is set by inserting each pilot tone into a single OFDM symbol every n-th tone so that the pilot tone on the OFDM symbol is spaced apart from a pilot tone on a previous OFDM symbol by m tones, wherein n and m are natural numbers.