OFDM signal transmission apparatus and method

#The present invention relates to an orthogonal frequency division multiplexing (OFDM) signal transmission apparatus, and a method thereof, and more particularly to an OFDM signal transmission apparatus in which the data transmission rate is enhanced when a digital broadcast is transmitted, and a method thereof.

#Digital Video Broadcasting-Terrestrial (DVB-T) standard adopted for terrestrial digital broadcasting in Europe uses an orthogonal frequency division multiplexing (OFDM) technique.

#OFDM is a type of multi carrier modulation, and has superior performance in both multi-path and portable receiving environments. Therefore, the OFDM has been noted as a modulation method appropriate for terrestrial digital television and digital audio broadcasting.

#FIG. 1 is a block diagram illustrating an OFDM signal transmission apparatus according to an exemplary embodiment of the present invention; and

#FIG. 2 is a flowchart provided to explain a method for transmitting an OFDM signal according to an exemplary embodiment of the present invention.

#The following are descriptions of various elements of the drawings. 100: transport stream generating unit 200: transport stream processing unit 201: first scrambler 203: first outer coder 205: first outer interleaver 207: first inner coder 209: second scrambler 211: second outer coder 213: second outer interleaver 215: second inner coder 217: inner interleaver 219: mapping unit 221: frame adaptation unit 223: inverse Fourier transform (IFT) unit 225: guard interval inserting unit 227: digital-to-analog converter (DAC) 229: transmitting unit Best Mode for Carrying Out the Invention

#The present invention will be explained in detail with reference to the drawings.

#FIG. 1 is a block diagram illustrating an orthogonal frequency division multiplexing (OFDM) signal transmission apparatus according to an exemplary embodiment of the present invention.