Apparatus for transmitting and receiving data to provide high-speed data communication and method thereof

Abstract

In the present invention, data generated from a source unit are distributed to at least one bandwidth; the data distributed to the respective bandwidths are encoded in order to perform an error correction; the encoded data are distributed to at least one antenna; a subcarrier is allocated to the data distributed to the respective antennas, and an inverse Fourier transform is performed; a short preamble and a first long preamble corresponding to the subcarrier are generated; a signal symbol is generated according to a data transmit mode; and a frame is generated by adding a second long preamble between the signal symbol and a data field for the purpose of estimating a channel of a subcarrier which is not used.

1 . An apparatus for wireless communication, comprising:
 a processor; and   a memory coupled to the processor,
 wherein the processor, when instructions stored in the memory is executed, is configured to: 
 generate a frame, the frame comprising:
 a first preamble, 
 a second and a third preambles positioned subsequent to the first preamble, 
 a first bit stream positioned between the second preamble and the third long preamble, and 
 a data field positioned subsequent to the third preamble; and 
 
 transmit the frame,
 wherein the first bit stream comprises information indicating whether or not the frame is transmitted using space time block coding, the first bit stream comprising at least one bit. 
 
   
     
     
         2 . The apparatus of  claim 1 , wherein the third preamble comprises a fourth preamble and a fifth preamble. 
     
     
         3 . The apparatus of  claim 2 , wherein the second preamble is preceded by a guard interval having a length of 1.6 μsec, each of the fourth and fifth long preambles is respectively preceded by a guard interval having a length of 0.8 μsec, and the data field is preceded by a guard interval having a length of 0.8 μsec.