System and method for transmitting datain a multiple-branch transmitter-diversity orthogonal frequency-division multiplexing (ofdm) system

Abstract

A system and method for transmitting data in multiple-branch transmitter-diversity OFDM systems is presented. In one embodiment, an approach is taken where an inverse Fourier transform (IFT) is performed on data prior to encoding the data for transmission in the multiple-branch transmitter-diversity system. In another embodiment an IFT is performed on data prior to encoding the data using a space-time block code (STBC) algorithm.

1 . A transmitter comprising:
 an inverse Fourier transform (IFT) circuit performing_an IFT on a data block to produce an inverse-Fourier-transformed data block; and   a space-time block-code (STBC) encoder encoding the inverse-Fourier-transformed data block for transmission in a multiple-branch transmitter-diversity system.   
   
   
       2 . The system of  claim 1 , wherein the STBC encoder comprises circular-shift operation logic performing a circular shift operation on the inverse-Fourier-transformed data block. 
   
   
       3 . The system of  claim 1 , wherein the STBC encoder encodes the inverse-Fourier-transformed data block using a STBC algorithm. 
   
   
       4 . The system of  claim 1 , further comprising a wireless communication device, the wireless communication device housing the transmitter. 
   
   
       5 . In a wireless OFDM communication device employing multiple-branch transmitter diversity, a method comprising:
 performing an inverse Fourier transform on a data block to produce an inverse-Fourier-transformed data block; and   encoding the inverse-Fourier-transformed data block by using a space-time block-code algorithm for transmission in a multiple-branch transmitter-diversity system.   
   
   
       6 . The method of  claim 5 , further comprising: performing a circular shift operation on the inverse-Fourier-transformed data block. 
   
   
       7 . A wireless OFDM communication device employing multiple-branch transmitter diversity, the wireless communication device comprising:
 means for performing an inverse Fourier transform on a data block to produce an inverse-Fourier-transformed data block; and   means for encoding the inverse-Fourier-transformed data block by using a space-time block-code algorithm for transmission in a multiple-branch transmitter-diversity system.   
   
   
       8 . The wireless communication device of  claim 7 , further comprising:
 means for performing a circular shift operation on the inverse-Fourier-transformed data block.