wimaxpreamble.m

基于MATLAB的OFDM发送

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% The MIT License 
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% Copyright (c) 2007 Alfred Man Cheuk Ng, [e-mail] 
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% obtaining a copy of this software and associated documentation 
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pAll = [ 0; -1-1j; 1+1j; -1+1j; -1+1j; -1-1j; 1+1j; 1+1j; 1+1j; -1-1j; 1+1j; 1-1j; 1-1j; 1-1j; -1+1j; -1+1j; 
	 -1+1j; -1+1j; 1-1j; -1-1j; -1-1j; -1+1j; 1-1j; 1+1j; 1+1j; -1+1j; 1-1j; 1-1j; 1-1j; -1+1j; 1-1j; -1-1j; -1-1j; -1-1j; 1+1j;
	 1+1j; 1+1j; 1+1j; -1-1j; -1+1j; -1+1j; 1+1j; -1-1j; 1-1j; 1-1j; 1+1j; -1-1j; -1-1j; -1-1j; 1+1j; -1-1j; -1+1j; -1+1j; 
	 -1+1j; 1-1j; 1-1j; 1-1j; 1-1j; -1+1j; 1+1j; 1+1j; -1-1j; 1+1j; -1+1j; -1+1j; -1-1j; 1+1j; 1+1j; 1+1j; -1-1j; 1+1j; 1-1j; 
	 1-1j; 1-1j; -1+1j; -1+1j; -1+1j; -1+1j; 1-1j; -1-1j; -1-1j; 1-1j; -1+1j; -1-1j; -1-1j; 1-1j; -1+1j; -1+1j; -1+1j; 1-1j; -1+1j;
	 1+1j; 1+1j; 1+1j; -1-1j; -1-1j; -1-1j; -1-1j; 1+1j; 1-1j; 1-1j;
         0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0;
	 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0; 0;
	 1-1j; 1-1j; -1-1j; 1+1j; 1-1j; 1-1j; -1+1j; 1-1j; 1-1j; 1-1j; 1+1j; -1-1j; 1+1j; 1+1j; -1-1j; 1+1j; -1-1j; -1-1j; 1-1j; 
	 -1+1j; 1-1j; 1-1j; -1-1j; 1+1j; 1-1j; 1-1j; -1+1j; 1-1j; 1-1j; 1-1j; 1+1j; -1-1j; 1+1j; 1+1j; -1-1j; 1+1j; -1-1j; -1-1j; 1-1j; 
	 -1+1j; 1-1j; 1-1j; -1-1j; 1+1j; 1-1j; 1-1j; -1+1j; 1-1j; 1-1j; 1-1j; 1+1j; -1-1j; 1+1j; 1+1j; -1-1j; 1+1j; -1-1j; -1-1j; 1-1j; 
	 -1+1j; 1+1j; 1+1j; 1-1j; -1+1j; 1+1j; 1+1j; -1-1j; 1+1j; 1+1j; 1+1j; -1+1j; 1-1j; -1+1j; -1+1j; 1-1j; -1+1j; 1-1j; 1-1j;
	 1+1j; -1-1j; -1-1j; -1-1j; -1+1j; 1-1j; -1-1j; -1-1j; 1+1j; -1-1j; -1-1j; -1-1j; 1-1j; -1+1j; 1-1j; 1-1j; -1+1j; 1-1j; -1+1j;
	 -1+1j; -1-1j; 1+1j];
pAllSz = size(pAll);
for row = 1:pAllSz(1)
     if (mod(row-1,4) == 0)
        pShort(row) = pAll(row);
     else 
        pShort(row) = 0;
     end
end
pShort = 2*conj(pShort);
pShort = ifft(pShort);
pShortRel = real(pShort);
pShortImg = imag(pShort);
fid = fopen('WiMAXPreambles.txt', 'wt');
fprintf(fid,'Short Preambles:\n');
for row = 1:pAllSz(1)
     fprintf(fid,'%6.5f, %6.5f\n',pShortRel(row),pShortImg(row));
end
for row = 1:pAllSz(1)
     if (mod(row-1,2) == 0)
        pLong(row) = pAll(row);
     else 
        pLong(row) = 0;
     end
end
pLong = sqrt(2)*conj(pLong);
pLong = ifft(pLong);
pLongRel = real(pLong);
pLongImg = imag(pLong);
fprintf(fid,'Long Preambles:\n');
for row = 1:pAllSz(1)
     fprintf(fid,'%6.5f, %6.5f\n',pLongRel(row),pLongImg(row));
end
fclose(fid);