Method and apparatus for the transmission and reception of data ". Several versions are described to provide the transmission and reception of data in a way improved.The data transmission is improved by including in a transmitter a null generator (110) to generate a sequence of symbols of the output data that exhibits void in the field of frequency in frequency paRticulares that a sequence of symbols of the input data display.A dowel driver (120) then adds a sequence of pilot symbols to this sequence of symbols to output data to create a sequence of symbols combined.As the sequence of symbols, pilot signals corresponding to the null pilot displays the sequence of symbols of data output in the frequency domain.The sequence of symbols combined displays pilots are orthogonal to the data in the field of frequency.
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