Pulse shaping for multicarrier modulation

Pulse shaping for multicarrier modulation

  • CN 1,158,825 C
  • Filed: 07/03/1996
  • Issued: 07/21/2004
  • Est. Priority Date: 07/14/1995
  • Status: Active Grant
First Claim
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1. method that sends data on the communication channel of a communication system, the communication in described communication system between the transmitter and receiver is f by a carrier frequency cSystem carrier on communication channel on one group of subcarrier, carry out, described method comprises step:

  • Utilize inverse-Fourier transform IFFT circuit that in one group of data symbol each is modulated in one group of subcarrier one, to produce one group of modulated subcarriers, described data symbol comprises that each has a plurality of symbol C of symbol period T k, k=0 ..., N '"'"'-1, described modulated subcarriers comprises one first data-signal;

    Make described first data-signal and a pulse shaping waveform multiply each other, to produce one second data-signal, described pulse shaping waveform comprises the function that has one first and second amplitude at least, and wherein said first amplitude is greater than described second amplitude;

    And the utilization frequency relevant with employed certain pulses shaping function adjust coefficient and remove to adjust selected subcarrier, to keep the orthogonality in the data transmission procedure;

    On described system carrier, send described second data-signal.

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