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Low peak-to-average power ratio transmission in frequency-division multiple access systems

  • US 9,036,569 B2
  • Filed: 09/21/2011
  • Issued: 05/19/2015
  • Est. Priority Date: 02/09/2006
  • Status: Active Grant
First Claim
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1. A method for communication, comprising:

  • in a multiple-access communication system that uses a plurality of subcarriers, allocating first subcarriers within the plurality to a first communication terminal for transmitting first data, and second subcarriers within the plurality to a second communication terminal for transmitting second data;

    assigning the first communication terminal to modulate the first data onto at least some of the first subcarriers using a first multi-carrier modulation scheme to produce a first signal, wherein the first multi-carrier modulation scheme modulates data bits onto data symbols, and modulates the modulated data symbols onto the subcarriers with a first peak-to-average power ratio (PAPR) when modulating a first given number of the data bits and a second given number of the subcarriers;

    assigning the second communication terminal to modulate the second data onto at least some of the second subcarriers using a second multi-carrier modulation scheme, so as to produce a second signal, wherein the second multi-carrier modulation scheme modulates the data bits onto the data symbols, and modulates the modulated data symbols onto the subcarriers with a second PAPR, less than the first PAPR, when modulating the same first given number of the data bits and the same second given number of the subcarriers; and

    communicating simultaneously with the first and second communication terminals by simultaneously receiving the first and second signals over the first and second subcarriers.

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