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Spectral optimization for communication under a peak frequency-domain power constraint

  • US 6,839,429 B1
  • Filed: 03/10/1999
  • Issued: 01/04/2005
  • Est. Priority Date: 12/19/1997
  • Status: Expired due to Fees
First Claim
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1. A method for communicating data on a set of communications channels limited by predetermined peak power constraints in frequency, and wherein each communications channel in the set of communications channels is subject to interference, the method comprising:

  • determining channel transfer functions of the set of communications channels;

    determining interference characteristics of the set of communications channels;

    determining transmit spectra for the set of communications channels in response to the channel transfer functions, the interference characteristics, and the predetermined peak power constraints in frequency, wherein said determining the transmit spectra comprises using a peak-constrained water-filling technique to determine power spectral density functions for the set of communications channels; and

    transmitting data on the set of communications channels with spectral power distributions given by the transmit spectra.

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