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Device and method for on-line adaptive selection of baud rate and carrier frequency

  • US 5,297,186 A
  • Filed: 07/29/1991
  • Issued: 03/22/1994
  • Est. Priority Date: 07/29/1991
  • Status: Expired due to Term
First Claim
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1. A device for at least receiving at least a single-carrier modulated signal transmitted from a remote device utilizing at least one baud/carrier frequency over at least a first communication channel, comprising at least:

  • (A) a receiving means, operably coupled at least to the first communication channel, for receiving the single-carrier modulated signal transmitted by the remote device over any one of a plurality of frequency bands;

    (B) a filtering means, operably coupled to the receiving means, for at least providing a demodulated equalized received signal;

    (C) an output symbol determiner, operably coupled to the filtering means, for at least determining output symbols for the equalized received modulated signal;

    (D) a spectrum analyzing means, operably coupled to the filtering means and to the output symbol determiner, for at least utilizing the demodulated equalized received modulated signal and the output symbols for estimating at least one of a signal-to-noise ratio (SNR) spectrum and a noise power spectrum; and

    (E) a baud rate/carrier decision selecting means, operably coupled at least to the spectrum analyzing means, for utilizing information from the spectrum analyzing means for estimating at least one of;

    decoder signal-to-noise ratios (SNRs), maximum supported bit rates, and SNRs at band edges for at least some of the available baud rate and carrier frequency combinations to select adaptively a desired baud rate and carrier frequency selection in a data communication channel.

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