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Enhanced uplink rate indicator

  • US 8,315,240 B2
  • Filed: 07/14/2006
  • Issued: 11/20/2012
  • Est. Priority Date: 07/20/2005
  • Status: Expired due to Fees
First Claim
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1. A method of indicating an uplink data rate for a first transmission segment in an OFDM wireless communication environment, comprising operating a communications device to perform the steps of:

  • determining a first rate option to be used in the first transmission segment;

    encoding information bits to coded bits and mapping coded bits to modulation symbols in accordance with the first rate option;

    identifying a first predetermined subset and a second predetermined subset of tone-symbols in the first transmission segment as a function of the first rate option, wherein a tone-symbol is a tone in an OFDM symbol period and tones are indexed in a logical order;

    mapping the modulation symbols to the tone-symbols of the first transmission segment;

    power-scaling a modulation symbol mapped to a tone-symbol of the first predetermined subset with a first parameter;

    power-scaling a modulation symbol mapped to a tone-symbol of the second predetermined subset with a second parameter, the second parameter being different from the first parameter;

    transmitting the first transmission segment;

    wherein said first transmission segment includes multiple tone-symbols in each of a plurality of consecutive symbol transmission time periods; and

    wherein said first predetermined subset of tone-symbols includes more tone-symbols than said second predetermined subset of tone-symbols.

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