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Methods and apparatus for multi-carrier communications with variable channel bandwidth

  • US 10,511,417 B2
  • Filed: 10/09/2017
  • Issued: 12/17/2019
  • Est. Priority Date: 05/01/2004
  • Status: Active Grant
First Claim
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1. A cellular base station comprising:

  • circuitry configured to transmit a broadcast channel in an orthogonal frequency division multiple access (OFDMA) core-band, wherein the core-band includes an operating center frequency and a first plurality of subcarriers, wherein the core-band is utilized to communicate a primary preamble sufficient to enable radio operations with a mobile station via the core-band, the primary preamble comprising an OFDM symbol corresponding to a particular frequency pattern within the core-band; and

    circuitry configured to transmit, after radio operations with the mobile station is established via the core-band, control and data signals to the mobile station using a variable band that includes the first plurality of subcarriers of the core-band and a second plurality of subcarriers of a sideband, and receive, after radio operations with the mobile station is established via the core-band, data signals from the mobile station via the first and second plurality of subcarriers of the variable band.

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