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Communication system using OFDM for one direction and DSSS for another direction

  • US 8,873,516 B2
  • Filed: 10/15/2010
  • Issued: 10/28/2014
  • Est. Priority Date: 03/09/2001
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • transmitting an orthogonal frequency division multiplexing (OFDM) signal of a plurality of OFDM signals in a downlink;

    receiving a frequency hopping signal generated by a subscriber in an uplink, said received frequency hopping signal not comprising said plurality of OFDM signals; and

    enabling use of an OFDM subcarrier cluster of said OFDM signal using said received frequency hopping signal, said OFDM subcarrier cluster containing at least two physical subcarriers of said OFDM signal.

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