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Transmit power control for an OFDM-based wireless communication system

  • US 7,151,740 B2
  • Filed: 02/28/2001
  • Issued: 12/19/2006
  • Est. Priority Date: 02/28/2001
  • Status: Expired due to Term
First Claim
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1. A method of controlling transmit power in an OFDM transmission system, said method comprising:

  • (a) transmitting from a transmitting end of said transmission system a series of pilot tones on multiple sub-channels of an OFDM transmission;

    (b) detecting on each of said sub-channels a power level of received pilot tones at a remote end OFDM receiver;

    (c) determining path loss in a physical path between the transmitting end and the remote end based on the level of the received pilot tones; and

    (d) controlling transmit power level of a transmitter associated with the remote end OFDM receiver by adjusting transmit power level according to the path loss determined in the determing step.

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