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Apparatus and method for changing communication mode in multi-antenna system considering channel environment

  • US 8,140,122 B2
  • Filed: 02/26/2010
  • Issued: 03/20/2012
  • Est. Priority Date: 02/26/2009
  • Status: Expired due to Fees
First Claim
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1. A method for determining a multi-antenna transmission mode at a base station in a multi-antenna system, the method comprising:

  • when operating in a Multiple Input Multiple Output (MIMO) transmission mode as a multi-antenna transmission mode, determining a reference set point;

    updating a set point for transmit power control of a terminal according to an error occurrence in a signal received from the terminal;

    determining whether a channel to the terminal is a channel for applying the MIMO transmission mode by comparing the updated set point with the reference set point; and

    when the channel to the terminal is not the channel for applying the MIMO transmission mode, changing the multi-antenna transmission mode to a fixed transmission mode,wherein the reference set point comprises a value for determining whether the channel to the terminal is the channel for applying the MIMO transmission mode, andthe fixed transmission mode is a multi-antenna transmission mode operating in a Single Input Multiple Output (SIMO) transmission mode during a reference time.

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