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SYSTEM AND METHOD FOR DISTRIBUTED INPUT DISTRIBUTED OUTPUT WIRELESS COMMUNICATIONS

  • US 20100172309A1
  • Filed: 12/14/2009
  • Published: 07/08/2010
  • Est. Priority Date: 07/30/2004
  • Status: Active Grant
First Claim
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1. A method for compensating for in-phase and quadrature (I/Q) imbalances in a multiple antenna system (MAS) with multi-user (MU) transmissions (“

  • MU-MAS”

    ) comprising;

    transmitting a training signal from each antenna of a base station to each of a plurality of wireless client devices, each of the client devices analyzing each training signal to generate channel characterization data, and receiving the channel characterization data at the base station;

    computing a plurality of MU-MAS precoder weights based on the channel characterization data, the MU-MAS precoder weights calculated to pre-cancel interference due to I/Q gain and phase imbalances and/or inter-user interference;

    precoding data using the MU-MAS precoder weights to generate precoded data signals for each antenna of the base station; and

    transmitting the precoded data signals through each antenna of the base station to each respective client device.

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