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MIMO system with multiple spatial multiplexing modes

  • US 8,355,313 B2
  • Filed: 05/05/2008
  • Issued: 01/15/2013
  • Est. Priority Date: 10/25/2002
  • Status: Expired due to Term
First Claim
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1. A method of transmitting data in a wireless multiple-access multiple-input multiple-output (MIMO) communication system, comprising:

  • selecting at least one user terminal for data transmission;

    selecting a spatial multiplexing mode, from among a plurality of spatial multiplexing modes supported by the system, to use for the at least one user terminal, wherein the spatial multiplexing mode is selected between a steered spatial multiplexing mode and a non-steered spatial multiplexing mode;

    selecting a plurality of rates for a plurality of data streams to be transmitted via a plurality of spatial channels of a MIMO channel for the at least one user terminal; and

    scheduling the at least one user terminal for data transmission with the plurality of selected rates and the selected spatial multiplexing mode; and

    sending information regarding the scheduling to the at least one user terminal via a wireless channel.

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