×

MIMO system with multiple spatial multiplexing modes

  • US 8,483,188 B2
  • Filed: 05/05/2008
  • Issued: 07/09/2013
  • Est. Priority Date: 10/25/2002
  • Status: Active Grant
First Claim
Patent Images

1. A method of transmitting data in a wireless multiple-access multiple-input multiple-output (MIMO) communication system, comprising:

  • selecting a first user terminal for data transmission in a first transmission interval;

    selecting a first spatial multiplexing mode to use for the first user terminal based on channel state information, the first spatial multiplexing mode being a steered spatial multiplexing mode;

    selecting a second user terminal for data transmission in a second transmission interval;

    selecting a second spatial multiplexing mode to use for the second user terminal based on channel state information, the second spatial multiplexing mode being a non-steered spatial multiplexing mode;

    scheduling the first user terminal for data transmission in the first transmission interval with the first spatial multiplexing mode;

    scheduling the second user terminal for data transmission in the second transmission interval with the second spatial multiplexing mode;

    spatially processing a first plurality of data streams, having a selection of a first plurality of rates, with a plurality of steering vectors to transmit the first plurality of data streams on a first plurality of orthogonal spatial channels of a first MIMO channel for the first user terminal; and

    spatially processing a second plurality of data streams, having a selection of a second plurality of rates, to transmit the second plurality of data streams on a second plurality of orthogonal spatial channels of a second MIMO channel for the second user terminal.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×