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CHANNEL ESTIMATION FOR A VERY LARGE-SCALE MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) SYSTEM

  • US 20120288022A1
  • Filed: 01/03/2012
  • Published: 11/15/2012
  • Est. Priority Date: 05/09/2011
  • Status: Active Grant
First Claim
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1. A method of transmitting pilot reference signals utilized by a receiver for channel estimation in a Multiple-Input Multiple-Output (MIMO) communication system in which a transmitter utilizes a plurality of transmit antennas, the method comprising the steps of:

  • spacing the plurality of transmit antennas such that spacing between adjacent antennas provides a spatial correlation coefficient greater than a threshold level;

    selecting by the transmitter, a selected subset of the plurality of transmit antennas for transmitting the pilot reference signals; and

    transmitting the pilot reference signals only from the selected subset of transmit antennas to a receiver.

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