×

Echo MIMO: a method for optimal multiple input multiple output channel estimation and matched cooperative beamforming

  • US 20070099571A1
  • Filed: 10/31/2005
  • Published: 05/03/2007
  • Est. Priority Date: 10/31/2005
  • Status: Active Grant
First Claim
Patent Images

1. A method of estimating a communication channel comprising one or more sub-channels between at least a first transceiver and at least a second transceiver, the method comprising:

  • (a) transmitting a first set of training data from the first transceiver to the second transceiver;

    (b) receiving first observed signals from the transmitted first set of training data at the second transceiver, and re-transmitting said first observed signals to the first transceiver;

    (c) receiving the re-transmitted first observed signals at the first transceiver, and calculating a roundtrip channel estimate at the first transceiver;

    (d) transmitting a second set of training data from the second transceiver to the first transceiver;

    (e) receiving second observed signals from the transmitted second set of training data at the first transceiver, and calculating a reverse channel estimate at the first transceiver based on the received second observed signals; and

    (f) calculating a forward channel estimate at the first transceiver based on the calculated first round-trip channel estimate and the calculated incoming channel estimate.

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