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System and method for joint maximal ratio combining using time-domain based signal processing

  • US 7,573,945 B2
  • Filed: 12/23/2003
  • Issued: 08/11/2009
  • Est. Priority Date: 03/01/2002
  • Status: Expired due to Fees
First Claim
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1. A method for communicating signals using radio frequency (RF) communication techniques, the method comprising:

  • generating a receive filter matrix from a signal received by a plurality of antennas of a first communication device from a second communication device, the receive filter matrix comprised of a plurality of sub-matrices each being a convolution matrix derived from a receive filter sub-vector, wherein each receive filter sub-vector defines complex weights associated with a receive tapped-delay line filter for a corresponding one of the plurality of antennas of the first communication device;

    computing a principal eigenvector of a product of the receive filter matrix and a Hermitian of the receive filter matrix, the principal eigenvector comprised of a plurality of sub-vectors each having a length corresponding to a number of taps of a transmit tapped-delay line filter associated with a corresponding one of the plurality of antennas of the first communication device;

    generating from the plurality of sub-vectors of the principal eigenvector a plurality of transmit filter sub-vectors that form a transmit filter vector, each transmit filter sub-vector associated with a corresponding one of the plurality of antennas of the first communication device and defining complex weights associated with the transmit tapped-delay line filter for a corresponding one of the plurality of antennas of the first communication device; and

    applying the transmit filter vector at the first communication device to a signal to be transmitted from the first communication device to the second communication device.

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