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Wireless transmission using an adaptive transmit antenna array

  • US 20050117660A1
  • Filed: 04/18/2003
  • Published: 06/02/2005
  • Est. Priority Date: 04/30/2002
  • Status: Active Grant
First Claim
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1. A method of closed loop wireless communication of signals using an adaptive transmit antenna array, in which a plurality of copies of signals to be transmitted by said transmit antenna array are produced with delays and weights (wnj) that are functions of the multi-path transmission channel characteristics (H) from said transmit antenna array to a receive antenna array of a receiver and are combined before transmission by said transmit antenna array, characterised in that the delays and weights (wnj) of the transmit copies for each transmit antenna element (n) are functions of the respective multi-path transmission channel characteristics (hn,m=1l=1,





  • ,hn,m=Ml=L)from that transmit antenna element to the receive antenna array such that the multi-path signal components propagated to each receiver element are received with distinguishable delays according to the propagation path, and that said receiver combines the received signal components from each receive antenna element with delays and weights (u) that are respective functions of the multi-path transmission channels.

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