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Blind signal separation using correlated antenna elements

  • US 7,414,579 B2
  • Filed: 09/22/2005
  • Issued: 08/19/2008
  • Est. Priority Date: 09/23/2004
  • Status: Expired due to Fees
First Claim
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1. A communications device for separating source signals provided by M signal sources, the communications device having an operating frequency and comprising:

  • an antenna array comprising N correlated antenna elements for receiving at least N different summations of the M source signals, with N and M being greater than 1, said N correlated antenna elements being spaced apart so that a distance D between any two immediately adjacent antenna elements is less than a wavelength λ

    of the operating frequency of the communications device, where 0<

    D<

    λ

    , said N correlated antenna elements comprising at least one active antenna element and up to N−

    1 passive antenna elements so that said antenna array forms a switched beam antenna;

    a receiver connected to said antenna array for receiving the at least N different summations of the M source signals; and

    a blind signal separation processor connected to said receiver for forming a mixing matrix comprising up to the at least N different summations of the M source signals, the mixing matrix having a rank equal to at least N, said blind signal separation processor for separating desired source signals from the mixing matrix.

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