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RF signal processing in multi-antenna systems

  • US 20050025271A1
  • Filed: 07/29/2003
  • Published: 02/03/2005
  • Est. Priority Date: 07/29/2003
  • Status: Active Grant
First Claim
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1. A method for processing RF signals in a multi-antenna systems, comprising:

  • generating Lt input data streams in a transmitter;

    modulating the Lt weighted input data streams to RF signals;

    switching the RF signals to t≧

    Lt RF branches;

    applying a phase-shift transformation to the RF signals by a t×

    t matrix multiplication operator Φ

    1, whose output are t RF signals;

    transmitting the t RF signals over a channel by t transmit antennas;

    receiving the transmitted signals by r antennas in a receiver;

    applying a phase-shift transformation to the r RF signals by a r×

    r matrix multiplication operator Φ

    2;

    selecting Lr branches from the r streams;

    demodulated the Lr signal streams; and

    processing in baseband to recover output data streams corresponding to the input data streams.

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