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Apparatus for antenna diversity using joint maximal ratio combining

  • US 7,545,778 B2
  • Filed: 09/20/2005
  • Issued: 06/09/2009
  • Est. Priority Date: 03/01/2002
  • Status: Expired due to Fees
First Claim
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1. A radio communication transceiver in an orthogonal frequency division multiplexed (OFDM) system using k sub-carrier frequencies, comprising:

  • a symbol mapping device for mapping a baseband signal to a set of communication symbols;

    N plurality of antennas, each antenna associated with a processing path;

    each processing path configured to process communication symbols, comprising;

    a multiplier configured to multiply the communication symbols with a plurality of complex transmit antenna weights selected for optimized transmission across the bandwidth, each complex transmit antenna weight a function of the k sub-carrier frequencies and having a magnitude and a phase;

    whereby N transmit signals are generated, each of which is weighted such that at substantially all sub-carrier frequencies of the OFDM signal, the sum of the power of the transmit signals across the N plurality of antennas of the transceiver is equal to a constant.

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