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Memory efficient OFDM channel estimation and frequency domain diversity processing

  • US 7,466,778 B2
  • Filed: 12/21/2006
  • Issued: 12/16/2008
  • Est. Priority Date: 12/22/2005
  • Status: Active Grant
First Claim
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1. A frequency domain diversity DVB receiver device comprising:

  • a. a first antenna port and a second antenna port for receiving radio signals;

    b. a radio signal processing circuit connected to said first antenna port, and a second radio frequency signal processing circuit connected to said second antenna port, each radio signal processing circuit converting the radio signals to digital samples;

    c. a first switch which alternately selects the digital samples of the first and the second radio signal processing circuits;

    d. a front-end processor which processes the digital samples selected by said first switch to provide time-domain symbols;

    e. a second switch synchronized with said first switch and connected to receive the output time-domain symbols of said front-end processor;

    f. a first time-domain symbol buffer and a second time-domain symbol buffer receiving from said second switch to receive time-domain symbols corresponding to digital samples received from the first and second radio signal processing circuits, respectively;

    g. a third switch which alternately receives time-domain symbols from said first and second time-domain symbol buffers;

    h. a fast fourier transform circuit receiving the time-domain symbols from the said third switch and converting the time-domain symbols into frequency domain symbols;

    i. a fourth switch synchronized with said third switch to receive the frequency domain symbols from the fast-fourier transform circuit;

    j. a first frequency domain symbol buffer and a second frequency domain symbol buffer connected to said fourth switch to receive frequency domain symbols corresponding to time-domain symbols output from the first and second time-domain symbol buffers, respectively; and

    k. a diversity processor which combines the frequency domain symbols from said first and second frequency-domain symbol buffers.

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